WO2004013480A1 - 内燃機関の圧縮比可変装置 - Google Patents
内燃機関の圧縮比可変装置 Download PDFInfo
- Publication number
- WO2004013480A1 WO2004013480A1 PCT/JP2003/009856 JP0309856W WO2004013480A1 WO 2004013480 A1 WO2004013480 A1 WO 2004013480A1 JP 0309856 W JP0309856 W JP 0309856W WO 2004013480 A1 WO2004013480 A1 WO 2004013480A1
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- WO
- WIPO (PCT)
- Prior art keywords
- compression ratio
- piston
- movable
- ratio position
- piston inner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/044—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of an adjustable piston length
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
- F02D15/02—Varying compression ratio by alteration or displacement of piston stroke
Definitions
- the present invention relates to a compression ratio variable device for an internal combustion engine.
- the present invention relates to a piston inner connected to a connecting rod via a piston pin, and a piston inner connected to the piston inner with an outer end face facing a combustion chamber. It consists of a piston compression that can move between a low compression ratio position and a high compression ratio position close to the combustion chamber.
- the piston reduction is operated at the low compression ratio position to reduce the engine compression ratio, and to operate at the high compression ratio position.
- the present invention relates to an improvement in the compression ratio and an improvement.
- a compression ratio variable device for such an internal combustion engine, (1) the piston shaft is screwed around the outer periphery of the piston inner, and the piston outer is rotated forward and backward to advance and retreat with respect to the piston inner, and the low compression ratio position and One that operates at a high compression ratio position (for example, see Japanese Patent Application Laid-Open No. H11-117779) and (2) a piston rotor is axially slidably fitted on the outer periphery of a pistonina. An upper hydraulic chamber and a lower hydraulic chamber are formed between the piston inner and the rotor, and the hydraulic pressure is alternately supplied to these hydraulic chambers so that the piston rotor can be operated at the low compression ratio position and the high compression ratio position. (For example, see Japanese Patent Publication No. 7-111330).
- the present invention enables the compression ratio to be accurately switched to at least three stages of a low compression ratio, a medium compression ratio, and a high compression ratio without rotating the piston rotor.
- An object of the present invention is to provide a compression ratio variable device for an internal combustion engine.
- a variable compression ratio apparatus for an internal combustion engine is provided with a piston inner connected to a connector via a piston pin, and slidably fitted to the outer periphery of the piston inner only in the axial direction.
- a piston inner connected to a connector via a piston pin, and slidably fitted to the outer periphery of the piston inner only in the axial direction.
- With the outer end face facing the combustion chamber and at least one medium compression ratio between the low compression ratio position near the piston piston, the high compression ratio position near the combustion chamber, and the intermediate between the low compression ratio position and the high compression ratio position.
- a piston rotor that can be moved to a position, and at least two sets of raising means interposed in series in the axial direction between the piston inner and the outer.
- a movable raising member which can be individually rotated between the non-raising position and the raising position is provided, and both movable raising members are rotated to the non-raising position.
- the piston lifter is held at the middle compression ratio position when only one movable lifting member is rotated to the raised position, and both movable lifting members are rotated to the raised position. It is characterized in that when it is moved, the piston shaft is held at the high-pressure compression ratio position.
- At least two movable raising members are only rotated between the non-raising position and the raising position, respectively, so that the position of the piston rotor is at least the low compression ratio position, the medium compression ratio position and the high compression ratio position. It is possible to accurately switch to three stages of the compression ratio position, and to respond to various operating conditions of the internal combustion engine in detail.
- the piston rotor does not rotate with respect to the piston inner during position control, so the top shape of the piston outer facing the combustion chamber corresponds to the shape of the combustion chamber and the arrangement of the suction and exhaust valves. The compression ratio at the compression ratio position can be effectively increased.
- FIG. 1 is a longitudinal sectional front view of an essential part of an internal combustion engine equipped with a variable compression ratio device according to a first embodiment of the present invention.
- Fig. 2 is an enlarged cross-sectional view taken along the line 2-2 in Fig. 1, showing a low compression ratio state.
- Fig. 3 is a cross-sectional view taken along the line 3-3 in Fig. 2
- Fig. 4 is a cross-sectional view taken along the line 4-14 in Fig. 2
- Fig. 6 is a sectional view taken along the line 6-5 in Fig.
- Fig. 7 is a sectional view taken along the line 7-7 in Fig. 2 Fig.
- FIG. 8 is a sectional view taken along the line 8-8 in Fig. 2, and Fig. Figure showing the state of the medium compression ratio
- Figure 10 is a sectional view taken along the line 10--10 in Figure 9
- Figure 11 Fig. 9 is a sectional view taken along the line 11--11 in Fig. 9
- Fig. 12 is a sectional view taken along the line 12--12 in Fig. 9
- Fig. 13 is a view showing the state of high compression ratio
- Fig. 14 is a sectional view taken along the line 14-14 in Fig. 13
- Fig. 15 is a sectional view taken along the line 15-15 in Fig. 13, and Fig.
- FIG. 16 is a sectional view taken along the line 16-16 in Fig. 13 Fig. 17, Fig. 17 illustrates the operation of each part in the low compression ratio state, Fig. 18 illustrates the operation of each part in the middle compression ratio state, Fig. 19 illustrates the operation of each part in the high compression ratio state, Figs. 20A to FIG. 20E are explanatory diagrams of the operation of the first and second raising means, and FIG. 21 is a sectional view taken along the line 21--21 of FIG. FIGS. 22A to 22E show a second embodiment of the present invention, and correspond to FIGS. 2OA to 20E.
- the engine body 1 of the internal combustion engine E includes a cylinder block 2 having a cylinder bore 2a, a crankcase 3 connected to a lower end of the cylinder block 2, and a combustion chamber connected to the cylinder bore 2a.
- the piston 5 which has a cylinder head 4 and is connected to the upper end of the cylinder block 2 and has a small end 7a of the connecting rod ⁇ ⁇ Are connected via a piston pin 6, and the large end 7b of the connecting rod 7 is rotatably supported on the crankcase 3 via a pair of left and right bearings 8, 8 '.
- the piston 5 is slidable on a piston inner 5a connected to a small end 7a of a connecting rod 7 via a piston pin 6, and on an outer peripheral surface of the piston inner 5a and an inner peripheral surface of the cylinder pore 2a. And a piston 5b whose top face faces the combustion chamber 4a.
- a plurality of pistons are slidably in close contact with the inner circumference of the cylinder pore 2a around the circumference of the piston outer 5b. Rings 10a to 10c are mounted.
- a plurality of spline teeth 11 a and a spline groove 11 1b extending in the axial direction of the piston 5 and engaging with each other are provided on the sliding engagement surfaces of the piston inner 5a and the piston 5b. Are formed respectively, and the piston inner and the outer 5a, 5b cannot be rotated relative to their axes.
- the first raising means comprises: an annular first movable raising member 14 x rotatably fitted to a pivot 12 integrally formed coaxially with the upper surface of the piston inner 5 a; An annular first fixed raising member 13 which is spline-fitted to the cylindrical pivot 19 which is coaxially secured to the upper end face of the cylinder 12 with a screw 51 so as to be slidable in the axial direction. .
- the first movable raising member 14 can reciprocate between the non-raising position A and the raising position B set around the pivot portion 12 on the upper surface of the piston inner 5a.
- the first cam mechanism 15 which can raise and lower the first fixed raising member 13 along the pivot 19! Is the first movable raising member 14 4 and the first fixed raising member 13! It is provided between them.
- the first cam mechanism 15! Is the first movable lifting member 14! An upward cam 15 xa formed by arranging peaks and valleys in the circumferential direction on the upper surface of a rectangular wave, and a mountain with valleys on the lower surface of the first fixed raising member 13.
- the downward cams 15 b are formed at the peaks and valleys of the upward cam 15 xa. 1 5!
- the valleys of b join, the movement of the first fixed raising member 13 to the lowering position is allowed.
- the upward cam 15! The crest of a, 15 a, and the crest of b, overlap so that the first fixed lifting member 13 can be held at the ascending position.
- the first additional means R 2, the first fixing raising member 1 3 second movable upper surface at the pivot portion 1 2 to rotate and axially slidably circular fitting annular x raising member 1 4! Is provided.
- the second movable raising member 14 can reciprocate between the non-raising position ⁇ and the raising position B set around the pivot portion 12 on the flat upper surface of the first fixed raising member 13 ⁇ .
- the second cam mechanism 15 2, which can raise and lower the piston 5 b with the reciprocating rotation, comprises a second movable raising member 14 ⁇ ⁇ and a piston. It is provided between the outer 5b.
- the second cam mechanism 15 is a second movable raising member 14! To the upper surface peaks and valleys and the upward cam 1 5 2 a formed by arranging the rectangular wave in the circumferential direction, also serves as a ceiling wall of Pisutonauta 5 b the second fixed raising member 1 3 2, the lower surface When the second movable lifting member 14 is in the non-raising position A, the upward cam is formed of a downward cam 15 2 b formed by arranging peaks and valleys in a rectangular wave shape in the circumferential direction.
- the pivot 12 is divided into a plurality of circumferentially spaced blocks to receive the small end 7a of the connecting rod 7.
- a retaining ring 50 which opposes the upper surface of the second movable raising member 14 and prevents its detachment from the pivot 19, is fixed by a screw 51.
- first and second movable lifting members 14 and 14 2 are both controlled to the non-raising position A, either of the first and second cam mechanisms 15 i or 15 2 also, the mountain portion of the upward cam 1 5 ⁇ a, 1 5 2 a and valleys, by valleys and crests of the downward cam 1 5 b, 1 5 2 b is ⁇ , Bisuton'in'na the Pisutonau evening 5 b 5
- the position can be controlled to the low compression ratio position L closest to the a side (see Fig. 2 OA), and the second movable lifting member 14 is held at the non-raising position A while the first movable lifting member is kept in the state.
- the piston rotor 5b can be controlled to the middle compression ratio position M, which is pushed up from the low compression ratio position to the combustion chamber 4a by a predetermined distance ( Figure 2 0 C see), further when pivoted to the raised position B the second movable raising member 1 4 i, the second cam mechanism 1 5 downward cam to the crest of the upward cam 1 5 2 a in 2 1 5
- a predetermined distance Figure 2 0 C see
- the second cam mechanism 1 5 downward cam to the crest of the upward cam 1 5 2 a in 2 1 5
- the rotation angle from the non-raised position A to the raised position B in 14 ⁇ and 14 2 can be set small, and at the same time, the area of the top surface of each peak can be increased.
- a stop ring 18 abutting on the lower end surface of the piston inner 5a is locked on the inner peripheral surface of the lower end of the piston outer 5b.
- the first actuator 20 is composed of a cylinder hole 21 drilled on one side of the piston inner 5a in parallel with the biston pin 6, and a first movable lifting member 1!
- a pressure receiving pin 14a protruding from the lower surface of the cylinder hole 21 and extending through the long hole 54 penetrating the upper wall of the intermediate portion of the cylinder hole 21 to face the tip of the cylinder hole 21.
- the slots 5 4 is adapted to the pressure receiving pin 1 4 a is not prevented from moving between the non-raised position A and the raised position B together with the first movable raising member 1 4 x.
- An operating plunger 23 and a return plunger 24 are slidably fitted in the cylinder hole 21 with the pressure receiving pin 14a interposed therebetween.
- the return plunger 24 has a cylindrical shape with a bottom, and a cylindrical retainer 52 fixed to the open end of the cylinder hole 21 with a retaining ring 53 is inserted into the return plunger 24. Between the retainer 52 and the return plunger 24, a coil-shaped return spring 27 for urging the return plunger 24 toward the pressure receiving pin 14a is contracted.
- a hydraulic chamber 25 facing the inner end of the operating plunger 23 is defined in the cylinder hole 21. When the hydraulic pressure is supplied to the hydraulic chamber 25, the operating plunger 23 receives the hydraulic pressure and receives the pressure receiving pin. 1st movable lifting member via 1 4a 1 4!
- the non-raised position A is defined by the actuation plunger 23 pressed by the pressure receiving pin piece 14a abutting the bottom surface of the cylinder hole 21 (see Fig. 6).
- the raised position B of the first movable lifting member 14i is defined by the return plunger 24 pressed by the pressure receiving pin piece 14a abutting the retainer 52 (Fig. 1). 2 and Fig. 16).
- the first and second Akuchiyue Ichita 2 0, 2 0 2 the combustion pressure in the combustion chamber 4 a, the compression pressure of the mixture, the inertial force and the Pisutonau evening 5 b, Pisutonau evening 5 b is Shirindapoa 2 a
- the piston outer 5b is allowed to move between the low compression ratio position L and the high compression ratio position H due to the natural external force acting to separate or approach the compression direction.
- a piston-auter locking means 3 for locking the piston outer 5b at three positions of a low compression ratio position L, a medium compression ratio position M, and a high compression ratio position H. 0 is provided.
- the piston lock mechanism 30 will be described with reference to FIGS. 2, 4, 5, and 9 to 20E.
- the first and third engagement grooves 3 1 chi, 3 1 3 are arranged in the same phase, a second locking groove 3 1 2, the first and third locking groove 3 1 chi, 3 1 3 part While being overlapped with each other, they are displaced from the first and third locking grooves 31 and 313 in the circumferential direction of the piston auter 5b, and are placed.
- the piston inner 5 a the outer peripheral wall of a pair arranged so as to sandwich the piston pin 6 extends in the circumferential direction each housing groove 2 8, 2 8 2 are provided upper and lower sets, receiving grooves of each lower 28, the first locking lever 32 is swingably attached to the piston inner 5a via a pivot shaft 33 parallel to the axis of the piston inner 5a.
- the second locking lever 3 2 2 is swingably attached to the piston inner 5 a via the pivot 33.
- First and second locking lever one 3 2 E, 3 2 2 is provided with a long arm 3 2 a and the short arm 3 2 b extending in opposite directions from the swinging center, the first locking lever The long arm 3 2 a and the short arm 3 2 2 b of the second locking lever 3 2 2 can be engaged with the second locking groove 3 1 2 , and the first locking lever 3 2 x short arm 3 2! b and the long arm 3 2 2 a of the second locking lever 3 2 2 are engageable respectively with the first and third locking groove 3 1, 3 1 3.
- the first and second locking lever 3 2, 3 2 2 swings them individually First and second drive means 3 9, 3 9 2 is connected.
- the first driving means 39 is a lower accommodation groove 28!
- a coil-shaped operating spring mounted between the bottom and the long arm 3 2a of the first locking lever 32 to bias the long arm 32a in the direction of engagement with the second locking groove 312.
- 3 4 and a second locking groove 3 1 b which is fitted into a cylinder hole 36 formed in the piston inner 5 a and is inserted into the tip of the second arm 32 b of the first locking lever 32.
- a hydraulic piston 38 which comes into contact with the side to press against.
- a positioning projection 35 is formed on the long arm 32a of the first locking lever to prevent the operation spring 34 from being deflected.
- a hydraulic chamber 37 is defined in the cylinder bore 36 so that the inner end of the hydraulic piston 38 faces.
- the cylinder hole 36 of the piston inner 5a is cut out on both sides of the accommodation grooves 28 ⁇ and 282 and opens to the outer peripheral surface of the piston inner 5a.
- each locking lever one 3 2, 3 2 A notch 55 for receiving the tip of the short arm 32 2 2 b, 32 2 b is provided. Therefore, even if a part of the hydraulic piston 38 is exposed in the housing groove 28, the hydraulic piston 38 can be supported on the inner peripheral surface of the cylinder hole 36 over its entire length, and the hydraulic piston 38 can be supported.
- the load of the second arm 32b acts on the intermediate point in the axial direction of the hydraulic piston 38, so that the operation of the hydraulic piston 38 can be stabilized.
- Second driving means 3 9 since the first driving means 3 is 9 x basically the same configuration, reference identical to corresponding parts to the first drive means 3 9 of the second drive means 3 9 2 The reference numerals are used, and the detailed description is omitted.
- the I 3 4 if operated urges the long arm 3 We a first locking lever 3 2 ⁇ the direction of engagement with the third locking groove 3 1 3, the hydraulic piston 3 8 when receiving the hydraulic pressure, so as to press the short arm 3 2 2 b of the second locking lever 3 2 2 in the engagement direction with the second locking groove 3 1 2.
- the first engaging means is actuated by the urging force of the operating spring 34.
- the long arm 3 2 a of the stop lever 3 2 is engaged with the second locking groove 3 1 2 , and By abutting the lower surface of the engaging groove 3 1 2, it is possible to lock the Pisutonauta 5 b to the low compression ratio position L.
- the first driving means 39 supplies hydraulic pressure to the hydraulic chamber 37 to operate the hydraulic piston 38, and the first locking lever-32 x
- the short arm 3 Sb is engaged with the first locking groove 31 and is brought into contact with the upper surface of the locking groove 31, and at the same time, the hydraulic pressure is supplied from the hydraulic chamber 37 to the second driving means 39 2.
- to release the a second latching lever 3 2 2 long arm 3 2 2 a engages with the third engagement groove 3 1 3 by the biasing force of the operating spring 3 4, and engaging grooves 3 1 3
- the piston auter 5b can be locked at the middle compression ratio position M.
- Pisutonauta 5 b When Pisutonauta 5 b has come at a high compression ratio position H, actuates the hydraulic piston 3 8 and supplies the hydraulic pressure to the second hydraulic chamber 3 7 horses ku motion means 3 9 2, the second locking lever one 3 2 2 short arm 3 2 2 b engaged with the second locking groove 3 1 2, and by abutting the upper surface of the engaging groove 3 1 2, Pisutonauta 5 b of the stopper ring 1 8 piston By contacting the lower end surface of the inner 5a, the piston 5b can be locked at the high compression ratio position H.
- a cylindrical first partition partitioned by a partition wall 6 a is provided between the piston pin 6 and a sleeve 40 press-fitted into its hollow portion.
- the second oil chambers 4 1 ⁇ and 4 1 2 are defined.
- the first oil chamber 41 has a plurality of first lateral holes 43 at one end of the piston pin 6 and a first annular oil passage 48!
- the first and second oil chambers 4 1 E, the 4 1 2, the piston pin 6, the connecting rod 7 and crank shaft 9 to over provided are first and second oil passage 4 4 3_, 4 4 2 pixels Resolution are connected, the first and second oil passage 4 4, 4 4 2, each of the first and second electromagnetic switching valve 4 5 ⁇ , 4 5 2 via a common hydraulic source serving oil pump It is switchably connected to 46 and oil sump 47.
- the first and second Akuchiyue Isseki 2 0; L, 2 0 in both 2 also, the return plunge catcher 2 4, 2 4 return spring 2 7, the pressure receiving pin 1 by 2 7 the biasing force of 4 a, 1 4 x b through the first and second movable raising member 1 4! , 14 2 to each non-raising position A.
- the first and second drive means 3 9, 3 9 in both 2 also, operating spring 3 4, 3 first and second locking lever one 3 4 is pivotally supported on the piston inner 5 a at its urging force 2, 3 2 2 long arm 3 2 E a, 3 2 2 a biasing to the inner peripheral surface side of the Pisutonauta 5 b.
- the long arm 3 2 2 a of the second locking lever 3 2 2 engages with the third engagement groove 3 1 3 Bisuton'in'na 5 a comprises the transition to the compression ratio state in the following.
- Short arm 3 2 2 b of this city-out second locking lever one 3 2 2 also leave the inside of the piston inner 5 a.
- a rotational force in the direction of the raising position B is applied to the first movable raising member 14 via the pressure receiving pin 14a.
- the hydraulic piston 38 is moved by the hydraulic pressure in the hydraulic chamber 37 to the first locking lever 32! While pressing the short arm 32b of the arm toward the inner peripheral surface of the piston inner 5a, the long arm 32 23a is retreated to the inside of the piston inner 5a.
- piston piston 5b can be moved to medium compression ratio position M.
- the piston 5b moves to the middle compression ratio position M when it receives the following natural external force. That is, when the piston negative 5b is drawn toward the combustion chamber 4a by the negative pressure of the intake air during the intake stroke of the engine, or between the piston ring 10a to 10c and the inner surface of the cylinder pore 2a during the downward stroke of the piston 5. If the piston rotor 5b is left behind the piston inner 5a due to frictional resistance, In the second half of the ascent stroke of 5, when the piston rotor 5b tries to lift up from the piston inner 5a due to its inertia due to the deceleration of the piston rotor 5a, the piston rotor 5b rises with respect to the piston inner 5a.
- the third locking groove 3 1 2 is inserted into the long arm 3 2 2 a of the second locking lever 3 2 2 already engaged with the third locking groove 3 1 3.
- the abutment of the lower surface of 3 prevents the piston rotor 5b from rising beyond the medium compression ratio position M.
- the first locking lever 3 2! Since the positions of the short arm 32 b and the first locking groove 31 1 ⁇ match, the hydraulic piston 38 of the first driving means 39 presses the inner surface of the piston inner 5 a.
- the short arm 3 2 ⁇ b of the first locking lever 32 engages with the first locking groove 3 13. Contact the upper surface of Therefore, the first locking lever 3 2!
- the piston rotor 5b is held at the medium compression ratio position M, and the first cam mechanism 15! Pushing force from the upward cam 1 5 E a and down the cam 1 5 ⁇ b and are as soon disengage the mutual viewed ⁇ first movable raising member 1 4 x first Akuchiyue Isseki 2 0 E actuating plunger 2 3 of To the raised position B.
- the upward cam 15a and the downward cam 15b of the first cam mechanism 15 are brought into contact with each other's peaks, and the piston 5a is brought into the middle compression ratio. Hold firmly in position M.
- the first driving means 3 9 3 But, while pressing the hydraulic piston 3 8 towards the short arm 3 2 2 b of the second locking lever one 3 2 2 on the inner circumferential surface of the piston inner 5 a by the hydraulic pressure of the hydraulic chamber 3 7, the Nagaaichi dismissing the arm 3 2 2 a inwardly of the piston inner 5 a. As a result, the piston counter 5b can be moved to the high compression ratio position H.
- the piston outer 5b rises toward the high compression ratio position H under the same natural external force as when it moved to the middle compression ratio position M.
- the stopping ring 18 at the lower end of the piston rotor 5b is the piston inner.
- piston piston 5b stops rising at a predetermined high compression ratio position H.
- the short arm 3 2 2 b and the second drive means 3 9 by the pressing force of the second hydraulic piston 3 8 engages the second locking groove 3 1 2, and abuts against the upper surface of the groove 3 1 2.
- Pisutonau evening 5 b is, the stopper ring 1 even when subjected to reaction with shocking abutment 8 to the piston inner 5 a lower end face of the short arm 3 2 2
- the reaction second locking lever one 3 2 2 The support by b prevents the piston 5b from rebounding from the high compression ratio position H, and can accurately maintain it at the high compression ratio position H.
- the second cam mechanism 1 5 similar to the first cam mechanism 1 5 ⁇ upward cam 1 5 2 a and the mountain portion of the downward cam 1 5 2 b
- the top faces are abutted against each other, and the piston rotor 5b is firmly held at the high compression ratio position H.
- the piston inner and Auta 5 a, 5 b is a compression ratio together with enhanced maximum raising and lowering the Shirindapoa in 2 a.
- the piston outer 5b When controlled to the low compression ratio position L, the medium compression ratio position M, and the high compression ratio position H, the piston outer 5b is formed on the mating surface of the piston inner 5a and the piston outer 5b and slides with each other. Since the rotation with respect to the piston inner 5a is restricted by the spline teeth 11a and the spline grooves 11b which freely engage, the top shape of the piston 5b facing the combustion chamber 4a is changed to the combustion chamber 4a. The compression ratio at the high compression ratio position H of the piston 5b can be effectively increased in accordance with the shape of.
- the large thrust received by the piston rotor 5b from the combustion chamber 4a during the expansion stroke of the engine is reduced by the first force mechanism 15 and / or or the second cam mechanism 1 5 2 upward cam 1 5 a, 1 5 2 a and acting perpendicular to the flat top surface of the crest abut one another with the downward cam 1 5 ⁇ b, 1 5 2 b since becomes not that the first movable raising member 1 4 and / or the second movable raising member 1 4 ⁇ is rotated by ⁇ force, thus the first and second Akuchiyue Isseki 2 0, 2 0 2
- the hydraulic pressure supplied to the hydraulic chambers 25, 25 does not need to be high enough to withstand the thrust, and even if there are a few bubbles in the hydraulic chambers 25, 25, the piston Can be stably held at the middle compression ratio position M and the high compression ratio position H, so there is no problem.
- the piston 5 moves between the low compression ratio position L, the medium compression ratio position M, and the high compression ratio position H during the reciprocation of the piston 5 during the reciprocation of the piston 5 and the piston 5a, 5b. in, because it utilizes the natural external forces acting trying them closer or moved away in the axial direction, the first and second Akuchiyue Isseki 2 0, 2 0 2 the first and second movable raising member 1 4 E, 1 4 2, will be sufficient to exert the output of only by rotating between each simply non raised position a and the raised position B, a small volume of the first and second Akuchiyue Ichita 2 0 and smaller I spoon Can be achieved.
- the frictional resistance between the piston ring 10a to 10c and the inner surface of the cylinder pore 2a and the inertial force of the piston outer 5b are particularly effective.
- the above frictional resistance has a relatively small change with respect to the change in the engine speed
- the inertia force of the piston 5b increases in a quadratic curve as the engine speed increases. Therefore, the frictional resistance described above is dominant in the low engine speed range and the inertia force of the piston tower 5b is high in the high engine speed range, as opposed to the position change of piston piston 5b.
- the hydraulic chamber 25 of the first factory 200 and the hydraulic chamber 37 of the first driving means 39:! _ Are provided with a common first electromagnetic switching valve 45!
- the oil pump 4 6 and sump 4 7 switchable connected to The second Akuchiyue Isseki 2 0 2 of the hydraulic chamber 2 5 and the second drive means 3 9 2 of the hydraulic chamber 3 7 via the common since the switchably connected to the oil pump 4 6 and sump 4 7 via the second electromagnetic switching valve 4 5 2, with a common hydraulic both Akuchiyue Isseki 2 0 ⁇ , 2 0 2 and two driving means 3 9, 3 9 2 reasonably activates the can simplify the hydraulic circuit can provide an inexpensive variable compression ratio device.
- first and second Akuchiyue Isseki 2 0 E 2 0 each actuation of the 2 and the return plunger 2 3, 2 4 of Jikuizumi crosses the axis of the pressure receiving pin 1 4 a, a radial line of the pivot shaft 1 9 because are arranged to intersect at a substantially right angle with respect to the actuating ⁇ 3 returns the plunger 2 3, 2 4 of the pressing force via the pressure receiving pin 1 4 the first and second movable raising member 1 4, 1 4 2 It is efficiently transmitted can, first and second Akuchiyue Isseki 2 0 E, can contribute to downsizing of the 2 0 2.
- each end face of each actuating and returning plunger 23, 24 and the cylindrical outer peripheral surface of the pressure receiving pin 14a are in linear contact, the contact area is relatively large, and the contact pressure is reduced. It can contribute to improvement of durability.
- first and second cam mechanisms 1 5 E, 1 5 2 of one side surface of each crest portion, the first and second movable raising member 1 4! , 1 4 2 slopes 5 8 a, 5 8 b to slide so away axially from each other when rotated from the non-raised position A to bulk up position B; except formed into 5 9 a, 5 9 b
- the configuration is the same as that of the previous embodiment.
- the parts corresponding to those of the previous embodiment are denoted by the same reference numerals, and the description thereof is omitted.
- the pitch of each mountain is wider than in the previous embodiment, and each movable raising member 14! , 1 4 2 of the working stroke angle is increased, also natural external force becomes to decrease the area of the top surface of each crest, moved to medium compression ratio position M or high compression ratio position H of Pisutonau data 5 b Even if is weak, the first and second movable raising members 14!
- the present invention is not limited to the above embodiment, and various design changes can be made without departing from the gist of the present invention.
- the piston rotor 5b is controlled in four stages of a low compression ratio position, a first middle compression ratio position, a second middle compression ratio position, and a high compression ratio position by adding a mode of rotating the piston to the raised position B.
- the first and second electromagnetic switching valve 4 5, 4 5 2 operating mode is not permissible even if the reverse of the above embodiment. That is, each switching valve 4 5 E, 4 5 first in the non-energized state 2 and the second oil passage 4 4, 4 4 2 was connected to the oil pump 4 6, the oil passage 4 4 energized, 4 4 2 Can also be connected to the sump 47.
- first drive motion means 3 9 x while setting the set load of the operating spring 3 4 weaker than the set load of the second driving means 3 9 2 of the working spring 3 4, first and second oil passage 4 4 I, 4 4 2 Are combined into one common oil passage.
- one common switching valve is provided in this common single oil passage, and the oil pressure of the oil passage is set to 1st actuator.
- a hydraulic control unit for a first hydraulic capable hydraulic drive may control the second Akuchiyue Isseki 2 0 2 and a second driving means 3 9 2 and a second hydraulic pressure that can hydraulically driven, easy first and second Akuchiyue Isseki 2 0, 2 0 2 sequential work movement, and the first and second drive means 3 9, 3 9 2 of sequentially performing the operation leaves at the a hydraulic circuit.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/523,692 US7284512B2 (en) | 2002-08-05 | 2003-08-04 | Compression ratio variable device of internal combustion engine |
| DE60333846T DE60333846D1 (de) | 2002-08-05 | 2003-08-04 | Vorrichtung eines verbrennungsmotors mit variablem verdichtungsverhältnis |
| AU2003252367A AU2003252367A1 (en) | 2002-08-05 | 2003-08-04 | Compression ratio variable device of internal combustion engine |
| EP03766719A EP1541849B1 (en) | 2002-08-05 | 2003-08-04 | Compression ratio variable device of internal combustion engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002227790A JP3975132B2 (ja) | 2002-08-05 | 2002-08-05 | 内燃機関の圧縮比可変装置 |
| JP2002-227790 | 2002-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004013480A1 true WO2004013480A1 (ja) | 2004-02-12 |
Family
ID=31492224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/009856 Ceased WO2004013480A1 (ja) | 2002-08-05 | 2003-08-04 | 内燃機関の圧縮比可変装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7284512B2 (ja) |
| EP (1) | EP1541849B1 (ja) |
| JP (1) | JP3975132B2 (ja) |
| AU (1) | AU2003252367A1 (ja) |
| DE (1) | DE60333846D1 (ja) |
| WO (1) | WO2004013480A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1503060A1 (en) * | 2003-07-31 | 2005-02-02 | HONDA MOTOR CO., Ltd. | Internal combustion engine variable compression ratio system |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460638C (zh) * | 2006-06-30 | 2009-02-11 | 陈永清 | 引擎 |
| GB0617726D0 (en) * | 2006-09-08 | 2006-10-18 | Atalla Naji A | Device (modifications) to improve efficiency of internal combustion engines |
| US7685974B2 (en) * | 2007-10-31 | 2010-03-30 | Ford Global Technologies, Llc | Variable compression ratio engine with isolated actuator |
| DE102010041103A1 (de) * | 2010-09-21 | 2012-03-22 | Bayerische Motoren Werke Aktiengesellschaft | Kolben für eine Hubkolben-Brennkraftmaschine |
| US9546733B2 (en) * | 2010-12-27 | 2017-01-17 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Piston |
| KR101461889B1 (ko) | 2013-02-28 | 2014-11-17 | 현대자동차 주식회사 | 가변 압축비 장치 및 이를 포함하는 내연기관 |
| KR101518945B1 (ko) * | 2013-12-11 | 2015-05-12 | 현대자동차 주식회사 | 압축비를 가변시키는 가변 압축비 엔진 |
| KR101500392B1 (ko) * | 2013-12-13 | 2015-03-09 | 현대자동차 주식회사 | 가변 압축비 장치 |
| JP6727758B2 (ja) * | 2015-03-31 | 2020-07-22 | 三菱重工業株式会社 | 連接棒およびこれを備えたクロスヘッド型エンジン |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS63131839A (ja) * | 1986-11-19 | 1988-06-03 | Yanmar Diesel Engine Co Ltd | 内燃機関用ピストン |
| JPS63143342A (ja) * | 1986-12-05 | 1988-06-15 | Mazda Motor Corp | エンジンの圧縮比可変装置 |
| JPH06212993A (ja) * | 1993-01-18 | 1994-08-02 | Mitsubishi Motors Corp | エンジンの可変圧縮比装置 |
| WO2002103178A1 (fr) * | 2001-06-15 | 2002-12-27 | Honda Giken Kogyo Kabushiki Kaisha | Variateur de rapport de compression de moteur a combustion interne |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE461459C (de) * | 1926-08-03 | 1932-02-09 | Erich Schweter Dipl Ing | Einrichtung zur Veraenderung des Verdichtungsraums |
| US3704695A (en) * | 1970-07-02 | 1972-12-05 | Teledyne Ind | Valve construction for variable compression ratio piston |
| GB2084291B (en) * | 1980-05-13 | 1984-01-11 | Ritchie Norman Stinson | Variable capacity internal combustion engine |
| US4809650A (en) * | 1986-10-09 | 1989-03-07 | Nissan Motor Co., Ltd. | Variable compression control arrangement for internal combustion engine |
| US4934347A (en) * | 1987-06-18 | 1990-06-19 | Nissan Motor Co., Ltd. | Variable compression piston arrangement for internal combustion engine |
| US4864977A (en) * | 1987-07-03 | 1989-09-12 | Honda Giken Kogyo Kabushiki Kaisha | Compression ratio-changing device for internal combustion engines |
| JPH07113330B2 (ja) * | 1987-07-16 | 1995-12-06 | 日産自動車株式会社 | 内燃機関の圧縮比可変装置 |
| DE4041637C1 (ja) * | 1990-12-22 | 1992-04-09 | Mtu Friedrichshafen Gmbh | |
| JP2669451B2 (ja) | 1993-10-18 | 1997-10-27 | 鹿島建設株式会社 | 建物躯体のプッシュアップ装置 |
| JPH11117779A (ja) | 1997-10-15 | 1999-04-27 | Toyota Motor Corp | 内燃機関の可変圧縮比機構 |
| US6289857B1 (en) * | 2000-02-23 | 2001-09-18 | Ford Global Technologies, Inc. | Variable capacity reciprocating engine |
| JP4104388B2 (ja) * | 2002-07-12 | 2008-06-18 | 本田技研工業株式会社 | 内燃機関の圧縮比可変装置 |
| JP4084718B2 (ja) * | 2003-07-31 | 2008-04-30 | 本田技研工業株式会社 | 内燃機関の圧縮比可変装置 |
-
2002
- 2002-08-05 JP JP2002227790A patent/JP3975132B2/ja not_active Expired - Fee Related
-
2003
- 2003-08-04 EP EP03766719A patent/EP1541849B1/en not_active Expired - Lifetime
- 2003-08-04 US US10/523,692 patent/US7284512B2/en not_active Expired - Fee Related
- 2003-08-04 WO PCT/JP2003/009856 patent/WO2004013480A1/ja not_active Ceased
- 2003-08-04 DE DE60333846T patent/DE60333846D1/de not_active Expired - Lifetime
- 2003-08-04 AU AU2003252367A patent/AU2003252367A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63131839A (ja) * | 1986-11-19 | 1988-06-03 | Yanmar Diesel Engine Co Ltd | 内燃機関用ピストン |
| JPS63143342A (ja) * | 1986-12-05 | 1988-06-15 | Mazda Motor Corp | エンジンの圧縮比可変装置 |
| JPH06212993A (ja) * | 1993-01-18 | 1994-08-02 | Mitsubishi Motors Corp | エンジンの可変圧縮比装置 |
| WO2002103178A1 (fr) * | 2001-06-15 | 2002-12-27 | Honda Giken Kogyo Kabushiki Kaisha | Variateur de rapport de compression de moteur a combustion interne |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1503060A1 (en) * | 2003-07-31 | 2005-02-02 | HONDA MOTOR CO., Ltd. | Internal combustion engine variable compression ratio system |
| US6966282B2 (en) | 2003-07-31 | 2005-11-22 | Honda Motor Co., Ltd. | Internal combustion engine variable compression ratio system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3975132B2 (ja) | 2007-09-12 |
| EP1541849A1 (en) | 2005-06-15 |
| DE60333846D1 (de) | 2010-09-30 |
| EP1541849A4 (en) | 2009-12-23 |
| JP2004068682A (ja) | 2004-03-04 |
| US20060102115A1 (en) | 2006-05-18 |
| AU2003252367A1 (en) | 2004-02-23 |
| US7284512B2 (en) | 2007-10-23 |
| EP1541849B1 (en) | 2010-08-18 |
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