EP0694117A1 - Verbrennungsmotor mit kraftstoff-einspritzung - Google Patents
Verbrennungsmotor mit kraftstoff-einspritzungInfo
- Publication number
- EP0694117A1 EP0694117A1 EP94914353A EP94914353A EP0694117A1 EP 0694117 A1 EP0694117 A1 EP 0694117A1 EP 94914353 A EP94914353 A EP 94914353A EP 94914353 A EP94914353 A EP 94914353A EP 0694117 A1 EP0694117 A1 EP 0694117A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocker arm
- pump
- oil
- oil pump
- internal combustion
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 22
- 239000007924 injection Substances 0.000 title claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 12
- 239000000446 fuel Substances 0.000 title claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 33
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 239000010687 lubricating oil Substances 0.000 claims description 5
- 238000005461 lubrication Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
- F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Definitions
- the invention relates to an internal combustion engine with fuel injection, in particular a single-cylinder diesel engine, in which a rocker arm is actuated via a camshaft for driving the injection pump.
- the task is to simplify the design of the engine, with the universal use of the cam drive being in the foreground.
- a proposal according to the invention for solving the above object is that a pretensioned compression spring is also supported on the rocker arm, which holds the scanning point of the 'rocker arm on the cam and that the rocker arm end of the compression spring is accommodated in a hollow cylinder which forms the piston of an oil pump.
- the compression spring for the rocker arm serves the further purpose of extending the piston of an oil pump out of the pump cylinder during the suction stroke of the pump, so that oil can be sucked into the pump, which oil comes out of the pump during the subsequent delivery stroke a connected lubricating oil channel is promoted.
- the pump piston is retracted into the pump cylinder by the cam of the camshaft against the compression spring.
- an injection pump with a pump plunger without a return spring can be used in a further simplification of the engine design, the end of which instead has a driver the rocker arm is coupled.
- the invention further comprises an oil pump in an internal combustion engine, the pump piston of which is resiliently supported with respect to the associated pump cylinder and via a rocker arm driven by the engine camshaft.
- the rocker arm also serves to drive the injection pump.
- the stamp of the injection pump is supported at one end of the rocker arm and at the other end on the side of the pump piston opposite the stamp.
- the oil pump is expediently designed such that the pump cylinder is connected to an oil container via a suction valve and to a lubricating oil channel via a pressure valve.
- the pump cylinder is expediently arranged in such a way that the suction valve opens directly into the sump of the oil pan.
- the invention further comprises a rocker arm on an internal combustion engine, with a sampling point which interacts with a cam of the camshaft of the engine, and with two further sampling points for actuating an oil pump for engine lubrication on the one hand and a further auxiliary drive on the other hand, at least one pretensioned spring counteracting the cam movement being provided.
- this spring can be formed by a spring-loaded piston of the oil pump.
- the auxiliary drive can be formed by the injection pump of the engine.
- the plunger spring of the injection pump can be used instead of the compression spring.
- the piston of the oil pump is pivotally connected to the associated end of the rocker arm.
- pivot axis of the rocker arm is arranged between its end actuating the auxiliary drive and its cam-side scanning point. This arrangement ensures a particularly compact design, in particular when the injection pump is provided as a secondary drive. Such a construction is preferably used on a single-cylinder small diesel engine.
- the drawing shows a partial cross section through a single-cylinder diesel engine in the area of the camshaft 1.
- This has a single cam 2, which is used on the one hand for the actuation.
- the rocker arm 3 with which the valve tappets for the inlet and the outlet valve are controlled, on the other hand for the actuation of a rocker arm 5, with which the injection pump 6 is controlled.
- This sits with its pump cylinder 7 directly in a corresponding bore of the cylinder head 8, in which the corresponding channels for the fuel flow are incorporated, namely a channel 9 for the fuel supply and a channel 10 for the fuel return.
- a connection thread 12 is provided at the upper end of the pump head 11 for connecting the pressure line.
- the pump ram 13 is connected with its rocker arm end 14 via a driver 15 to a scanning roller 17 mounted on the shaft 16.
- the rocker arm 5 for actuating the injection pump 6 can be pivoted about a rocker arm pivot axis 20.
- the contact between the scanning roller 18 and the cam 2 of the camshaft 1 is ensured by a prestressed compression spring 22, which is attached to an extended end 21 of the rocker arm 5 and which simultaneously forms the tension spring of an oil pump 23.
- the oil pump 23 has a hollow cylindrical piston ben 24, in which the upper end of the Druckfe ⁇ the 22 is received; the lower end thereof is supported against a valve body 25 which is fastened in the interior of a housing 26 serving as a pump cylinder by means of a snap ring 27.
- the valve body 25 forms, together with a valve ball 28, which sits over an opening 29 of the valve body 25, a suction valve. Oil is sucked into the interior of the pump cylinder 26 through an opening 29 from an underlying oil sump of the oil pan according to arrow 3, while the piston 24 is moved out of the pump cylinder 26 by the compression spring 22.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4312393 | 1993-04-16 | ||
| DE4312393A DE4312393C2 (de) | 1993-04-16 | 1993-04-16 | Kipphebel für Einspritz- und Ölpumpe |
| PCT/EP1994/001096 WO1994024421A1 (de) | 1993-04-16 | 1994-04-08 | Verbrennungsmotor mit kraftstoff-einspritzung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0694117A1 true EP0694117A1 (de) | 1996-01-31 |
| EP0694117B1 EP0694117B1 (de) | 1996-10-23 |
Family
ID=6485580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94914353A Expired - Lifetime EP0694117B1 (de) | 1993-04-16 | 1994-04-08 | Verbrennungsmotor mit kraftstoff-einspritzung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0694117B1 (de) |
| AU (1) | AU6677094A (de) |
| DE (2) | DE4312393C2 (de) |
| WO (1) | WO1994024421A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5957673A (en) * | 1993-03-11 | 1999-09-28 | Motorenfabrik Hatz Gmbh & Co. Kg. | Injection pump for diesel engines |
| SE501026C2 (sv) * | 1993-03-17 | 1994-10-24 | Volvo Ab | Bränsleinsprutningsanordning för förbränningsmotorer |
| GB2531538A (en) * | 2014-10-20 | 2016-04-27 | Gm Global Tech Operations Llc | Internal Combustion Engine Comprising a fuel unit pump actuated by a camshaft |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1521267A (en) * | 1922-07-17 | 1924-12-30 | Lawrence W Andrews | Oil pump |
| DE694245C (de) * | 1935-04-11 | 1940-07-27 | Junkers Flugzeug -und Motorenwerke Akt.-Ges. in Dessau. | Anordnung der Einspritzpumpen von Brennkraftmaschinen |
| DE697009C (de) * | 1937-06-08 | 1940-10-03 | Friedrich Deckel Praez S Mecha | Einspritzpumpe fuer Brennkraftmaschinen, Schmierung |
| DE717647C (de) * | 1937-06-25 | 1942-02-19 | Kloeckner Humboldt Deutz Ag | Hilfspumpensatz fuer Zweitaktbrennkraftmaschinen |
| US2955582A (en) * | 1957-06-21 | 1960-10-11 | Gen Motors Corp | Timed fuel injection system |
| FR1359272A (fr) * | 1963-03-13 | 1964-04-24 | Renault | Combinaison d'une pompe à huile auxiliaire et d'une pompe à essence d'automobile |
| DE2037117A1 (de) * | 1969-09-18 | 1971-04-01 | VEB Barkas Werke, χ 9000 Karl Marx Stadt | Kraftstoffeinspritzpumpe fur mehrzylindnge Brennkraftmaschinen |
| DE2723969C2 (de) * | 1977-05-27 | 1983-02-17 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Kraftstoffeinspritzpumpe für Brennkraftmaschinen |
| GB2090911B (en) * | 1980-11-28 | 1984-06-27 | Yanmar Diesel Engine Co | Overhead cam type diesel engine |
-
1993
- 1993-04-16 DE DE4312393A patent/DE4312393C2/de not_active Expired - Fee Related
-
1994
- 1994-04-08 DE DE59400917T patent/DE59400917D1/de not_active Expired - Fee Related
- 1994-04-08 WO PCT/EP1994/001096 patent/WO1994024421A1/de not_active Ceased
- 1994-04-08 EP EP94914353A patent/EP0694117B1/de not_active Expired - Lifetime
- 1994-04-08 AU AU66770/94A patent/AU6677094A/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9424421A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6677094A (en) | 1994-11-08 |
| EP0694117B1 (de) | 1996-10-23 |
| DE4312393C2 (de) | 1996-08-29 |
| WO1994024421A1 (de) | 1994-10-27 |
| DE59400917D1 (de) | 1996-11-28 |
| DE4312393A1 (de) | 1994-10-20 |
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