JPS5963366A - Ignition timing controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ignition timing control device for use in an engine.

When an engine, for example a ganolino engine, is installed on a vehicle, it is necessary to adjust the output depending on the running condition of the vehicle, and the trouble of adjusting it with a carburetor that is suitable for the mixture is often used. . In this case, the mixture flowing into the combustion chamber through the carburetor has a proper ignition of 0;
According to the rule, Rakuhisa J] emits more appropriate output than Roko and K. Parable d, regular line 1. B's Fugino has good combustion efficiency and an appropriate advance angle, and it operates greatly and generates output. In contrast, the engine in idle state (J does not operate only to stabilize its rotation, but in particular, the purpose of lowering the temperature range of υ1 and reducing nitrogen oxides (NOx) is also added, However, if the 1.0 H4 period is kept at a retarded angle, combustion efficiency will be poor and fuel efficiency will deteriorate.

By the way, even though the engine speed is relatively high, the engine brake is used to keep the throttle valve opening σ) small during deceleration.

During this deceleration, the combustion pressure P in the combustion chamber is as shown in Figure 1.
When Jl is kept small and the engine is rapidly accelerated, the throttle valve opens too much and the combustion pressure P increases rapidly. If the combustion pressure P changes discontinuously in this way, it will cause problems and is not desirable, and it is desirable to change the combustion pressure P smoothly.

In addition to retarding the ignition 1 information of this invention 4 to warn of deceleration, the ignition o3 at idle. The purpose is to provide a small fire control device that advances the ribs.

The ignition 0 ill old IIJ fall device according to this invention is
Advance or retard engine ignition timing? It is something that stirs fJ+, and it is near T10F111 on the throttle valve of the carburetor]
The advance side negative pressure chamber is communicated with the advance side negative pressure chamber through the air passage, and the retard side negative pressure chamber is arranged so that the advance side negative pressure chamber and the two movable partitions face each other. A two-way trace intake valve equipped with a throttle (communicated with the manifold, where the engine speed is below the set order and the intake manifold negative pressure is above the set value, the intake manifold negative pressure is advanced to the idle field). A cut-off KR valve leading to the negative pressure chamber is installed in the first air passage, and the advance-side negative pressure chamber receives intake manifold negative pressure at idle to advance the ignition timing and close the intake manifold at high speed. The configuration is such that the small flame timing is retarded by the negative pressure chamber on the advance side provided with a spacer.According to such an ignition [1', i %: Ll control device, the ignition timing at idle is advanced. Therefore, the total fuel efficiency is J1, and moreover.

By retarding the ignition timing at 71J speed, when performing sudden acceleration following kneading, the throttle of the first and second air passages is increased by φ11,
The ignition timing gradually advances toward the advanced side, making it possible to suppress sudden changes in combustion pressure.

The present invention will be described below with reference to the accompanying drawings.

)・Figure 2 shows the invention σ) - As an example of actual rotation, the φ fire timing control system is shown. This ignition timing control 111i1
The loading is near the upstream side of the throttle valve 3 of the carburetor 2 (D
The negative pressure of the mixture at (shown as the position), ν1j.

Disboost negative pressure and the upstream side of the throttle valve 3 ((F
The negative pressure of the air-fuel mixture in the intake manifold 4 is ``u1'', which is the position of the intake manifold negative IEE (
(hereinafter simply referred to as manifold negative pressure)? to operate the distributor 5. In this case, the disboost negative pressure is passed through the airway 6.

The advance side 1 negative pressure is led to the main chamber 7, the manifold negative pressure follows the 2 air path 8, and the retard angle side 1 is led to the negative control chamber 9.

Each time the two negative FFs are arranged in the case JO, they form a Makusa advance angle W'j+'']2.This vacuum advance angle W]2 and the field 7J airway 6 's Kirisenben 13 and
The first air passage 6 and the first air passage 8 with the restrictor 30 form the first air passage 8 when ignited.

[Used here]] The filter distributor 5 has a well-known structure, and the rotor 14 rotates in the direction of the upward and downward arrows.

Breaker play [5] By rotating in the direction of arrow A, the breaker operates in advance φh, and by rotating in the direction of arrow R, it operates in retardation ath.

Kai, Kashin Kakuso visit J2, speed, faith 1. The upper part of the f4 pressure chamber 7 and the upper part of the diaphragm 1 as a movable partition.
6, retard angle (Il11 Kakuda chamber 9 case) 0σ)
The lower part and the diaphragm 17 are shaped like each other. Both diaphragms J6 and J7 face each other through a hollow chamber 18, and the OR1 diaphragm J6 is connected to the breaker plate 5 through a rod J9. Size/2 diaphragm 1
7 is a hole formed in the center to loosely fit the rod 9. The upper end of the cylindrical body 20 integrated with the case JO is the second tire flamm 17.
The periphery of the hole is fixed in a sealed manner. For this reason, hollow chamber 1
8 is opened to the outside via the cylindrical body 20. ”l□] The diaphragm J6 has 21 hook pieces extending from the bottom surface,
Bottle/2 diaphragm] 7 is the hook piece 22 from the top surface 4+
I-It's out.

The tip of the hook piece 21 is bent horizontally to form a downward pressing surface 212 and an upward tension surface 212.

On the other hand, the tip of the hook piece 22 is bent into a U-shape.
Downward pressing surface 2] Upward pressing surface 221 that can come into contact with 1
Then, the upward tension surface 212 and the downward tension surface 222 which can contact each other are gently formed. Therefore, both diaphragms 16 and 17 are relatively shifted by the amount of gap between the U-shaped portions! 1
1 and exceeds the knead, they will move in the same direction. A stopper piece 2 is provided on the bottom surface of the second tire flamm J7.
3. Take A] Kira I] Te: 1.3 S, Q) Stopper piece 2
The tip of 3 protrudes into the annular groove 201 of the cylindrical body 20. Therefore, the bottle/2 diaphragm] 7 can be moved up and down within the range of 1lli8b of the annular ih-201. In fact, the advance side negative pressure chamber 7 has a spring 24 that presses the spear diaphragm 16 downward, and the retard (11) negative pressure chamber 9 has a spring 25 that presses the spear 2 diaphragm 17 upward. Equipped with fangs.

The switching valve 13 is a three-way valve that is switched by the n1/noid 13], and communicates with the negative pressure chamber 7 and the disboost board 132 that receives the disboost when it is turned off and does not receive an input signal. Shinkaku 1 boat] 3
Communicate with 3. When an input signal is received, the switching operation is performed, and the manifold port 34, which receives the manifold negative pressure, is communicated with the advance angle μ II port 133. An electric light 26 is connected in series to the no.1/noid 131 of the switching valve via the 1 and 2'2 switches 27 and 28. The switch 27 is a vacuum switch, and is turned on and off by the combination of the negative pressure in the rice room 27 and the spring 27Z. The manifold negative pressure is guided through the third air passage 29 to this negative royal chamber 271. In this case, the manifold negative pressure is 300 mm Hg or more θ) negative 13.
When the E value is reached, the bottle 11 switch 27 is turned on. Sai 2
The switch 28 is set to the engine rotation speed (16 in this case).
It is formed as a 2-inch engine rotation speed detection sensor that is turned on below (r, p, m, 00 r, p, m, etc.).

A throttle 30 is attached to the J'2 air passage 8 to apply flow resistance to the gas flowing through it. It is possible to provide a time lag to prevent this.

Mt'l' will be explained according to the operating state of the engine in which the ignition timing control device 1 shown in FIG. 2 is active.

1) Since both the disboost negative pressure and the manifold negative pressure are at atmospheric pressure when the engine is stopped, 111 and the spear 2 diaphragm) 6 and A7 are both subjected to only the elastic force of both springs 24 and 25. For this reason, both diaphragms and tooth 1 are Jl integrated hook pieces 21.22
Is the upward pressing surface 211 and the upward pressing surface 221 in contact with each other? present. In this formation, the spring 24 is set to have a smaller force than the spring 25, and the layer 12 diaphragm 1
7, the stopper piece 23 integrated with the rib is pressed against the upper end of the annular groove 20 to a position of a weight j, and the fang 1 is supported.

In this case, the first diaphragm 16 is pressed by the second diaphragm 17 through the pair of hook pieces 21, 22 and holds the rod 9 at the advance angle t.
■: Maintain X.

2) While driving (see Figure 21-1), maintain the throttle valve 3-1 at a predetermined opening (indicated by a broken line in Figure 2), and switch valve J3 to the OFF state. In this case, the disboost negative pressure and the manifold negative pressure (: 1) are approximately the same, but if the throttle valve 3 opening is large, the
As shown in the figure, when the Kakuda value is small and the Kakuda value is small, the diaphragm and the 2 diaphragm are closed as the throttle valve 30 and 1.1 degrees close more than 1 degree.
1 Ox value rises to 1, and receives this Tsunoda Memep'=//V
'Shot! ? , Tire phragm J7 is on the retard side R [Easy to move, linked to Kotob'7, Tire phragm J7 is on the retard side R
In other words, rod J9 is retarded from 3) 1・angular position circle lT11
1 Move to R and make ;6i angle Xtk low force 1^ (3
・See Figure 4).

3) During deceleration (see Figure A'5) Throttle valve 3 remains close to closed, and selector valve 3 remains off. In this case, the negative pressure value of the disboost negative rE is small, and the manifold negative pressure becomes extremely large because the engine rotates at high speed.

Then, the diaphragm J7 moves to the maximum extent until the stopper piece 23 comes into contact with the lower end of the annular groove 201. Force V (from -, moves to retard side R following the diaphragm 17,) -,
l+L, Keep the slow angle Y1 (see Figure 4).

4) During sudden acceleration after wave speed, the throttle valve 3 opens suddenly and widely (1.5
In the figure [indicated by the broken line], the manifold negative pressure decreases drastically. Therefore, the gas with low manifold negative pressure tries to flow into the high negative pressure side in the ill negative RF pipe 9 by following the A'2 air passage 8, but the flow V!h is regulated by the throttle 30. In the old case, a certain amount of time lag occurs for the high negative pressure side to return to the 1 pressure in the manifold of the low negative pressure 11. In this case, the rod 19 and the "A7" tire flamm 16 (a pair of hook pieces 2
], 22, it gradually receives the pressing force from the 212 diaphragm F, and moves to the advance angle 11111A.In addition, the 3AJ airway 6 also has an orifice 31 shown by a dashed line.
It can also be installed in a 1h square 11tllA depending on the fl.
movement can be delayed further. Through such operations, 1. The medium heat timing is 3 towards the advance angle Xt from the retard angle Y1.
3□ It fluctuates according to the one-point sentry line shown in Figure 4.

Therefore, during the rapid acceleration period tl, the ignition Fl, '+;j', rl is changed from ]00 to
300 retard, and as shown in Figure 6, the combustion pressure P rises more smoothly by 1 during deceleration sB, + a small value P, and reaches the large value P2 during acceleration. Prevents the car body from being shocked by sudden gear changes.

5) When idling (see Figure 7), the throttle valve 3 is almost closed and the switch 27 is closed.
1 and 2 switches 28 are both turned on, and the switching valve 3 remains on. For this reason, the relatively large manifold 9 cannot be guided to both the advance side '@ royal side 7 and the retard side negative pressure chamber 9, and both diaphragms 16 and 17 are connected to the springs 24 and 25 of Jl. Shift against force.

Then, the spear】Tier aphram 16 is on the advance side A,
Diaphragm] 7 is the retard angle 11111RVC sojlzoj1
One mountain and one diaphragm 16. ]7
The hook pieces 21 and 22 are drawn to each other and are balanced. In this balanced state, rod 1
9 is the movement of the diaphragm 16 to the advance side IA (LH), which advances the angle by an amount less than the amount of movement of the diaphragm 17 to the retard l1lIR, and maintains the advance angle gzl (
; see figure J-8).

When shown on the performance curve of Niassin in each region of the operating conditions mentioned above, Figure 9 cannot be obtained. Here, Fig. 4 shows the special advance angle on the m line in Fig. 9, and Fig. 8 shows the special advance angle on the n line - H.

In this way, the ignition timing control system [fB] keeps the ignition timing retarded during acceleration, so if there is sudden acceleration following this Jl, the throttle 30 will work and the ignition timing can be kept in the retard range for a long time, allowing the ignition timing to advance. It can be delayed. In order to prevent the combustion efficiency of the engine from increasing rapidly due to the kneading, the combustion pressure P is smoothly increased and changed, and it is possible to prevent the car body from becoming sluggish. Moreover, since the ignition timing at the idle (υ) is kept at the advance angle of 9111, the fuel efficiency of the idle port 4 can also be improved.

In the above-mentioned place, talent ``Nochi 27 is 3QOmm H
However, due to the manifold negative pressure of more than g, it is possible to turn on the valve.

Instead of this value, other values may be set. ■・31 to fit
2 switch 28] (inOr+p, n+, hereafter σ) The image is turned on at the engine rotation speed, but other values may be set instead of this value.

[Brief explanation of the drawing]

Fig. 1 is a combustion pressure diagram of the conventional Jl, which uses a small amount of 0-fire fFji Togetsu 11
Outline side 11 of each different J/ten situation of control device
θ 〒, Fig. 3 Figure, I -Mani Hold ＠ Pressure and Disco strip's hair / L line diagram.
The advance angle diagram is based on the line, the sword, Figure 6 is the combustion pressure curve when using the 1st f-angle of the fire timing control of Figure 2,] Figure 8 is the n in Figure 9 of the bottle. Advance angle to the right of the line # Line diagram, Figures 2 and 9.
The operating condition of the ignition timing fall 7i1NI device in Figure 2 is shown in the diagram without the range of rotation.

Claims (1)

[Claims] In the ignition timing control device that controls the engine's fine season, the throttle valve upstream of the carburetor 1/evening valve 1 is
The negative pressure chamber on the retard side is arranged so that the partition wall of the dog royal house and the dog royal house are opposite to each other, and this The slow-side negative pressure chamber is communicated with the intake manifold 1 through two air passages equipped with a throttle, and when the engine speed is below the set value and the intake manifold is idle when the intake manifold is above the set value, the intake manifold is opened. Negative rE is arranged in the first air passage with one valve, which leads to the advance angle A111 negative 132 chamber, and the advance angle S11 pressure chamber receives the intake manifold negative pressure at idle, so that the ignition speed is increased. In November, IL+ is set, and the ignition auxiliary control gear is used to retard the ignition timing and make it a special enemy for the engine.