JP3496683B2 - Transmission torque control device for internal combustion engine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear shift torque control device for an internal combustion engine for reducing a shock during gear shift of an automatic transmission.

[0002]

2. Description of the Related Art Conventionally, as a shift shock reducing device during shifting of an automatic transmission for an automobile, fuel supply to the engine is stopped in some or all cylinders, or ignition timing is retarded to control engine torque. There is a device in which the gear shift shock is mitigated by shifting the gear down (see, for example, JP-A-56-39925).

[0003]

However, in the conventional device of this type, as shown in FIG. 5 , engine torque reduction control such as fuel supply stop and ignition timing retard control is started at the same time as the engine torque reduction request timing. However, since the response delay of each torque reducing element is different, there is a problem that a good shift shock preventing function cannot be exerted especially in the vicinity of the start and end of torque reduction.

The present invention has been made in view of the above conventional problems, and controls the control timing in accordance with the characteristics of the engine torque reduction control system so as to reduce the shift shock as much as possible. An object of the present invention is to provide a torque control device for shifting the internal combustion engine.

Therefore, the first modification of the internal combustion engine according to the present invention is
The high speed torque control device is an automatic transmission with a torque converter.
The torque of the internal combustion engine connected to the
Reduction control by a plurality of torque reduction control means at high speed
In a torque control device for shifting the internal combustion engine,
Among the torque reduction control means, the response delay after the start of control is the most
Torque reduction control at required time according to response characteristics
Control of each torque reduction control means to control
And a timing control means for commonly controlling the end timing .

A second internal combustion engine gear shift according to the present invention is also provided.
The torque control device is an automatic transmission with a torque converter.
The torque of the connected internal combustion engine is changed to that of the automatic transmission.
Sometimes the torque is reduced by a plurality of torque reduction control means.
In the torque control device for shifting the combustion engine, the plurality of torque
Among the torque reduction control means, the engine torque is controlled most by control.
Although it changes significantly, the torque is changed at the required time according to the response characteristics.
So that the torque reduction control is performed.
Timing control that controls the timing of control start and end in common
And a ring control means. These first and second
Fig. 1 shows the configuration and functions of the torque control device for internal combustion engine shifting.
Show.

[0007]

[Operation] Torque reduction to reduce shock during shifting
Control means such as fuel supply stop and ignition timing retard control
There are multiple types that reduce engine torque by different methods.
If you want the most accurate control,
Engine controlled by each control according to the response characteristics of each control means
Start and start the control so that the torque is reduced at the required time.
And end timing is controlled for each torque reduction control means.
Is preferred. However, in many cases automatic transmission and engine control
Control computers are separate, and this method is controlled
Not only becomes complicated, but it may increase costs.
It

[0008]

Therefore, as a method for obtaining a sufficiently satisfactory function by relatively simple control, the first internal combustion engine torque control during shifting is described.
Like the control device, the timing control means controls the timing of starting and ending the control of each torque reduction control means in accordance with the one having the largest response delay after the start of control among the plurality of torque reduction control means. In this case, the engine torque reducing action of all the torque reduction control means acts without delay during shifting, so that a sufficiently satisfactory shift shock mitigating function can be obtained.

As another method of obtaining a sufficiently satisfactory function with a relatively simple control, a torque during shifting of the second internal combustion engine is used.
Like the control device, the timing control means controls the start and end timings of each torque reduction control means in accordance with the one in which the axial torque of the automatic transmission changes the most among the plurality of torque reduction control means. With the above configuration, since the torque reduction control means having the highest shift shock mitigating function performs the torque reduction in accordance with the required timing, a sufficiently good gear shift shock mitigating function can be obtained in this method as well.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a system configuration common to control each embodiment described later. Automatic transmission 2 on the output side of engine 1
Are connected. The automatic transmission 2 includes a torque converter 3 interposed on the output side of the engine 1, a gear type transmission 4 connected via the torque converter 3, and a combination of various transmission elements in the gear type transmission 4. And a hydraulic actuator 5 for performing a releasing operation. The operating hydraulic pressure for the hydraulic actuator 5 is ON / OFF controlled via various electromagnetic valves (not shown).

The control unit 6 for automatic transmission shift control includes a shift position sensor 7 for detecting the shift position of the automatic transmission 2 and a throttle sensor 9 for detecting the opening TVO of the throttle valve 8 of the intake system of the engine 1. The control signal for reducing the torque of the engine 1 at the time of shifting is performed based on the detection signal from the input signal. Hereinafter, first and second embodiments of the engine torque reduction control by the control unit 6 will be described with reference to the common flow chart shown in FIG.

Step (denoted by S in the figure. The same applies hereinafter) 1
Then, it is determined by the signal from the shift position sensor 7 whether or not the shift operation of the automatic transmission 2 is performed. If it is determined that the shift operation has been performed, the process proceeds to step 2 and the timer counter is activated. In step 3, the opening T of the throttle valve 8 detected by the throttle sensor 9 is detected.
Read VO.

In step 4, the start timing X ₁ and the end timing X _{2 of} the engine torque reduction control according to the opening TVO of the throttle valve 8 (X ₁ , X ₂ are the count values of the timer counter, and so on) are set. , Is read from a table stored in the ROM, which is obtained in advance by an experiment. Here, the engine torque reduction control includes a control for stopping the fuel supply to some or all of the cylinders and an ignition timing retard control. In the first embodiment, among these controls, the start timing X ₁ and the start timing X _{1 of the} control are adjusted so that the start timing and the end timing of the control are matched with the request timing of the engine reduction control in accordance with the response delay having the larger response delay. The end timing X ₂ is set. In the case of the present embodiment, the start timing X ₁ and the end timing X ₂ are set according to the response delay of the fuel supply stop control with the larger response delay.

In step 5, it is judged whether or not the value of the timer counter reaches the start timing X ₁ read in in step 4, and when it reaches, in steps 6 and 7, it is determined that some or all of the cylinders have been read. The control to stop the fuel supply is started and the control to retard the ignition timing is started. Thereafter, in step 8, it is determined whether or not the value of the timer counter has reached the end timing X ₂ read in step 4, and when it reaches, in steps 9 and 10, the fuel supply stop control is ended and ignition is performed. The timing retard control is ended.

As described above, the control start and end timings of both torque reduction controls are controlled in accordance with the response delay of the fuel supply stop control having the larger response delay after the start of control, thereby reducing each torque. Since the engine torque reducing action by the control acts without delay at the time of gear shifting, a sufficiently good gear shift shock mitigating function can be obtained. Further, in the second embodiment, the control start and end timings X ₁ and X ₂ are set according to the response delay of the control having the larger torque change in the two controls. Now, in the first embodiment shown in FIG. 4A, the torque change amount by the ignition timing retard control is set to be larger than the torque change amount by the fuel supply stop control, but in the second embodiment shown in FIG. As shown, when the torque change amount due to the fuel supply stop control is set to be larger than the torque change amount due to the ignition timing retard control, the control start and end timing X ₁ according to the response delay of the fuel supply stop control X ₁ , X ₂ is set, and the same timing control is performed.

In this case, since the torque reduction action by the fuel supply stop control having the higher shift shock reducing function is performed at the required time, a sufficiently good shift shock reducing function can be obtained. If the torque change amount by the ignition timing retard control is set to be larger than the torque change amount by the fuel supply stop control and the second embodiment is applied, the control start and end timings X ₁ and X ₂ are the ignition timing. According to the response delay of the retard control, the time is set to be shorter than that in the fuel supply stop control. In this way, when the magnitude relationship between the response delay and the torque change amount is opposite, the difference between the response delay and the torque change amount is taken into consideration to start the shift shock more effectively, The control method for setting the end timing may be determined.

In addition, the control method in which the control timing is set may be different between the first embodiment and the second embodiment depending on the combination of different engine torque reduction control methods .

[0019]

[0020]

[0021]

[0022]

As described above, according to the present invention
According to the shifting time torque control device of the first internal combustion engine, engine
There are multiple types that reduce the torque with different methods.
The one with the largest response delay after the start of control.
The timing of starting and ending the control of each torque reduction control means
Control to reduce all torque
The engine torque reduction effect of the reduction control means does not delay during shifting.
Functioning sufficiently, it is possible to obtain a sufficiently good shift shock mitigation function.
To be

[0023]

A second internal combustion engine gear shift according to the present invention
According to the hour torque control device, when a plurality of units for similarly performing the reduction control of the engine torque by different methods are provided, the control of each torque reduction control unit is performed according to the one in which the shaft torque of the automatic transmission changes the most by the control. By controlling the start and end timings, the engine torque reducing action by the torque reduction control means having the highest shift shock mitigating function is performed in accordance with the required timing, so that a sufficiently good shift shock mitigating function can be achieved. can get.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration and function of the present invention.

FIG. 2 is an overall system configuration diagram common to each embodiment of the present invention.

FIG. 3 is a flowchart showing a control routine common to the first and second embodiments of the present invention.

FIG. 4 is a time chart showing the operation of the first and second embodiments of the present invention.

FIG. 5 is a time chart showing the operation of the conventional example .

[Explanation of symbols]

1 organization 2 automatic transmission 3 Torque converter 6 control unit 7 Shift position sensor 9 Throttle sensor

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideki Sekiguchi Inventor Hideki Sekiguchi 1671 Kasugawa-cho, Isesaki-shi, Gunma Japan Electronic Equipment Co., Ltd. (56) Reference JP-A-3-264748 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) F16H 59/14 F02D 29/00 F02D 41/04 330 F02D 45/00 312 F02D 45/00 330

Claims (2)

(57) [Claims] A torque according to claim 1 an internal combustion engine with a torque converter automatic transmission is connected, a plurality during a shift of said automatic transmission
A torque reduction control device for an internal combustion engine, wherein the torque reduction control means reduces the plurality of torques.
The control response with the largest response delay after the start of control
The torque reduction control is performed at the required time according to the response characteristics of
So that the control start and end of each torque reduction control means
A gear shift torque control device for an internal combustion engine, comprising a timing control means for controlling timing in common . The torque of 2. An internal combustion engine with a torque converter automatic transmission is connected, a plurality during a shift of said automatic transmission
A torque reduction control device for an internal combustion engine, wherein the torque reduction control means reduces the plurality of torques.
Among the control means, the engine torque varies the most due to control.
However, depending on the response characteristics, the torque reduction
Control of each torque reduction control means to control
And a timing control means for commonly controlling the end timing of the internal combustion engine.