KR100394688B1 - Method for engine torque reduction controlling in automatic transmission vehicle - Google Patents

Abstract

In engine torque control, the shift lever selects the driving mode and at the same time drives the accelerator pedal for rapid acceleration, and the engine stall is generated by ignoring the torque down request signal if the fuel amount that maintains the idle speed when the engine torque is requested is the minimum starting maintenance fuel amount. To be excluded.

The present invention is a process for determining whether the information detected in the engine idle state in which the shift lever is located in the 'N' range satisfies the torque control condition due to rapid start, and if the torque control condition is satisfied, the shift control means is provided to the engine control means. Outputting the torque down request signal; and receiving the torque down request signal; determining whether the current fuel amount that maintains the idle rotational speed is the minimum starting maintenance fuel amount; And disregarding the torque down request signal of the control means to maintain the current injection amount.

Description

TECHNICAL FOR ENGINE TORQUE REDUCTION CONTROLLING IN AUTOMATIC TRANSMISSION VEHICLE}

The present invention relates to an engine torque control apparatus, and more particularly, a torque down request signal of a shift control means by determining a fuel amount maintaining idle rotation speed when driving an accelerator pedal for rapid acceleration at the same time as selecting a driving mode of a shift lever. It relates to an engine torque control method of an automatic transmission to control the engine stall is not generated.

In the case of a car equipped with an automatic transmission, when the driver selects the shift lever position from the 'N' range to the 'D' range and drives the accelerator pedal rapidly for acceleration, the shift control means In order to prevent the occurrence of shift shock during engagement and engagement of line pressure and duty pressure for shift stage synchronization, the engine control means rapidly increases engine output by outputting a request signal for reducing engine torque. Prevent it.

As described above, the process of performing the engine torque down control in the automatic transmission-mounted vehicle is as shown in FIG. The rotation speed is maintained, and the shift lever is shifted from the 'D' range to the 'N' range while the fuel level is maintained at the minimum starting fuel level, and the accelerator pedal is rapidly accelerated. In this case, the engine speed in the idle state is increased according to the opening of the throttle opening degree, and at this time, the torque down signal is requested from the ECU side, which is the engine control means, to eliminate the occurrence of the shift shock in the TCU, which is the shift control means.

Therefore, the ECU, which is an engine control means, outputs an engine torque down control signal to interrupt the opening time of the injector in response to a request of the TCU, which is a transmission control means, thereby reducing the amount of fuel supplied to the combustion chamber, thereby substantially supplying the combustion chamber. The engine amount is generated by supplying a fuel amount which is lower than the minimum starting injection amount for maintaining the idle speed.

The present invention has been invented to solve the above problems, the object of which is that if the shift lever is shifted to the 'D' range while the shift lever is located in the 'N' range, and a sudden acceleration demand is generated, If the minimum starting maintenance amount is detected by detecting the fuel amount for maintaining the idle rotation speed, the engine torque down request signal is ignored so that engine stall is not generated.

1 is a schematic block diagram of an engine torque control apparatus for an automatic transmission according to the present invention;

2 is a flow diagram of one embodiment for performing engine torque control in an automatic transmission in accordance with the present invention.

The present invention for achieving the above object is a process of determining whether the information detected in the engine idle state where the shift lever is located in the 'N' range satisfies the torque control condition by the sudden start, and if the torque control condition is satisfied The shift control means outputs the torque down request signal to the engine control means, and the engine control means receiving the torque down request signal determines whether the current fuel amount maintaining the idle rotational speed is the minimum starting maintenance fuel amount; If the minimum start-up fuel amount in the above, characterized in that it comprises the step of ignoring the torque down request signal of the shift control means to maintain the current fuel amount.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen in Figure 1, the engine torque control apparatus of the automatic transmission according to the present invention is the engine speed detection unit 10, the throttle opening degree detection unit 20, the shift lever detection unit 30, TCU 40, ECU ( 50) and the injector 60, the engine speed detector 10 detects the current engine speed by detecting the rotation of the crankshaft and outputs an electrical signal therefor.

The throttle opening degree detector 20 detects the opening degree information of the throttle valve operated in conjunction with the accelerator pedal driven by the driver and outputs an electrical signal thereof.

The shift lever detector 30 detects a selection signal of a range consisting of 'P', 'R', 'N', 'D', '2', and '1' and outputs an electrical signal thereto.

The TCU 40 automatically keeps driving by synchronizing the target shift stage according to the shift pattern set in the map table according to the vehicle speed and the opening degree of the throttle valve while the driving range is selected as the shift control device. Is selected as the 'D' range in the idle state of the engine selected in the 'N' range, and a signal is requested for the engine torque down for a predetermined time, approximately 1 second when a signal input for rapid acceleration is detected. do.

The ECU 50 is an engine control device. When an input of a signal requesting torque down is detected from the TCU 40, the engine torque down control is not performed if the amount of fuel for maintaining the idle speed is the minimum starting maintenance fuel amount. .

The injector 60 opens and closes during the corresponding time according to the control signal applied from the ECU 50 to supply the amount of fuel calculated in the combustion chamber.

Operation of performing engine torque control in the present invention including the function as described above is as follows.

In the engine start-up state of the vehicle equipped with the automatic transmission, the TCU 40 detects the current engine speed information from the engine speed detection unit 10 and detects the opening degree information of the throttle valve from the throttle opening degree detection unit 20. Then, the shift lever detection unit 30 detects the state information of the vehicle such as the current shift stage information (S101).

At this time, while the state information of the detected vehicle maintains the idle engine speed and the throttle opening degree satisfies the idle speed, the shift lever is shifted from the 'N' range to the 'D' range and requires rapid acceleration. It is determined whether the torque down control condition is satisfied (S102).

When the torque down control condition is satisfied in the above, the TCU 40 applies a signal to the ECU 50 for requesting torque down for a predetermined time, approximately 1 second.

The ECU 50 detects the current fuel fuel amount holding the idle rotation speed in accordance with the torque down request signal from the TCU 40 and determines whether it is the fuel amount for the lowest starting maintenance (S103) (S104).

If it is determined that the current fuel amount maintaining the idle rotation speed is the fuel amount for maintaining the minimum starting, it is determined that the engine will stall during engine torque down control, and maintains the current fuel amount and then changes the vehicle speed and the throttle opening ratio. Engine torque control is performed as required (S105) (S106).

When it is determined that the current fuel fuel amount maintaining the idle rotation speed is equal to or more than the fuel amount for the lowest starting maintenance, the engine torque down control is performed by driving the injector 60 after calculating the fuel amount for torque down through a predetermined algorithm. It is performed (S107) (S108).

As described above, according to the present invention, when the shift lever is shifted from the 'N' range to the 'D' range and suddenly accelerated in an automobile equipped with an automatic transmission, the torque of the TCU is less than the minimum starting maintenance fuel amount when the amount of fuel maintaining the idle rotation speed is lower than By ignoring the down request, engine stalls are prevented, thereby providing reliability in the running of the vehicle.

Claims (2)

Determining whether the information detected in the engine idle state in which the shift lever is located in the 'N' range satisfies the torque control condition due to sudden start; If the torque control condition is satisfied, the shift control means outputs a torque down request signal to the engine control means; Receiving the torque down request signal, the engine control means includes the step of determining whether the current fuel amount maintaining the idle rotational speed is the minimum starting maintenance fuel amount; And a step of ignoring the torque down request signal of the shift control means when the minimum starting maintenance fuel amount is maintained to maintain the current fuel amount. The method of claim 1, The torque control condition is an engine torque control method of an automatic transmission, characterized in that the shift lever is shifted from the 'N' range to the 'D' range in the idle state of the engine and driving of the accelerator pedal requiring rapid acceleration.