KR100256741B1 - Automatic shift control device and method of the same for an automatic transmission for vehicle - Google Patents

Abstract

A throttle valve detecting means for detecting an opening amount of the throttle valve linked to the accelerator pedal, and a vehicle speed detecting means for detecting a vehicle speed of the traveling vehicle; Engine speed sensing means for sensing engine speed according to engine driving; A shift stage setting switch that outputs an electric signal corresponding to a shift stage set by the driver's shift lever operation, and when the shift is made from the N stage to the D stage, the vehicle speed of the traveling vehicle, the engine speed, and the opening of the throttle valve Shift control means for outputting an ignition timing delay request signal according to the quantity and outputting a shift signal for shifting; When the ignition timing delay signal is output from the shift control means, the engine control means for delaying a predetermined ignition timing according to the detected engine speed for a predetermined time, and then outputs an ignition signal at a corresponding ignition timing, and the shift control means. Shifting means for shifting to a corresponding shift stage according to a shift signal output from the shift unit; A shift control apparatus of a shift vehicle comprising an ignition means ignited in accordance with an ignition signal output from the engine control means, by controlling the shift state in accordance with the power-off and power-on states of the vehicle, the shift shock generated by the instantaneous shift It is possible to prevent a decrease in the shifting feeling caused by the transmission, and also to prevent transmission destruction due to friction of the transmission due to instantaneous shifting according to the vehicle condition.

Description

Transmission control device and method thereof for automatic transmission vehicle

1 is a block diagram of a configuration of a shift control apparatus for an automatic shift vehicle according to an exemplary embodiment of the present invention.

2 is an operation timing diagram of a shift control apparatus of an automatic shift vehicle according to an exemplary embodiment of the present invention.

3 is an operation flowchart of shift control from the N stage to the D stage according to the power on / off state of the automatic transmission vehicle according to the embodiment of the present invention.

4 is a state diagram showing a change in turbine rotation speed according to the embodiment of the present invention.

The present invention relates to a shift control apparatus and a method of an automatic transmission vehicle. More specifically, when shifting from the N stage to the D stage, the ignition timing is delayed according to the power on / off state of the vehicle, thereby causing shock and friction of the transmission. A shift control apparatus and method for an automatic transmission vehicle for improving the durability of the element.

In general, the automatic transmission vehicle automatically performs an action of a transmission that changes the rotational speed and the rotational force of the engine and transmits it to the driving wheels according to the vehicle state, that is, the engine load, the throttle valve opening amount and the driving vehicle speed.

Conventionally, when the shift stage is set to the N stage, that is, the neutral stage is set, the driver sets the shift stage to the D stage for high speed driving, the hydraulic shock acting by the corresponding shift gear is adjusted to shift the shock due to the instantaneous high speed shift. Was prevented.

However, in the case of adjusting the hydraulic pressure acting as the corresponding transmission gear as described above, it is difficult to control during the high speed rotation, the instantaneous shock and friction of each transmission gear has a disadvantage that the durability is lowered.

Therefore, an object of the present invention is to solve the above-mentioned disadvantages, and when the automatic transmission vehicle shifts from the N stage to the D stage, the ignition timing is delayed according to the power on / off state of the vehicle, An object of the present invention is to provide a shift control apparatus and a method of an automatic transmission vehicle for improving durability of shock and friction elements.

The configuration of the present invention for achieving the above object, the throttle valve detection means for detecting the opening amount of the throttle valve linked to the accelerator pedal, the vehicle speed detection means for detecting the vehicle speed of the traveling vehicle, and the engine rotation according to the engine drive The engine speed detection means for detecting the number, a shift stage setting switch for outputting an electrical signal corresponding to the shift stage set in accordance with the shifting lever operation of the driver, and a traveling vehicle in the case where the shift is composed of A shift control means for outputting an ignition timing delay request signal according to the vehicle speed, the engine speed and the opening amount of the throttle valve, and outputting a shift signal for shifting, and when the ignition timing delay signal is output from the shift control means. , Delay the set ignition timing according to the detected engine speed for a certain time, and then start the ignition signal Force engine comprises a control means and the transmission means, the ignition means to be ignited in accordance with the ignition signal from the engine control means for performing a speed change in the shift speed corresponding to speed change according to the signal output from the shift control means.

According to another aspect of the present invention for achieving the above object, a step of comparing and detecting the detected traveling vehicle speed and the set vehicle speed when each sensing means is normally operated and the shift is set from the N stage to the D stage, When the vehicle is traveling at a high speed at a speed higher than the set vehicle speed, comparing the engine speed with the set speed and determining the power on / off state of the vehicle, and according to the determined power on / off state of the vehicle. The throttle valve opening amount and the set opening amount are compared and determined, and accordingly, an ignition timing delay request signal is output or a shift is performed from the N stage to the D stage.

Referring to the accompanying drawings, the most preferred embodiment which can easily practice this invention by the said structure is as follows.

1 is a block diagram of a shift control apparatus for an automatic shift vehicle according to an embodiment of the present invention, and FIG. 2 is an operation timing of a shift control apparatus for an automatic shift vehicle according to an embodiment of the present invention, and FIG. 4 is a flowchart illustrating a change in turbine rotational speed according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating an operation of shift control from the N stage to the D stage according to the power on / off state of the automatic transmission vehicle. .

As shown in the accompanying FIG. 1, the configuration of the shift control apparatus of the automatic transmission according to the embodiment of the present invention includes an engine speed detection unit 3 for detecting an engine speed of the vehicle and a vehicle speed for detecting a running vehicle speed. A detection unit 1, a throttle valve detection unit 2 for detecting an opening amount of a throttle valve linked to an accelerator pedal, an inhibitor switch IHS for detecting a shift stage set by a driver, and the detection unit ( 1 to 3) and a shift control unit 4 connected to the output terminal of the switch IHS and outputting an ignition timing delay request signal SR according to a vehicle state when shifting from the neutral stage N stage to the D stage; The engine controller 5 outputs an ignition signal by varying the ignition timing according to the ignition timing delay request signal SR output from (4), and according to the ignition signal connected to an output terminal of the engine controller 5. Spark plug (6) to be ignited, the engine A fuel injection unit 7 connected to the output end of the fisherman 5 to inject fuel, an idle speed regulator 8 connected to the output end of the engine control unit 5 to bypass the amount of air sucked into the engine by the children, It is composed of a solenoid valve 9 which is connected to the output of the shift control unit 4 and driven according to the shift signal applied to operate the hydraulic pressure with the corresponding shift gear to perform shift.

The operation of the shift control apparatus of the automatic transmission according to the embodiment of the present invention by the above configuration is as follows.

When power is applied to the vehicle after starting, the shift control unit 4 executes a self-diagnosis routine to determine whether a failure occurs (S110 to S120). According to the troubleshooting routine, the shift state is determined when all the devices mounted on the vehicle are normally operated.

In other words, it is determined whether the current shift stage is shifted from the N stage, which is the neutral stage, to the D stage, according to the embodiment of the present invention (S130). As the driver operates the shift lever, the inhibitor switch IHS interlocks to output an electric signal corresponding to the shift stage.

In the above, the shift control unit 4 determines whether the current shift stage is converted according to the signal output from the inhibitor switch IHS, and when the current shift stage is converted from the N stage to the D stage, according to the driving state of the vehicle. A routine is performed to delay the ignition timing and to prevent shock during shifting.

In order to determine the driving state of the current vehicle, the shift control unit 4 first senses the driving vehicle speed of the current vehicle. The vehicle speed detector 1 detects the number of revolutions of the wheels mounted on the wheels and outputs an electrical signal corresponding thereto.

The shift control unit 4 determines whether the detected vehicle speed is equal to or greater than the set vehicle speed (S140). When the vehicle is traveling at a low speed when the detected vehicle speed is lower than or equal to the set vehicle speed, the engine speed according to the current vehicle driving is determined to determine whether the driver intends to engage the shift gear at a moment by raising the engine speed in a stopped state. Detects and compares with the set rotation speed (S150).

At this time, the engine control unit 5 also detects the engine speed of the current vehicle and sets an appropriate ignition timing accordingly.

The engine speed detection unit 3 is mounted on the crankshaft, which is an output side of the engine, detects the rotation speed of the crankshaft that rotates in conjunction with the engine driving, and outputs an electrical signal corresponding thereto.

In the above, when the engine speed is detected to be higher than the set speed while driving at a low speed, the shift controller 4 determines that the engine speed is increased to engage the transmission gear in a stopped state. The ignition timing delay request SR is output to the engine control unit 5 in order to protect the transmission damage due to the gearing, thereby delaying the gear shifting for a predetermined time (S160).

When the ignition timing delay request signal SR is output from the shift controller 4, the engine controller 5 sets the ignition timing delayed for a predetermined time according to the currently detected engine speed.

In other words, by delaying the ignition timing set by the instantaneous increase in the engine speed in the stopped state of the vehicle, the engine output is reduced to prevent transmission friction due to the instantaneous engagement.

In the above, when the engine speed detected in the state where the vehicle is traveling at a high speed is less than the set speed, the shift control unit 4 drives the corresponding solenoid valve 9 to shift from the N stage to the D stage set by the driver. (S170).

In the case where the vehicle speed of the currently traveling vehicle is traveling at a higher speed than the set speed, the shift control is performed differently according to the detected engine speed.

When the engine speed detected when the vehicle is currently traveling at high speed is compared and determined (S80), and when the engine speed is greater than or equal to the set speed, the detected opening degree and the set opening amount of the detected throttle valve are compared and determined. Accordingly, the shift control is performed (S190).

The throttle valve detecting unit 2 interlocks with the accelerator pedal, detects an opening amount of the throttle valve which varies according to the amount of the driver's stepping on the accelerator pedal, and outputs an electrical signal corresponding thereto.

The shift control unit 4 is the driver's willingness to accelerate if the opening degree of the detected throttle valve is greater than or equal to the set opening amount while the vehicle is currently traveling at a high speed and the engine is being driven at a predetermined rotation speed or more. It is determined that the step of pressing the accelerator pedal normally increases, and performs the shift from the N stage to the D stage according to the shift stage set by the driver (S170).

In the above state, when the current vehicle is traveling at a high speed and the engine is driven at the engine speed higher than the set engine speed, when the detected opening amount of the throttle valve is lower than the preset engine speed, the engine speed of the throttle valve is higher than the preset engine speed. If the shift stage is selected in a state of not opening, that is, the driver determines that the shift is selected without a willingness to accelerate.

As described above, when a high speed shift from the N stage to the D stage is performed without the driver's willingness to accelerate, the shift controller 4 requests the engine controller 5 to delay the ignition timing. The signal SR is output (S200).

When the ignition timing delay request signal SR is output from the shift controller 4, the engine controller 5 delays the ignition timing set according to the detected engine speed for a predetermined time, and then outputs the ignition signal according to the delayed time. This prevents shift shock when shifting from N gear to D gear regardless of the driver's will.

When the engine speed detected in the state where the vehicle is traveling at high speed is equal to or less than the set speed, the vehicle branches to the routine shown in FIG. 3B to control the vehicle state.

In case of driving at a high speed as described above, when the engine speed is less than or equal to the set speed corresponding to the high speed, the fourth figure in which the driving inertia of the vehicle is attached with a power off state larger than the engine driving force is shown in FIG. A change in number is shown.

Unlike the case shown in FIG. 2, the turbine speed is increased after the engagement from the N stage to the D stage. That is, a state in which the turbine rotation speed is increased by receiving the energy due to the inertia of the vehicle.

Accordingly, when the power is turned off at high speed and the engine speed is lower than or equal to the set speed, unlike the above power on state, shift control is performed in accordance with the routine shown in FIG.

The shift control unit 4 detects the opening amount of the throttle valve according to the operation amount of the current accelerator pedal when the vehicle is traveling at a high speed and the engine rotation speed is lower than the set rotation speed. For example, it is compared with the opening amount of 75% or more and 100% or less) (S210 to S220).

The shift control unit 4 when the detected throttle valve opening amount is more than the maximum opening amount, when the engine speed of the current vehicle is not yet increased, but a sudden increase in the engine speed is expected while the driver is willing to accelerate Judging by.

In this case, even if the shift from the N-stage to the D-stage is performed, the transmission control unit 4 does not give much force to the transmission. Therefore, the shift control unit 4 operates the solenoid valve 9 from the N-stage to the D-stage without any correction. To perform the shift of (S230).

When the opening amount of the throttle valve detected when the vehicle is traveling at a high speed and the engine speed is lower than the set rotation speed is not in the WOT state, the detected throttle valve opening amount and the minimum opening amount are compared and determined (S240).

The shift control unit 4 determines that the driver anticipates the shock and hopes that a quick shift gear is engaged when the detected throttle valve opening amount is less than or equal to the minimum opening amount (for example, about 20%). In operation S200, the solenoid valve 9 is driven according to the set shift stage to perform the shift from the N stage to the D stage.

In the above case, when the vehicle travels at a high speed and the engine speed is less than or equal to the set rotational speed, and the opening amount of the throttle valve is between the WOT and the minimum opening amount, the shift control unit 4 wishes the driver to shift smoothly. Determine the state.

In such a state that the shifting from the N stage to the D stage is smoothly performed in the power-off state, the shift control unit 4 first increases the output of the engine so as to absorb the shock from the N stage to the D stage. Is output to the engine control unit 5.

When the output increase signal is output from the shift control unit 4, the engine control unit 5 operates an idle speed regulator 8 that adjusts the amount of air sucked at idle, in addition to the amount of air sucked in accordance with the opening amount of the throttle valve. The amount of air sucked into the engine is increased, and the fuel injection amount is increased in accordance with the increase in the amount of air sucked, thereby increasing the output of the engine, thereby absorbing the shift shock during the shift from the N stage to the D stage.

As described above, when the shift is performed from the N stage to the D stage in the automatic transmission vehicle according to the embodiment of the present invention, by controlling the shift state in accordance with the power-off and on state of the vehicle, The fall of a shift feeling by a shift shock can be prevented.

In addition, an automatic transmission vehicle having an effect of preventing transmission destruction due to friction of a transmission due to instantaneous shifting according to a vehicle state may provide a shift control apparatus and a method thereof.

Claims (13)

Throttle valve detection means for detecting the opening amount of the throttle valve linked to the accelerator pedal, Vehicle speed detection means for detecting the vehicle speed of the driving vehicle, Engine speed detection means for detecting the engine speed according to the engine drive, A shift stage setting switch that outputs an electric signal corresponding to a shift stage set by a shift lever operation, and an engine in which the vehicle travels at a high speed beyond the set speed and is detected when the shift is made from N stages to D stages. If the speed of the vehicle is more than the set speed and the vehicle is powered on, if the detected opening amount of the throttle valve is smaller than the set opening amount, it is determined that the driver is not willing to drive at high speed, and the engine control means sends an ignition delay request signal. If the opening amount of the throttle valve is greater than the set opening amount, the driver will A shift control means for outputting a corresponding shift signal for shifting from the N stage to the D stage and determining that the ignition timing is set according to the detected engine speed when the ignition timing delay signal is output from the shift control means. Engine control means for outputting an ignition signal at a corresponding ignition timing after a time delay, shifting means for shifting to a corresponding shift stage according to a shift signal output from the shift control means, and outputting from the engine control means A shift control apparatus for an automatic transmission vehicle, characterized in that consisting of ignition means to be ignited according to the ignition signal. The method of claim 1, wherein the shift control means performs a self-diagnostic routine when power is applied to determine whether a failure occurs in each of the sensing means, and when the sensing means operate normally, shifting from the N stage to the D stage. A shift control apparatus for an automatic transmission vehicle, characterized in that it is determined whether or not to set. The shift control means according to claim 1, wherein the shift control means detects when the speed of the engine from the N stage to the D stage is set and the engine speed detected while the vehicle is traveling at a high speed is lower than the set speed. If the throttle valve opening amount and the maximum opening amount and the minimum opening amount are compared and judged, and the throttle valve opening amount detected when the vehicle is powered off is more than the maximum opening amount or less than the minimum opening amount with the throttle valve fully open, And a corresponding shift signal for shifting to the D stage in the automatic shifting vehicle. The shift control means according to claim 3, wherein the shift control means determines that the driver desires smooth shifting when the throttle valve opening amount detected in the power-off state is smaller than the maximum opening amount and larger than the minimum opening amount. And outputs an engine power increase request signal to the engine control means, and when the engine power increase request signal is output from the shift control means, outputs an idle signal to increase the amount of air sucked into the engine and increases the suction. And an engine output is increased by increasing a fuel injection amount according to the amount of air and outputting a fuel injection signal corresponding thereto. 4. An idle speed regulator as claimed in claim 3, wherein the idle speed regulator is driven in accordance with an idle signal output from the engine control means to bypass the amount of air sucked into the intake valve to the engine, thereby increasing the amount of air drawn into the engine, and the engine control means. And a fuel injection means which is driven according to the fuel injection signal outputted from the fuel injection means, and injects fuel. The engine speed change speed and the rotation speed set forth in claim 1, wherein the shift control means is traveling at a low speed at which the traveling vehicle speed of the vehicle is smaller than the set vehicle speed when the shift from the N stage to the D stage is set. When the engine speed is greater than or equal to the set speed, it is determined that the transmission gear is to be engaged quickly, and the ignition timing delay request signal is output to the engine control means. Device. The shift control means according to claim 6, wherein the shift control means outputs a corresponding shift signal for shifting from the set N stage to the D stage when the engine speed detected when the vehicle is traveling at a low speed is less than or equal to the set rotation speed. A shift control apparatus for an automatic transmission vehicle, characterized in that. Comparing the detected traveling vehicle speed with the set vehicle speed when the sensing means operates normally and the shift is set from the N stage to the D stage, and when the vehicle is traveling at a high speed above the set vehicle speed. And comparing the engine speed with the set speed and determining that the vehicle is in the power-on state when the engine speed is greater than or equal to the set speed. The throttle valve opening amount and the set opening amount detected when the vehicle is in the power-on state. When the detected throttle valve opening amount is smaller than the set opening amount, it is determined that the driver is not willing to drive at a high speed, and outputs an ignition delay request signal to reduce the engine output. If the detected opening amount of the throttle valve is greater than the set opening amount, the driver may The determination is made that land, wherein the shift control of the automatic transmission vehicle, characterized in that it comprises the step of performing the speed change from N-range to D-range. The method according to claim 8, wherein in the step of determining the power on / off state of the vehicle, when the shift from the N stage to the D stage is set and the engine speed detected while the vehicle is traveling at a high speed is lower than the set rotation speed, And judging that the driving inertia of the power off state is greater than the engine driving force, and comparing the detected throttle valve opening amount with the maximum opening amount and the minimum opening amount. 10. The method of claim 9, wherein if the throttle valve opening amount detected when the vehicle is in the power-off state is greater than the maximum opening amount or less than the minimum opening amount with the throttle valve fully open, shifting from the N stage to the D stage is performed. Shift control method of automatic transmission vehicle. 10. The engine power increase request signal according to claim 9, wherein when the throttle valve opening amount detected in the power-off state is smaller than the maximum opening amount and larger than the minimum opening amount, the driver determines that the driver desires a smooth shift to be made. A shift control method for an automatic transmission vehicle, characterized in that to increase the engine output by outputting. The engine rotation speed of the engine according to claim 9, wherein the engine rotation speed and the set rotation speed are compared and judged when the traveling vehicle speed of the vehicle is running at a lower speed than the set vehicle speed when the shift from the N stage to the D stage is set. And determining that the transmission gear is to be engaged quickly if the number is greater than or equal to the set rotation speed, and outputting an ignition timing delay request signal to reduce the engine output. The shift control method of claim 12, wherein the shifting from the set N stage to the D stage is performed when the engine speed detected when the vehicle is traveling at a low speed is less than or equal to the set rotation speed.