KR100387838B1 - Kick down shift controlling device and method for automatic transmission of vehicle - Google Patents

Abstract

For the purpose of compensating for the duty corresponding to the engine power and the load when the low speed kick-down shift occurs while driving on the slope at high oil temperature and high ground, to prevent the occurrence of run-up during the shift;

Vehicle driving state detection means for detecting a vehicle driving state that is variably output according to the driving state of the vehicle; A predetermined control signal is outputted to the vehicle driving state detecting means to receive the signal detected by the vehicle driving state detecting means, and the atmospheric pressure, the throttle valve opening degree, the engine speed, and the accelerator pedal are output in synchronization with the control signal. Engine control means for receiving the state and the vehicle speed and outputting a predetermined atmospheric pressure signal; The vehicle detects the vehicle driving state detection means and the signal output from the engine control means and receives the shift mode state, the throttle valve opening degree, the engine speed, the accelerator pedal operation state, the vehicle speed, atmospheric pressure, and the oil temperature. Shift control means for performing a low speed kick-down shift control in accordance with the low speed kick-down shift condition satisfaction state in the vehicle, when the first driving condition is satisfied; Drive means for synchronizing with a predetermined control signal output from the shift control means to shift the shift stage to the target shift stage, so that the engine output and load when the low speed kick-down shift occurs during driving on a high oil temperature and high ground By compensating for the duty corresponding to the shift to prevent the run-up occurs during the shifting to perform the shifting, there is an effect that can improve the shifting feeling during shifting.

Description

KICK DOWN SHIFT CONTROLLING DEVICE AND METHOD FOR AUTOMATIC TRANSMISSION OF VEHICLE}

The present invention relates to a kick-down shift control apparatus and method of an automatic transmission for a vehicle, and more particularly, the run-up generated during a low-speed kick-down shift during high-temperature ramp and high-altitude ramp in a running automatic transmission vehicle. The present invention relates to a kick-down shift control apparatus and method for an automatic transmission for a vehicle that can prevent the phenomenon.

In general, the automatic transmission applied to a vehicle is controlled by the shift control device controlling a plurality of solenoid valves to control the hydraulic pressure according to the driving speed of the vehicle, the opening ratio of the throttle valve, and various detection conditions. The shift is made.

That is, in the automatic transmission in which the shift is automatically performed as described above, when the driver converts the select lever to the desired shift range, the manual valve port is changed and the hydraulic pressure supplied from the oil pump is controlled by the duty control of the solenoid valve. Selective actuation of the various operating elements of the mechanism allows shifting. The speed change is determined by a program preset in the memory according to the throttle valve opening amount and vehicle speed change in the automatic shift control device, and the duty control signal corresponding to the determined shift is output to the solenoid valve to control the shift. Is done.

The automatic transmission operated according to the operation principle has a friction element that is deactivated in the operating state and a friction element that is converted from the deactivated state when the shift to each target shift stage is performed. Since the shifting performance of the automatic transmission is determined by the timing of element deactivation and start of operation, research on the shift control method for improving the shifting performance has been actively conducted.

In view of the technical background of the present invention, the shift control of the automatic transmission according to the driving state of the vehicle upshift shift control in which the shift is sequentially made from the 1st speed, which is the full speed, to 5th speed, and 1 from 5th forward speed. There are downshift shifting control in which shifting is sequentially performed up to the speed, and downshift shifting control in which downshifting is performed from 5th speed to 3rd speed, 4th speed to 2nd speed, and 3rd speed to 1st speed. When a low speed kickdown shift occurs during road driving and on a hilltop, the present invention relates to a vehicle automatic transmission that performs a low speed kickdown shift without a shift shock.

In a vehicle equipped with the above automatic transmission for vehicles, if a low speed kickdown shift occurs while the oil temperature is higher than a preset reference value or when driving on a hill at high altitudes, the engine output and the low speed kickdown at a low slope are conventionally used. Since there is no duty compensation control corresponding to the load, a shift shock frequently occurs due to the run-up when shifting.

Accordingly, an object of the present invention for solving the above problems is to execute a duty compensation corresponding to the engine output and load when the low-speed kick-down shift occurs while driving in the gradient at high oil temperature and high ground can prevent the run-up during shifting An object of the present invention is to provide a kick-down shift control apparatus and method for an automatic transmission for a vehicle.

The present invention for achieving the above object,

Vehicle driving state detection means for detecting a vehicle driving state that is variably output according to the driving state of the vehicle; A predetermined control signal is outputted to the vehicle driving state detecting means to receive the signal detected by the vehicle driving state detecting means, and the atmospheric pressure, the throttle valve opening degree, the engine speed, and the accelerator pedal are output in synchronization with the control signal. Engine control means for receiving a state and a vehicle speed and outputting a predetermined engine control signal and an atmospheric pressure signal; The vehicle driving the high altitude by receiving the shift mode state, the throttle valve opening degree, the engine speed, the accelerator pedal operation state, the vehicle speed and the atmospheric pressure signal output from the engine control means and the vehicle detected and applied by the vehicle driving state detecting means. A shift control means for performing a run-up control low speed kick down shift when the low speed kick down shift condition is satisfied when the vehicle is driven at a high high temperature gradient; And a driving means for synchronizing with a predetermined control signal output from the shift control means to adjust fuel injection and ignition timing of the engine and to shift the shift stage to the target shift stage.

Another invention for carrying out the above object,

Determining whether the vehicle is driven by a high-altitude high-temperature gradient in the vehicle driving on the high ground;

When the driving conditions are satisfied with the high-altitude high-temperature gradient in the above step, the run-up control low speed kickdown shift may be performed according to whether the low speed kickdown shift condition is satisfied.

1 is a block diagram of a shift control apparatus of an automatic transmission for a vehicle applied to the present invention.

2 is a flowchart illustrating a shift control method of an automatic transmission for a vehicle applied to the present invention.

3 is a shift control duty pattern diagram according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100: vehicle running state detection means 110: atmospheric pressure detection unit

120: throttle valve opening degree detection unit 130: engine speed detection unit

140: accelerator pedal operation detection unit 150: vehicle speed detection unit

160: oil temperature detection unit 200: engine control means

300: shift control means 400: drive means

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

1 is a block diagram illustrating a shift control apparatus of an automatic transmission for a vehicle according to the present invention. The vehicle driving state detecting apparatus 100 detects a vehicle driving state that is variably output according to the driving state of the vehicle, and the engine control apparatus 200. ) Outputs a predetermined control signal to the vehicle driving state detecting device 100 to receive a signal detected by the vehicle driving state detecting device 100, and is output in synchronization with the control signal. , The engine speed, the accelerator pedal operation state and the vehicle speed are input, and a predetermined atmospheric pressure signal is output, and the shift control device 300 detects and applies the shift mode state and throttle of the vehicle detected by the vehicle driving state detection device 100. A vehicle driving high altitude with input of valve opening, engine speed, accelerator pedal operation state, vehicle speed and oil temperature, and atmospheric pressure signal output from engine control device 200 In the high-temperature high temperature gradient, the low-speed kick-down shift condition is determined to be satisfied, and the run-up control low-speed kick-down shift is performed, and the driving device 400 includes the engine control device 200 and the shift control device ( Synchronized by a predetermined control signal output from 300, the engine fuel injection and ignition timing are adjusted, and the shift stage is shifted to the target shift stage.

The vehicle driving state detection apparatus 100 includes an atmospheric pressure detection unit 110 which detects atmospheric pressure and is applied when controlling the engine; A throttle valve opening amount detection unit 120 applied to detect an opening amount of a throttle valve to be interlocked according to an accelerator pedal operation state of the driver and to apply the engine control and the shift stage; An engine rotation speed detection unit (130) applied to detect the rotation speed of the engine of the running vehicle and to control the engine and determine the shift stage; An accelerator pedal operation detection unit 140 which is applied when the engine control and the shift stage are determined by detecting an opening degree varying according to the driver's accelerator pedal operation state; A vehicle speed detection unit 150 which is applied to detect the driving vehicle speed of the vehicle being driven and to control the engine and determine the shift stage; It is provided with an oil temperature detection unit 160 is applied to determine the transmission stage by detecting the temperature of the automatic transmission oil of the running vehicle.

Hereinafter, with reference to FIGS. 2 and 3 attached to the kick-down shift control method of the automatic transmission for vehicles having the above configuration will be described in detail.

The vehicle driving state detecting apparatus 100 detects an atmospheric pressure, a throttle valve opening degree, an engine speed, an accelerator pedal operating state, a vehicle speed, an oil temperature, and the like, which vary according to the vehicle driving state.

The engine control apparatus 200 outputs a predetermined control signal to the vehicle driving state detecting apparatus 100, and the vehicle driving state detecting apparatus 100 is output by the predetermined control signal output from the engine control apparatus 200. Atmospheric pressure, throttle valve opening, engine speed, accelerator pedal operation status and vehicle speed are detected in synchronization.

In addition, when the shift control apparatus 300 outputs a predetermined control signal to the vehicle driving state detecting apparatus 100 and the engine control apparatus 200, the vehicle driving state detecting apparatus 100 may be transferred from the shift control apparatus 300. In synchronization with the predetermined control signal outputted, the throttle valve opening degree, the engine speed, the accelerator pedal operation state, the vehicle speed and the oil temperature, etc. are output, and the engine control device 200 transmits a predetermined atmospheric pressure signal to the shift control device 300. Output to

Accordingly, the shift control apparatus 300 includes a predetermined atmospheric pressure signal output from the engine control apparatus 200 and a throttle valve opening degree, an engine speed, an accelerator pedal operating state, and a vehicle speed output from the vehicle driving state detection apparatus 100. And an oil temperature or the like, and calculates a gradient path of the traveling vehicle by the set program (S100 and S110).

In the above, the calculation method by the gradient of the traveling road is calculated as follows.

Acceleration (a1) = (Fe-Fr) / M calculated above

Where Fe is the engine output torque,

Fr is the running resistance,

M is mass.

Subsequently, as the gradient path RS of the driving vehicle is calculated and calculated, the shift control apparatus 200 determines whether the first driving condition, which is the driving condition of the gradient, is satisfied (S120).

The first driving condition, which is a driving condition as a gradient, is a condition in which atmospheric pressure (Pa) ≤ first set value (642 mmHg) gradient road (RS) ≥ second set value (5%) oil temperature ≥ third set value (100 ° C) It is a condition that must satisfy all of them.

If it is determined that the first driving condition, which is the driving condition in the gradient, is satisfied, the shift control apparatus 300 determines whether the low speed kick-down shift condition is satisfied (S130).

The low speed kick down shift condition is a condition in which a kick down request signal according to an accelerator pedal operation of a driver is input in a vehicle that is traveling at a predetermined shift stage. Therefore, when it is determined that the kick-down request signal according to the acceleration pedal operation of the driver is input in a vehicle with high high temperature low speed driving, the shift control apparatus 300 may prevent a run-up that may occur during shifting. The run-up control low speed kick-down shift signal is output and returned to the main routine (S140).

As shown in FIG. 3, the predetermined run-up control low speed kick-down shift signal is 100% when the kick-down signal according to the acceleration pedal operation of the driver is input. → controlled by the fifth set duty (Dsr) to release the combined friction elements.

Subsequently, the shift control apparatus 300 outputs the reverse slope duty using the release duty as the fifth set duty Dsr + correction duty Δsr.

Subsequently, the shift control apparatus 300 outputs the release control reverse slope duty, and after a predetermined time has elapsed, the engagement duty for controlling the engagement of the predetermined friction element, which is the engagement element, is set from 0% to 100%. Output during fill time. Subsequently, when the predetermined fill time period has elapsed, the reduced duty of the combined duty of 100% to the predetermined tenth set duty Da is reduced, and then the tenth set duty Da is reset to an initial value by a preset program. One coupling side feedback duty control is performed to shift the shift stage to the target shift stage.

In the shift control apparatus 300 for outputting a coupling side feed back duty control for engaging a predetermined friction element, the actual turbine speed Nt (not shown) is set according to a change in the vehicle driving state. If it is determined whether the target point has been reached, and it is determined that the actual turbine speed Nt (not shown) reaches the predetermined target point, the predetermined duty having the inverse slope inclination of the release side duty is determined. 6 Reduction correction control by the set duty Dr.

The above-mentioned sixth set duty Dr = release duty ΔDr + reverse slope final duty can be calculated.

As the release side duty is corrected to the predetermined sixth set duty Dr and output, the shift control apparatus 300 releases the release side feed having the sixth set duty Dr as an initial value by a preset program. Perform back control.

Subsequently, the shift control apparatus 300 performs the coupling-side feedback control for shifting the shift stage to the target shift stage, and compares and determines whether shift shift is completed.

In the transmission shift completion determination above, when it is determined that the actual turbine speed (not shown) reaches the target turbine speed, the shift control apparatus 300 determines that the shift synchronization is completed.

Therefore, when it is determined that the transmission is completed, the shift control apparatus 300 corrects the end-of-combination duty to a predetermined eleventh set duty De by using the coupling-side feedback back final duty as an initial value and maintains the predetermined duration for a predetermined time. After the predetermined time has elapsed, the low speed kick-down shift coupling side control is completed by controlling the combined duty to increase the eleventh set duty De to 100%.

The above-described set duty De may be corrected to the correction duty ΔDe and the coupling-side final feedback control duty.

In addition, when a predetermined time elapses from the time when the engagement-side shift synchronization is judged to be completed, the shift control apparatus 300 ends the release-side duty control by controlling the release-side duty to 0%.

However, if any one of the first driving condition and the low speed kick-down shift control condition that are the driving conditions at the high ground gradient (S120) is not satisfied, the shift control apparatus 300 does not perform the shift control and performs main control. Return to the routine.

Thus, when a kick-down signal according to the acceleration pedal operation of the driver is input while driving at a low speed in a high oil temperature state at high altitude, the shift control apparatus 300 runs-up control low speed to prevent a run-up during shifting. By performing the kick down shift, the low speed kick down shift can be completed without shift shock.

As described above, the apparatus and method for controlling a kickdown shift of an automatic transmission for a vehicle according to an embodiment of the present invention compensates for the duty corresponding to the engine output and load when a kickdown shift occurs during low speed driving on a slope at high oil temperature and high ground, By performing the duty control to prevent the occurrence of run-up, there is an effect that can improve the shifting feeling during shifting.

Claims (12)

Vehicle running state detecting means for detecting a vehicle running state such as an atmospheric pressure, a throttle valve opening degree, an engine speed, an accelerator pedal operating state, a vehicle speed, and an oil temperature, which are varied according to the running state of the vehicle; A predetermined control signal is outputted to the vehicle driving state detecting means to receive the signal detected by the vehicle driving state detecting means, and the atmospheric pressure, the throttle valve opening degree, the engine speed, and the accelerator pedal are output in synchronization with the control signal. Engine control means for receiving the state and the vehicle speed and outputting a predetermined atmospheric pressure signal; The vehicle detects the vehicle driving state detection means and the signal output from the engine control means and receives the shift mode state, the throttle valve opening degree, the engine speed, the accelerator pedal operation state, the vehicle speed, atmospheric pressure, and the oil temperature. Shift control means for performing a run-up control low speed kick down shift when the low speed kick-down shift condition is satisfied when the vehicle is driven with a high-altitude high-temperature gradient in the vehicle; A low speed kick-down shift control apparatus for an automatic transmission for a vehicle, characterized in that the drive means is synchronized with a predetermined control signal output from the shift control means to shift the shift stage to a target shift stage. delete Determining whether the driving conditions are satisfied by the high-altitude high-temperature gradient in the vehicle driving on the high ground; Determining whether the run-up control low speed kick-down shift condition is satisfied when it is determined that the driving condition is satisfied by the high-altitude high-temperature gradient in the step; And if it is determined in the step that the run-up control low speed kick-down shift condition is satisfied, performing the run-up control low speed kick-down shift duty control. 4. The vehicular automatic transmission of claim 3, wherein the determination condition for driving at the high-altitude high temperature gradient is a condition that all of the conditions of atmospheric pressure ≤ first set value gradient ≥ second set value oil temperature ≥ third set value must be satisfied. Low speed kick down shift control method. The method of claim 4, wherein the first set value is 642 mmHg, the second set value is 5%, and the third set value is 100 ° C. 6. The low speed kick-down shift control of an automatic transmission for a vehicle according to claim 4, wherein the gradient is calculated as actual acceleration-calculated acceleration, and the calculated acceleration is calculated as (engine output torque-running resistance) / mass. Way. The run-up control low speed kick-down shift satisfaction condition is determined that the run-up control low speed kick down shift condition is satisfied when the kick-down shift request signal according to the driver's accelerator pedal operation is input while driving. Low speed kick down shift control method of an automatic transmission for a vehicle comprising a. The method of claim 3, wherein the run-up control low speed kick down shift duty control, Controlling the release duty to 100% → the fifth set duty Da; Correcting and outputting the released side duty controlled by the fifth set duty Da as the reverse slope duty in the above step; Performing a coupling side duty control when a predetermined time elapses after the release side inclination control duty is output in the step; If it is determined in the step that the actual turbine speed reaches a predetermined target point according to the vehicle driving state change during the engagement side duty control, after correcting the reverse slope gradient duty to a predetermined sixth set duty (Dr), the Performing a feedback control with the corrected sixth set duty Dr to an initial value; And performing the feedback control in the step, and if the shift synchronization is completed, maintaining the final feedback period for a predetermined time and then reducing the release duty to 0%. Low speed kickdown shift control method. The low speed kick-down shift control method according to claim 8, wherein the reverse slope duty is corrected by a fifth set duty (Dsr) + Δsr (correction duty). 10. The method of claim 8, wherein the sixth set duty comprises correcting to ΔDr (corrected duty) + a reverse inclination final duty. 9. The method of claim 8, wherein the coupling side control duty comprises: outputting a combined duty of 0% at 100% for a predetermined fill time time; After the predetermined fill time has elapsed in this step, the coupling side feedback is performed by reducing the combined duty of 100% to the predetermined tenth set duty Da, and then setting the tenth set duty Da as an initial value. Performing control and determining whether the shift synchronization is completed; If it is determined that shift synchronism is completed in the above step, correcting the end-of-combination duty to a predetermined eleventh set duty De using the coupling-side feedback back final duty as an initial value; After maintaining the eleventh set duty De corrected in the step for a predetermined time, when the predetermined time elapses, the eleventh set duty De is controlled to rise to 100% to control the low speed kick-down shift coupling side. Low speed kick-down shift control method of an automatic transmission for a vehicle comprising the step of completing. 12. The low speed kick-down shift control method according to claim 11, wherein the eleventh set duty includes correcting by ΔDe (correction duty) + coupling side final feedback control duty.