KR19990050721A - Power-off shift shift control device and method - Google Patents

Abstract

The present invention relates to a power-off shift shift control apparatus and a method thereof, comprising: a vehicle driving state sensing means for detecting a signal that is varied according to a driving state of a vehicle and outputting the signal as a corresponding electric signal; When the power off up shift shift occurs on the shift pattern while the driver presses the accelerator pedal and releases the electric signal outputted from the vehicle driving state detecting means, the power off up shift shift control signal is transmitted to the set SS point. The rate of change in engine speed in reserve until reaching ) Is greater than or equal to zero, or the rate of change of turbine speed ( If the rotational speed Nt of the turbine does not reach the SS point even after the maximum retention time Tmax to the SS point has elapsed, it is powered off by the fill time and fill duty set separately in the memory regardless of the SS point set above. Control means for performing an upshift shift control or outputting a power off upshift shift control signal stored in a memory when the turbine speed Nt reaches the SS point set within the power off upshift reservation maximum time Tmax; ; It includes a drive means for performing a power-off up shift shift in accordance with the power-off up shift shift control signal output from the control means, to improve the shift rhythm by performing the power-off up shift immediately without shift delay, There is an effect that can improve the abnormal shift.

Description

Power-off shift shift control device and method

The present invention relates to a power-off shift control device and a method thereof. More specifically, in a vehicle equipped with an automatic transmission, a power-off shift occurs on a shift pattern by the driver stepping on the accelerator pedal. In this case, when the driver stepped on the accelerator pedal a little, the present invention relates to a power-off shift shift control apparatus and a method for preventing the shifting delay while maintaining the power-off state.

In general, a vehicle equipped with an automatic transmission may be operated by automatically shifting the transmission gear to a target shift stage by controlling oil pressure within a shift range set according to the traveling speed of the vehicle and the opening amount of the throttle valve.

Therefore, a vehicle equipped with an automatic transmission in which an operating state is controlled according to hydraulic pressure as described above does not need an operation of a clutch pedal to cut off power from an engine in order to change an operating state of a corresponding shift gear. The driving fatigue can be reduced, and since the engine stall does not occur due to the driver's malfunction or immaturity during driving, the driving operation can be facilitated even for a beginner.

In the automatic transmission, the torque converter changes the rotational power of the engine, and the solenoid valve is controlled by a control signal applied from the shift control device according to the driving state of the vehicle so that the corresponding friction element is operated. A hydraulic circuit is formed to execute automatic shifting operation.

Therefore, the automatic transmission outputs a control signal corresponding to the driver's shift lever selection position, the vehicle speed, and the opening amount of the throttle valve, and the corresponding solenoid valve is driven by the output signal to change the valve port of the hydraulic circuit. And thereby control the operating state of the actuating friction element for selecting one of the gear stages of the gear stage of the transmission gear mechanism by the hydraulic pressure supplied from the oil pump.

The friction element consisting of the clutch and the brake is transferred to the drive gear after the operation state of the planetary gear device is switched according to the selective operation of the friction element, which is changed to an appropriate transmission ratio.

When the variable power is transmitted to the drive gear, the variable power is transmitted to the driven gear which is geared with the longitudinal reduction gear by the driven gear which is geared with the drive gear, thereby controlling the rotational movement of the wheels to ensure stable driving. Achieve a state.

In the automatic transmission operating as described above, when the driver presses the accelerator pedal and releases it, a power-up up shift occurs on the shift pattern. At this time, if the driver presses the accelerator pedal slightly, it is conventionally stored in the memory as shown in FIG. Outputs a duty control signal for power-off upshift control.

However, the above-described conventional technique is that when the driver presses the accelerator pedal and releases the accelerator pedal, when the driver presses the accelerator pedal a little while the power-up up shift occurs on the shift pattern, the RPM of the turbine does not drop completely so that the state of the power does not occur. There is a problem in that the shift is delayed while shifting is maintained while the power-off state is maintained.

Accordingly, an object of the present invention is to solve the above problems, and as shown in the accompanying Figure 2, when the driver turns on the accelerator pedal, the power off up when the shift occurs on the shift pattern. The change rate of the engine speed in the reservation until the shift shift control signal reaches the set SS point ( ) Is greater than or equal to zero, or the rate of change of turbine speed ( If the rotational speed Nt of the turbine does not reach the SS point even after the maximum retention time Tmax to the SS point has elapsed, it is powered off by the fill time and fill duty set separately in the memory regardless of the SS point set above. When the upshift shift control is performed or when the turbine speed Nt reaches the SS point set within the power off upshift reservation maximum time Tmax, the shift delay signal is output by outputting the power off upshift shift control signal stored in the memory. The present invention provides a power-off upshift shift control apparatus and method having an effect of improving a shifting rhythm feeling and improving an abnormal shift by immediately performing a power-off shift shift without a shift.

The present invention for achieving the above object,

Vehicle driving state detection means for detecting a signal that is variable and output according to the driving state of the vehicle and outputting the signal as a corresponding electric signal;

When the power off up shift shift occurs on the shift pattern while the driver presses the accelerator pedal and releases the electric signal outputted from the vehicle driving state detecting means, the power off up shift shift control signal is transmitted to the set SS point. The rate of change in engine speed in reserve until reaching ) Is greater than or equal to zero, or the rate of change of turbine speed ( If the rotational speed Nt of the turbine does not reach the SS point even after the maximum retention time Tmax to the SS point has elapsed, it is powered off by the fill time and fill duty set separately in the memory regardless of the SS point set above. Control means for performing an upshift shift control or outputting a power off upshift shift control signal stored in a memory when the turbine speed Nt reaches the SS point set within the power off upshift reservation maximum time Tmax; ;

It characterized in that it comprises a drive means for performing a power off up shift shift in accordance with the power off up shift shift control signal output from the control means.

Another invention for achieving the above object,

Determining whether a power-off 2 → 3 upshift shift request signal is output when the driver presses the accelerator pedal while releasing the vehicle at a second speed;

When the power-off 2 → 3 upshift shift request signal is outputted, determining whether the rotational speed Nt of the turbine reaches the S.S point arbitrarily set as the same;

In the above case, when the rotation speed Nt of the turbine does not reach the arbitrarily set SS point, the engine speed change rate ( Determining whether) is greater than or equal to zero;

Engine speed change rate ( ) Is greater than or equal to 0, outputting a power-off 2 → 3 upshift shift control signal stored in the memory by a separate fill time and fill duty.

1 is a duty pattern diagram for a conventional power-off up shift shift control,

2 is a duty pattern diagram for power-off shift control in accordance with an embodiment of the present invention;

3 is a block diagram of a power-off shift control device according to an embodiment of the present invention;

4 is a flowchart illustrating a method of controlling a power-off shift shift control method according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention, which can be achieved and realized in detail by the above objects, will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the configuration of the power-off upshift control apparatus according to the embodiment of the present invention,

A vehicle driving state sensing means 10 which detects a signal that is variable and output according to a driving state of the vehicle and outputs the signal as a corresponding electric signal;

When the power off up shift shift occurs on the shift pattern while the driver presses the accelerator pedal and releases the electric signal output from the vehicle driving state detecting means 10, the power off up shift shift control signal is set. The rate of change of engine speed in reserve until the SS point is reached ( ) Is greater than or equal to zero, or the rate of change of turbine speed ( If the rotational speed Nt of the turbine does not reach the SS point even after the maximum retention time Tmax to the SS point has elapsed, it is powered off by the fill time and fill duty set separately in the memory regardless of the SS point set above. Control means for outputting a power-off upshift shifting control signal stored in the memory when performing the upshift shifting control or when the rotational speed Nt of the turbine reaches the SS point set within the power-up-up shift reservation maximum time Tmax ( 20);

It consists of a drive means 30 for performing the power-off up shift shift in accordance with the power-off up shift shift control signal output from the control means 20.

In the above configuration, the vehicle driving detecting means 10

A throttle valve opening degree detection unit 11 for detecting an opening degree of a throttle valve whose opening and closing state is variable in association with an operation state of the accelerator pedal and outputting a corresponding signal;

A vehicle speed detector 12 which detects an output shaft rotational speed of the vehicle and outputs a corresponding signal corresponding to the traveling speed of the vehicle;

A turbine shaft rotation speed sensing unit 13 for sensing a rotation speed of the turbine shaft of the torque converter connected to the input shaft of the transmission and outputting a corresponding signal;

It comprises an engine speed detection unit 14 for detecting the rotational speed of the crankshaft variable according to the operating state of the engine and outputs a corresponding signal.

The power-off upshift shift control method having the above-described configuration will be described with an example of the power-off 2 → 3 upshift shift control method.

If the driver presses the accelerator pedal while releasing the vehicle at the second speed, the control means 20 determines whether a power-off 2 to 3 upshift shift request signal is output (S100).

When the driver steps on and releases the accelerator pedal, an upshift shift signal such as power off 1 → 2, 1 → 3, 2 → 3 or 2 → 4 is generated on the shift pattern according to the current driving shift state.

Therefore, when the power-off 2 → 3 upshift shift request signal is outputted above, it is determined whether the control means 20 has reached the SS point arbitrarily set as shown in FIG. Determine (S110).

In the above case, when the rotation speed Nt of the turbine does not reach the SS point set arbitrarily, the control means 20 changes the rotation speed change rate of the engine ( ) Is greater than or equal to 0 (S120).

Engine speed change rate ( ) Is greater than or equal to 0, the control means 20 outputs the power-off 2 → 3 upshift shift control signal stored in the memory to the driving means 30 by a separate fill time and fill duty. Off 2 → 3 upshift shifting is performed (S130).

However, the engine speed change rate ( If is less than zero, the control means 20 is the rate of change It is determined whether elapsed maximum time Tmax to SS point arbitrarily set (S140).

Rotation rate change rate of the turbine ( If the rotational speed Nt of the turbine does not reach the SS point even after elapsed reservation time Tmax to the arbitrarily set SS point, the power-off 2 stored in the memory by a separate fill time and fill duty 2 → 3 upshift shift control signal is output to the drive means 30, and then power off 2 → 3 upshift shift is performed.

Engine speed change rate ( ) Is greater than or equal to 0 or the rate of change If the rotational speed Nt of the turbine does not reach the SS point arbitrarily set even though the maximum time Tmax has elapsed, the control means 20 is stored in the memory by the separate fill time and fill duty (S130). After outputting the power-off 2 → 3 upshift shift control signal to the drive means 30, the power-off 2 → 3 upshift shift is performed.

But the rotation speed change rate of the turbine ( ) Does not pass the reservation maximum time Tmax, the control means 20 returns to step S110 to determine whether or not the number of revolutions (Nt) of the turbine has reached the SS point arbitrarily set.

However, when the number of revolutions (Nt) of the turbine reaches the SS point set arbitrarily in S110, the control means 20 is the power-off 2 → 3 up stored in the memory as shown in FIG. The shift shift control signal is output to the drive means 30.

However, when the power-off 2 → 3 upshift shift request signal is not output in step S100, the control means 20 returns to the main routine to perform the control.

The above embodiments are described as the most preferred embodiments, and the present invention is not limited thereto, and the embodiments can be easily described from the above embodiments.

As described above, in the embodiment of the present invention, when the driver presses the accelerator pedal and releases the power-off upshift on the shift pattern, the power-off-up shift control signal is reserved until the set SS point is reached. Rate of change of engine speed ( ) Is greater than or equal to zero, or the rate of change of turbine speed ( If the rotational speed Nt of the turbine does not reach the SS point even after the maximum retention time Tmax to the SS point has elapsed, it is powered off by the fill time and fill duty set separately in the memory regardless of the SS point set above. When the upshift shift control is performed or when the turbine speed Nt reaches the SS point set within the power off upshift reservation maximum time Tmax, the shift delay signal is output by outputting the power off upshift shift control signal stored in the memory. It is possible to provide a power-off upshift shift control apparatus and method having an effect of improving a shift rhythm feeling and improving an abnormal shift by immediately performing a power-off shift shift without a shift.

Claims (7)

A vehicle equipped with an automatic transmission, comprising: a vehicle driving state detecting means for detecting a signal that is variable and output according to a driving state of the vehicle and outputting the signal as a corresponding electric signal; When the power off up shift shift occurs on the shift pattern while the driver presses the accelerator pedal and releases the electric signal outputted from the vehicle driving state detecting means, the power off up shift shift control signal is transmitted to the set SS point. The rate of change in engine speed in reserve until reaching ) Is greater than or equal to zero, or the rate of change of turbine speed ( If the rotational speed Nt of the turbine does not reach the SS point even after the maximum retention time Tmax to the SS point has elapsed, it is powered off by the fill time and fill duty set separately in the memory regardless of the SS point set above. Control means for performing an upshift shift control or outputting a power off upshift shift control signal stored in a memory when the turbine speed Nt reaches the SS point set within the power off upshift reservation maximum time Tmax; ; And a driving means for performing a power-off up shift shifting according to the power-off up shift shifting control signal output from the control means. The apparatus of claim 1, further comprising: a throttle valve opening degree detecting unit configured to detect an opening degree of a throttle valve whose opening and closing state is variable in association with an operation state of the accelerator pedal, and output a corresponding signal; A vehicle speed detection unit configured to detect an output shaft rotation speed of the vehicle and output a corresponding signal corresponding to the traveling speed of the vehicle; A turbine shaft rotational speed sensing unit configured to detect a rotational speed of the turbine shaft of the torque converter connected to the input shaft of the transmission and output a corresponding signal; A power-off shift shift control device comprising an engine rotation speed detection unit for detecting a rotation speed of the crankshaft variable according to the operating state of the engine and outputting a corresponding signal. Determining whether a power-off 2 → 3 upshift shift request signal is output when the driver presses the accelerator pedal while releasing the vehicle at a second speed; When the power-off 2 → 3 upshift shift request signal is outputted, determining whether the rotational speed Nt of the turbine reaches the S.S point arbitrarily set as the same; In the above case, when the rotation speed Nt of the turbine does not reach the arbitrarily set SS point, the engine speed change rate ( Determining whether) is greater than or equal to zero; Engine speed change rate ( ) Is greater than or equal to 0, the power-off upshift shifting comprising outputting a power-off 2 → 3 upshift shift control signal stored in the memory by a separate fill time and fill duty. Control method. The engine speed change rate of the engine according to claim 3 ) Is less than 0, the rate of change of turbine speed ( Determining whether e) has passed the reservation maximum time Tmax to an arbitrarily set SS point; Rotation rate change rate of the turbine ( If the rotational speed Nt of the turbine does not reach the SS point even after elapsed reservation time Tmax to the arbitrarily set SS point, the power-off 2 stored in the memory by a separate fill time and fill duty 2 → 3 power-up upshift shift control method comprising the step of outputting an upshift shift control signal. The rotational speed change rate of the turbine according to claim 4 And returning to the step of determining whether or not the number of revolutions (Nt) of the turbine reaches an arbitrarily set SS point when the maximum reservation time (Tmax) has not elapsed. The power-off upshift shifting method according to claim 3, further comprising outputting a power-off 2 → 3 upshift shift control signal stored in a memory when the turbine speed Nt reaches a randomly set SS point. Control method. The method of claim 3 to 4, wherein the separate fill time and fill duty are set in multiple stages according to the vehicle speed (No).