JPS6192353A - Controller for vehicle - Google Patents

Abstract

PURPOSE:To enable both accuracy of control and responsiveness of the controller in the caption to be enhanced by inhibiting input of signals during a period of operational action which may cause error(s) in signal(s). CONSTITUTION:When operation of a clutch 3 and/or speed change operation of transmission gear 4 are/is in execution and for a defined period after the end of the above sorts of operation, entry of car speed signal V into an arithmetic means 9 is inhibited, provided that a brake pedal 11 is not stepped on. Namely, any car speed signal V which may be instantaneously varied due to backlash(es) of the gear of the transmission gear 4 generated by clutch operation and speed change operation is prevented from being input. Accordingly, accuracy of control and responsiveness of the transmission gear can be sharply improved in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a vehicle, and more specifically, to a control device for a vehicle equipped with an automatic transmission that enables stable engine speed control. Regarding.

Conventional technology In recent years, an automatic transmission system has been put into practical use, which uses a conventional manual transmission equipped with seven actuators, and is configured so that the shift lever can be switched to a desired shift position in response to an electric signal. It is being done. This type of automatic transmission is configured to perform a gear shift operation according to the speed of the vehicle, so if a change occurs in the detected vehicle speed data, the gear shift control is performed in response to this. This will have a negative impact on gear shift control. By the way, what about vehicle speed detection?

Generally, this is done based on the rotation of the f-low e2 shaft or output shaft, so the gear change operation or clutch engagement is
/During the disconnection operation, a phenomenon occurs in which the detected vehicle speed instantaneously deviates significantly from the actual vehicle speed due to gears etc. This will cause the above-mentioned problems.

In order to eliminate this problem, in vehicles equipped with this type of automatic transmission, data indicating vehicle speed is averaged by applying a filter with a large time constant, so that the automatic transmission responds to changes in vehicle speed of only a fraction of a decimal point. It is configured so that it does not operate.

However, according to this configuration, if the operating condition of the internal combustion engine suddenly changes due to sudden braking, for example, the data indicating the engine speed will not change due to the sudden change in the operating condition. As a result, the automatic transmission is unable to follow the changes in speed, and the speed change state of the automatic transmission device no longer corresponds to the actual operating state.As a result, the operating state of the internal combustion engine becomes unstable, leading to the engine stopping. Other problems such as this will occur.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vehicle control device that can stably control an automatic transmission even if a signal indicating vehicle speed changes instantaneously for some reason.
I have a lot to offer.

Means for Solving the Problems The configuration of the present invention includes means for outputting a status signal related to the speed of the vehicle, a transmission that operates in response to at least the status signal, and a transmission using gears or the like in the transmission. , ri2tsushi,'
a detection means for detecting execution of a predetermined operation of a predetermined member predetermined as a factor causing the occurrence of t-;
IJ fl 7'--characteristic in that it comprises means for prohibiting it from being used as a blind.

Operation According to the above-described configuration, when a predetermined operation that causes a pack 2 shift due to gears of a transmission, etc. occurs in a predetermined member, the state signal is transmitted at least during the period in which the operation is performed. Since the transmission is prohibited from being controlled based on By removing this, the transmission can be controlled stably (11J). Therefore, it is possible to use the status signal that quickly responds to changes in the speed of the vehicle as is, thereby significantly improving the accuracy and responsiveness of transmission control.

Example The present invention will be described in detail below with reference to an embodiment shown in the drawings.

FIG. 1 shows a schematic diagram of an embodiment of a vehicle control device according to the present invention. The vehicle control device 1 is a device for controlling a transmission 4 connected to the internal combustion engine 2 via a clutch 3 in response to at least the speed of a vehicle driven by the internal combustion engine 2. The vehicle control device 1 includes a vehicle speed sensor 5 that outputs a vehicle speed signal V that indicates the current speed of the vehicle, and an accelerator sensor 7 that outputs an accelerator signal Ai that indicates the amount of operation of the accelerator (dial 6).Vehicle speed The sensor 5 can be, for example, a known vehicle speed sensor attached to a vehicle throttle (not shown). On the other hand, the accelerator sensor 7 is a potentiometer connected to the accelerator pedal 6, It includes a meter (not shown) and outputs an accelerator signal, which is a voltage signal of a level corresponding to the amount of operation of the accelerator pedal 6, and is inputted to the calculation means 9 of the control calculation section 8. -10,000,
The vehicle speed signal V is configured to be input to the calculating means 9 via the inhibiting means 1O.

The inhibiting means 10 outputs a vehicle speed signal vl according to the driving conditions of the vehicle.
The prohibition means 10 is for inputting or prohibiting input to the calculation means 9.

A brake signal B indicating whether or not the brake pedal 11 is depressed is input from the brake sensor 12, and a predetermined signal is input from a predetermined member that causes a pack 2 to occur in a gear or the like in the transmission 4. A detection signal indicating whether or not the above operation is being performed is inputted from the detection means 13.

In the illustrated embodiment, the detection means 13 includes a first signal S1 indicating that the engagement or disengagement operation of the clutch 3 has started.
is input from the first detector 14, and at the same time, a second signal Sl indicating that a speed change operation has started in the transmission 4 is input from the second detector 15. The detection means 13 outputs an amount detection signal when at least one of the first signal Sl or the second signal S2 is input and for a predetermined time after the input stops.

The prohibition means 10 operates to prohibit the vehicle speed signal V from being input to the calculation means 9 when the detection signal B is applied, but when the brake signal B is applied, the inhibition means 10 operates to prohibit the input of the vehicle speed signal V to the calculation means 9 when the detection signal B is applied. Even if the vehicle speed signal V is applied, it operates to input the vehicle speed signal V to the operator fR9.

That is, when the brake pedal 11 is not depressed, the vehicle speed signal is not activated while the clutch lever 3 and/or gear change operation in the transmission 4 is being performed, and only for a predetermined period after these operations are completed. Prohibiting V from being input to the calculation means 92. This prevents the capture of the vehicle speed signal V, which is causing instantaneous fluctuations due to pack lash of the gears of the transmission 4, etc., caused by the shift operation and the speed change operation. in this way,
It is prohibited to take in the vehicle speed signal V not only when the clutch, gear and/or transmission are being operated, but also for a certain period of time after these operations are completed.
Immediately after the operation of the clutch and/or transmission is completed, the operation of the transmission, etc. is still in a transient state, and the vehicle speed signal V will indicate the accurate vehicle speed at that time only after the operation of the clutch and/or transmission is completed. This is because a predetermined period of time has passed since then.

As a result, in the calculation means 9, predetermined control calculations are performed only by signals that accurately indicate the driving state of the vehicle at the time, and depending on the accelerator signal input and the vehicle speed signal V, the optimal gear position at that time is determined. is calculated accurately. The result of this calculation is input to the transmission 4, whereby the transmission 4 is controlled to change speed according to the result of the calculation performed by the calculation means 9.

In this way, since the present device does not average the vehicle speed V by applying a filter with a large time constant, the vehicle speed signal V can accurately capture the vehicle speed at any given time, and therefore, the speed change control can be executed n times better and with better responsiveness. Note that due to the detection signal, the input of the vehicle speed signal V to the calculating means is interrupted for about 1 second, but this device uses the value of the vehicle speed signal V immediately before the vehicle speed signal V is interrupted. The data is stored in memory, and while the vehicle speed signal V is interrupted, speed change control is performed based on this stored data. However, since the change in vehicle speed that occurs during this time is very small, there is no problem with control.

On the other hand, if the brake pedal 11 is depressed,
Since the vehicle speed will change greatly, the vehicle speed signal VtX calculating means performs the input prohibition operation by the inhibiting means 10 even if the detection signal is output and there is a high possibility that an error in the vehicle speed signal VK has occurred. The configuration is such that input is made to 9.

According to such a configuration, the signal related to vehicle speed is not averaged by applying a filter with a large time constant, but the signal is processed during continuous operation, which is an obvious cause of error in the signal. I'm going to prohibit the import of IcL, just in case, the vehicle speed signal is not averaged! Can I use it, therefore? The accuracy and responsiveness of the IJ control are significantly improved, and the gear shift operation can be performed satisfactorily even when the vehicle speed suddenly changes.

FIG. 2 shows a flowchart of an example of a control program constructed using the N' control calculation section 8 and seven microcomputers.

70-Chart [c] in FIG. 2. To explain, after the program starts, it is first determined in step 21 whether or not the brake pedal 11 is depressed.
If the determination result is YES, proceed to step f22, take in the vehicle speed signal V, perform predetermined control calculations,
(Step 23), output data for performing speed change control of the transmission 4, f24), return to Stella 7 #21.

If the x7-tug 210 determination result is NO, it is determined in step 25 whether or not the first signal s1 is output, and if the determination result is YES, the 72g F is set to "1", clear the timer Stella f27), proceed to step 23,
f250 discrimination result is N.

In this case, it is determined in step 28 whether or not the second signal S is output, and if the determination result is YES, proceed to Stella: 1a26, and if the determination result is No, step 28 determines whether or not the second signal S is output. The process advances to f29, and it is determined whether the flag F is OJ or not.

If 7 lag Filrx"cv, sf y 7" 3
01fc>The timer is started and 72gF? Step 31) The timer counts up to a predetermined time, and it is determined whether or not the timer is in the f state (step 32).

If the timer has not timed up yet, step 2
2fr: Proceeds to step 23 without any delay, and the control calculation is executed without taking in the vehicle speed signal V. If the timer times up and there is a fish, the step 320 judgment result is Y.
ES, Stella'') Vehicle speed signal 'yvo' on p22
After the acquisition, control calculations will be performed. If the determination result of Stella f29 is NO, the process directly proceeds to Step 32.

That is, the determination result in step 25 or 280 becomes YES, the timer is cleared (step 27), and the next! A timer is started in the log depletion cycle, and if the timer detects that a predetermined period of time has elapsed since the determination result in step 25 or 28 becomes YES, the process advances to step 22 to capture the vehicle speed signal V. However, if the predetermined time has not yet passed since step 25 or step 280 determination result becomes YEf9, the program proceeds to step f23 without capturing the vehicle speed signal V and waits for the timer to time up. Then, the vehicle speed signal V will be captured twice.

As a result, when the brake pedal 11 is depressed, the vehicle speed signal V is always captured even if the first and second M signals are output, but when the brake pedal 11 is not depressed, the first Alternatively, acquisition of the vehicle speed signal V is stopped while the second signal is being generated and until a predetermined time has elapsed after the generation of the first or second signal has stopped.

Effects According to the present invention, as described above, without applying a filter with a large time constant to a signal related to vehicle speed and averaging it,
By correcting the acquisition of the signal during driving operations that are an obvious source of error in the signal, the non-averaged vehicle speed signal is used for the duration of the control process. The FF degree and responsiveness are significantly improved, and even when the vehicle speed suddenly changes, the shift operation can be carried out smoothly, which is a convenient effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the present invention. Figure 2 shows the control calculation unit shown in Figure 1 in microcore 1.
:#1-7a-Chart showing an example of the control glomodrum when configured in the evening. 1... Single term control device, 2... Internal combustion engine, 3...
4...Transmission, 5...Vehicle speed in centimeters, 8 control calculation unit, 9...Calculation means, 1o...Prohibition means,
Y...vehicle speed signal, ^...accelerator signal, D...detection signal. Patent applicant: Diesel Kiki Co., Ltd. Agent: Patent attorney: Masatoshi Takano Figure 1

Claims (1)

[Claims] 1. means for outputting a status signal related to the speed of the vehicle;
a transmission that operates in response to at least the status signal; a detection means that detects execution of a predetermined operation of a predetermined member that is predetermined as a cause of backlash caused by a gear or the like in the transmission; A vehicle control device comprising: means for prohibiting the status signal from being used as control data for the transmission in response to a detection result of the means.