JP2720700B2 - Vehicle control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle control having a function of realizing selection of a plurality of shift ranges in an automatic transmission by electric control and an automatic parking function of guiding a vehicle to a predetermined parking section. Related to the device.

[0002]

2. Description of the Related Art Various types of vehicle control devices having such functions have already been proposed. The present applicant has also proposed an automatic parking apparatus shown in the specification and the drawings submitted in, for example, Japanese Utility Model Application No. 82034 in 1991. In this device, when the shift lever of the transmission is in the parking range position and the system switch is turned on, the automatic parking system is operated to start control for automatic parking. This prevents the automatic parking system from malfunctioning even if the driver accidentally operates the system switch.

[0003]

However, if the driver erroneously operates the shift lever to a range position other than the parking range during operation of the automatic parking system, the transmission is switched to the shift range. As a result,
The vehicle moves in a manner contrary to the driver's intention.

[0004] A technical problem of the present invention is that even if the range select switch is switched to a range other than the parking range during automatic parking, if it is a driver's erroneous operation, control for automatic parking is continued, It is an object of the present invention to control the shift range of the automatic transmission in a normal manner only when the driver intends to do so to prevent the vehicle from moving against the driver's intention.

[0005]

In order to solve the above-mentioned problems, a vehicle control device according to the present invention is configured as follows. That is, a range control unit that outputs an electric signal for switching a shift range of the automatic transmission according to a range signal by a switching operation of a range select switch, the range select switch is switched to a parking range, and an automatic parking start switch is An automatic parking control unit that outputs an electric signal for guiding the vehicle to a predetermined parking section when the vehicle is turned on, wherein the range control unit detects that a foot brake is operated. When a detection signal from a brake detector is input, and the range control unit receives a range signal other than a parking range from the range select switch during automatic parking under the control of the automatic parking control unit, the range control unit activates the foot brake. The shift range of the automatic transmission is And a function of switching control in accordance with Nji signal.

[0006]

In this configuration, even if the range select switch is switched to a range other than the parking range during automatic parking, if the foot brake is not operated at that time, the control for automatic parking is continued and the vehicle moves. To avoid sudden changes. On the other hand, the fact that the foot brake is operated at such a time reflects the driver's intention to interrupt the automatic parking control because the driver feels some inconvenience, and in this case the driver's intention The shift range of the automatic transmission is switched and controlled as usual according to the intention.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a control system diagram of the present embodiment. In this drawing, a range control unit (SBW / ECU) 10 for switching control of a shift range of an automatic transmission and an automatic parking control unit (APS) for controlling the operation of an automatic parking system
(ECU) 20 both use microcomputers.

First, a range control unit 10 includes a range signal (contact signal) of a range select switch 12 which is switched by operating a shift lever or the like and a brake switch as a brake detector which is turned on when a foot brake is depressed. Fourteen on / off signals are input. A control signal corresponding to the range signal of the range select switch 12 is transmitted from the range control unit 10 to the range switching motor 1 in the automatic transmission 30.
6 and the automatic parking control unit 20. The range switching valve (manual valve) of the automatic transmission 30 is switched by the driving of the motor 16, whereby the supply of the line hydraulic pressure of the automatic transmission 30 is switched to set each shift range as is well known. The engagement and release of the friction engagement device is controlled.

On the other hand, the automatic parking control section 20 detects a vehicle speed sensor 22 for detecting the speed of the vehicle, an object detection sensor 26 for detecting the position of a parking garage or the like and an obstacle, and an operation angle of a steering wheel 32. Each detection signal from the steering angle sensor 24 and the automatic parking start switch 27
Is input. This automatic parking control unit 2
0 calculates a relative position between the vehicle and the garage based on a detection signal from the object detection sensor 26, and a steering actuator of the steering 32 based on a control signal based on the calculation result and a detection signal from the steering angle sensor 24. 29 is driven to perform steering control. At the same time, a control signal is sent to the range control unit 10 so that the automatic transmission 3
In addition to switching control of the shift range of 0, the electronic control brake booster 28 is controlled to perform vehicle braking control.

In the above configuration, the range select switch 12 is switched, and the shift range of the automatic transmission 30 is selected based on a control signal output from the range control unit 10 in accordance with the range signal accompanying the change. The control signal is also sent to the automatic parking control unit 20. When the range selection switch 12 is switched to the parking range and the automatic parking start switch 27 is turned on, the automatic parking control unit 20 A control signal for parking is output to the steering actuator 29, the electronic control brake booster 28, and the range control unit 10.

The control for automatic parking and the control for switching the shift range of the automatic transmission 30 will now be described in detail with reference to the flowchart of FIG.

First, in step S1, it is determined whether or not the range signal of the range select switch 12 is a parking (P) range signal. If the determination result is YES, the automatic parking start switch 27 is further determined in the next step S2.
Is determined to be on. If the result of this determination is also YES, that is, if the range select switch 12 has been switched to the P range and the start switch 27 has been turned on, control for automatic parking is executed in step S3 and automatic parking control is performed. to set the permission flag F _L to "1". By executing the automatic parking control, the forward, backward and turning of the vehicle is controlled based on the positional relationship between the vehicle and the garage, and the vehicle is automatically guided into the garage.

If the result of the determination in step S1 is NO, that is, if the range signal of the range select switch 12 is out of the P range, the flow shifts to step S4 to determine whether or not the flag _FL = 1. If the automatic parking control is being performed, the determination result of step S4 is YES, and in this case, the process proceeds to the next step S5, where it is again determined whether or not the range signal of the range select switch 12 is outside the P range. to decide. If non- P range proceeds to step S6, setting the flag F _L to "0".

In step S7, it is determined whether or not the foot brake is depressed based on the detection signal from the brake switch 14. If the result of this determination is YES, it is determined that the driver's intention to interrupt the automatic parking control has been activated, and the process proceeds to step S8, where the shift range of the automatic transmission 30 is switched and controlled as usual. If the foot brake is not depressed, the operation of the range select switch 12 to a position other than the P range is regarded as an erroneous operation by the driver, and the process proceeds to step S10, where the shift range of the automatic transmission 30 is switched to the P range and controlled. . However, if the vehicle has a shift lock function that disables switching between the P range and the other ranges unless the foot brake is depressed, the process of switching to the P range in step S10 is performed by the driver. Is replaced with the warning process.

If the result of the determination in step S2 is NO, that is, if the automatic parking start switch 27 is off, the process proceeds to step S6, and the same processing as described above is performed. If the result of the determination in step S5 is NO, that is, if the range signal of the range select switch 12 is in the P range, the process proceeds to step S9, where it is determined again whether the flag _FL = 1. If the result of this determination is yes, the process moves to step S3 to execute automatic parking control. If the determination result is NO, the control for automatic parking is not being performed even if the range signal of the range select switch 12 is the P range, so the process proceeds to the normal range switching control step and the circulation process is continued. . Note that this is the same after the processing in steps S3, S8, and S10 is completed.

As described above, in the present embodiment, even if the range select switch 12 is switched to a range other than the P range during automatic parking, control for automatic parking is performed unless the foot brake is depressed at that time. Continued.
However, if the driver switches the range select switch 12 to a range other than the P range with the intention of interrupting the continuation of the automatic parking control, the foot brake must be depressed at that time. The shift range of the automatic transmission 30 is switched and controlled as usual in accordance with the intention of the user.

[0017]

As described above, according to the present invention, even if the range select switch is switched to a range other than the parking range during automatic parking, whether the range selection switch is caused by an erroneous operation of the driver or by intention is made. Since the control is continued or the shift range of the automatic transmission is switched and controlled as usual, the movement of the vehicle always becomes appropriate according to the driver's intention.

[Brief description of the drawings]

FIG. 1 is a control system diagram of the present embodiment.

FIG. 2 is a flowchart showing processing contents of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Range control part 12 Range select switch 14 Brake detector (brake switch) 20 Automatic parking control part 27 Automatic parking start switch

Claims (1)

(57) [Claims] 1. A range control unit for outputting an electric signal for switching a shift range of an automatic transmission according to a range signal by a switching operation of a range select switch, wherein the range select switch is switched to a parking range and an automatic An automatic parking control unit that outputs an electric signal for guiding the vehicle to a predetermined parking section when a parking start switch is turned on, wherein a foot brake is operated on the range control unit. The detection signal from the brake detector that detects that
In addition, this range control unit is provided only when the foot brake is operated when a range signal other than the parking range is input from the range select switch during automatic parking under the control of the automatic parking control unit. A vehicle control device having a function of performing switching control of the shift range according to the range signal at that time.