JPH05213092A - Constant velocity device for vehicle - Google Patents

Abstract

PURPOSE:To give a wide range of choice as for riding comfortableness without addition of any switch. CONSTITUTION:In a constant velocity running device for a vehicle provided with a power mode changeover switch for arbitral selection among several shift patterns a riding comfortableness mode corresponding to a selected shift pattern is set with a mode changeover part 24. A plurality of riding comfortableness modes can be set by making differ any one of elements for deciding the riding comfortableness, i.e., aimed acceleration during acceleration upon constant velocity control operation, control gain of constant running control and over- drive shift control timing. Constant velocity control is carried out with a vehicle speed control part 11 and over-drive control part 12 so as to realize the riding comfortableness mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle constant speed traveling device having a power mode changeover switch for selecting any one of a plurality of shift patterns.

[0002]

2. Description of the Related Art Conventionally, there is a vehicle constant speed traveling device in which a driver selects an arbitrary one from a plurality of shift patterns by a power mode changeover switch and shifts the gear according to the selected shift pattern. In this case, the shift pattern includes a power mode in which an output-priority shift operation is performed, an economy mode in which a fuel economy priority shift operation is performed, and a normal mode in which an intermediate shift operation is performed.

By the way, although some conventional constant speed traveling devices have a function of changing the shift pattern according to the driver's preference, the one designed to reflect the driver's preference with respect to the riding comfort is known. There wasn't.

[0004]

Therefore, there is a problem that the ride comfort is limited to a predetermined one, and the driver's wish cannot be met. Therefore, it is conceivable to newly provide a switch for setting a desired riding comfort, but there is a risk that the cost will increase due to the addition of the switch or the like.

In view of such circumstances, it is an object of the present invention to provide a constant-speed traveling device for a vehicle which allows a certain degree of ride comfort to be selected without adding a switch. I am trying.

[0006]

In order to achieve the above object, the vehicle constant speed traveling device according to the present invention is, as shown in FIG. 1, a power mode switching for selecting any one of a plurality of shift patterns. In the vehicle constant-speed traveling device equipped with the switch 1, a plurality of riding comfort modes in which at least one of a target acceleration during acceleration during constant-speed traveling control operation, a control gain for constant-speed control, and overdrive shift control timing is different are provided. Riding comfort mode selecting means 2 for selecting a riding comfort mode corresponding to the shift pattern selected by the power mode switching switch in response to the operation signal of the power mode switching switch, and running at a constant speed in the selected riding comfort mode. And a constant speed traveling control means 3 for controlling.

[0007]

In the present invention, the constant speed traveling control is performed to provide the riding comfort corresponding to the shift pattern selected by the power mode changeover switch.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 3 is a block diagram showing the configuration of an embodiment of the constant speed traveling device according to the present invention. In FIG. 3, what is surrounded by a dotted line is a controller 10 as a constant speed traveling control means. The controller 10 has a vehicle speed control unit 11 and an overdrive control unit 12.

The vehicle speed control section 11 uses the vehicle speed sensor 13 to detect the vehicle speed signal detected by the speed detecting section 14 and the speed setting section 15.
The throttle control amount is calculated by the deviation signal from the set speed signal from the throttle opening signal from the throttle opening detection unit 16, and the control signal is output to the actuator drive circuit 17 based on the calculation result. The drive of the throttle actuator 18 is controlled to adjust the opening of the throttle 19.

Further, the overdrive (O / D) control unit 12 detects the speed based on the speed signal from the speed detection unit 14, the deviation signal between the speed signal and the set speed signal, and the throttle opening signal. The timing of the overdrive shift is calculated based on the result of the preprocessing by the processing means 20, and the calculation result is input to the automatic transmission control signal generator 21.

The automatic transmission control signal generator 21 outputs an overdrive (O / D) control signal based on the input signal from the overdrive control unit 12, and the automatic transmission control device 22 outputs the overdrive control signal. The shift control is performed based on. The automatic transmission control device 22 in this case is provided with a plurality of shift patterns, and the automatic transmission control device 22 selects the shift pattern according to the operation signal of the power mode changeover switch 23, and shifts according to the selected shift pattern. Take action. Here, as the shift patterns, there are a power mode in which the output-priority shift operation is performed, an economy mode in which the fuel economy priority shift operation is performed, and a normal mode in which an intermediate shift operation is performed.

The controller 10 is also provided with a mode switching unit (riding comfort mode selecting means) 24 for selecting and setting a plurality of riding comfort modes. The mode switching unit 24 has a plurality of different target accelerations during acceleration during constant-speed traveling control operation, control gains for constant-speed traveling control, and overdrive shift control timings (these are three parameters that determine riding comfort). Which outputs a signal for setting the ride comfort mode of the power mode selector switch 23, in response to the operation signal of the power mode selector switch 23, the ride comfort mode corresponding to the shift pattern selected by the power mode selector switch 23 is selected, and the ride comfort thereof is selected. The control signals for realizing the modes are transmitted to the vehicle speed control unit 11 respectively.
Is input to the overdrive control unit 12.

A signal for setting a target acceleration at the time of acceleration during constant speed running control operation and a signal for setting a control gain for constant speed running control are input to the vehicle speed control section 11 from the mode switching section 24. The vehicle speed control unit 11 executes throttle control based on these signals. Further, an on-off determination reference value signal for setting the overdrive shift control timing is input to the overdrive control unit 12, and the overdrive control unit 12 outputs the overdrive shift control timing signal based on this signal. Input to the automatic transmission control signal generator 21 to perform overdrive control.

The power mode changeover switch 2 described above is used.
3 is provided with the select lever 30 as shown in FIG. In addition, the riding comfort mode is as shown in FIG.
Three types are set corresponding to the three shift patterns.

The first riding comfort mode is a "crisp feeling mode" corresponding to the power mode. In this mode, the target acceleration during acceleration is set large, the control gain during vehicle speed control is set large, and the overdrive shift is set to be positively performed.

The second ride comfort mode is a "normal mode" corresponding to the normal mode. In this mode, all the above-mentioned three parameters are set to normal levels.

The third riding comfort mode is the "comfort mode" corresponding to the economy mode. In this mode, the target acceleration during acceleration is set small, the control gain during vehicle speed control is set small, and the overdrive shift is set to be passive.

In the constant speed traveling apparatus of the above embodiment, as shown in FIG. 5, the controller 10 including the vehicle speed control section 11 and the overdrive control section 12 is actually constituted by a CPU (central processing unit) 50. Cage and CPU50
In addition, a vehicle speed detection unit 51, a vehicle speed setting unit 52, and a power mode changeover switch 2 via an interface circuit (I / F).
3, each signal from the throttle 19 is input, and CP
A drive signal is output from the U50 to the automatic transmission control device 22 and the throttle actuator 18.

Next, the operation of the constant speed traveling device will be described with reference to the flowchart of FIG. When auto cruise (constant speed running control) is started, first, in step 101, a normal mode is initialized. In this normal mode, the riding comfort is set to a normal state. After the normal mode is set, it is determined in step 102 whether or not the ride comfort is good, and if it is good, the process ends.

If the ride is not comfortable as it is,
In step 103, it is determined whether or not a comfortable ride is desired, and if NO, step 10
Go to step 4 and set to power mode. Then, in step 105, the target value of acceleration is increased, and in step 106
In step 107, the control gain is increased, and in step 107, the overdrive control is set to the side for positively shifting, and the process returns to step 102. In other words, the ride comfort is set to "Crunch Mode"
To do.

On the other hand, if it is determined in step 103 that a comfortable ride is desired, the process proceeds to step 108 to set the economy mode. Then, in step 109, the target value of the acceleration is reduced, in step 110 the control gain is reduced, and in step 111, the overdrive control is set to the side that passively shifts, and step 1
Return to 02. In other words, the ride comfort is set to "comfort mode".

In this way, the power mode selector switch 2
The ride comfort can be switched by the operation of 3, so that comfortable running can be enjoyed.

In the above embodiment, the case where all three parameters (target acceleration, control gain, overdrive shift control timing) that change the riding comfort are changed for each mode is shown. You don't have to change it.

[0024]

According to the present invention, the power mode changeover switch for selecting the shift pattern also serves as a switch for changing over the riding comfort, so that it is not necessary to add a new riding comfort switching switch. Moreover, since the ride comfort corresponding to the selected shift pattern can be enjoyed by operating the power mode changeover switch, comfortable driving can always be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of the present invention.

2A and 2B are explanatory diagrams of a power mode changeover switch 23 used in one embodiment of the present invention, FIG. 2A is a diagram showing a location, and FIG. 2B is a detailed external view of the switch.

FIG. 3 is a block diagram showing a functional configuration of an embodiment of the present invention.

FIG. 4 is a correspondence table of a shift pattern mode and a riding comfort mode performed in the same embodiment.

FIG. 5 is a block diagram showing an actual configuration of the embodiment.

FIG. 6 is a flowchart showing the operation of the embodiment.

[Explanation of symbols]

 1, 23 Power mode changeover switch 2 Ride comfort mode selection means 3 Constant speed running control means 10 Controller 11 Vehicle speed control section 12 Overdrive control section 24 Mode changeover section

Claims (1)

[Claims] 1. A constant speed traveling apparatus for a vehicle, comprising a power mode changeover switch for selecting an arbitrary one of a plurality of shift patterns, wherein a target acceleration during acceleration during constant speed traveling control operation, and constant speed traveling control. Of a plurality of riding comfort modes in which at least one of the control gain and the overdrive shift control timing is different, and the riding comfort corresponding to the shift pattern selected by the power mode switching switch in response to the operation signal of the power mode switching switch. A constant speed traveling device for a vehicle, comprising: a riding comfort mode selecting means for selecting a mode; and a constant speed traveling control means for performing constant speed traveling control in the selected riding comfort mode.