JPH01114542A - Constant speed traveling controller for vehicle - Google Patents

Abstract

PURPOSE:To prevent the generation of the not-anticipated acceleration by nullifying the operation of a restoration means when the restoration operation by a resume switch is not performed even if the constant speed traveling control releasing state continues for a prescribed time by the brake operation, etc. CONSTITUTION:A constant speed traveling control means B drives a throttle valve A according to the difference between an aimed car speed set by a car speed setting means D and the actual car speed detected by a car speed detecting means C, and controls the output of an engine E so that the set car speed is realized. A releasing means F releases the constant speed traveling control state by the brake operation, etc., and when a resume switch G is operated in this state, a return means H sets the original set car speed again through the constant speed traveling control and performs restoration. When, a restoration signal is not inputted from the restoration means within a prescribed time after the release by the releasing means F, a restoration nullifying means J sets the operation of the restoration means ineffective, and the restoration to the constant speed traveling control is regulated. Therefore, the generation of the not-anticipated acceleration due to the inadvertent restoration operation can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a constant speed driving control device for driving a vehicle at a set speed.

(Prior Art) Conventionally, constant speed traveling devices for vehicles equipped with a vehicle speed setting switch and an acceleration switch are known (see, for example, Japanese Utility Model Application No. 57-184228).

When the above-mentioned vehicle speed setting switch is operated while the vehicle is running at a predetermined speed, it sets the current vehicle speed as the target vehicle speed in constant-speed running control, and when the acceleration switch is operated while the vehicle is running at a constant speed, it accelerates the vehicle. , the vehicle speed when the operation is released is set as the target vehicle speed for constant speed driving control.

When the target vehicle speed is set by the vehicle speed setting switch or the acceleration switch, the constant speed cruise control device performs feedback control of the engine output by comparing it with the actual vehicle speed so as to maintain the target vehicle speed without operating the accelerator pedal. It is something to do.

In addition, in constant speed driving control as described above, the constant speed driving control is stopped by operating the brake or clutch, etc., and then when the resume switch is operated, the original target vehicle speed is reset and the constant speed driving control is returned to. A coast switch is also provided for deceleration.

(Problem to be Solved by the Invention) However, in the above-described constant speed cruise control, when the constant speed cruise control is canceled due to brake operation, etc., the throttle opening degree is adjusted in response to accelerator operation. Since the mode switches to control mode and normal control is performed, if you forget that it is possible to return using the resume switch and operate the resume switch carelessly without being aware of the return operation due to an erroneous operation, the return operation will be disabled. This may result in unexpected acceleration conditions.

In other words, when the constant speed cruise control is released due to a brake operation, etc., the main switch of the constant speed cruise control is turned off and the control ends, or the vehicle speed decreases and the constant speed cruise control conditions are no longer satisfied. , the operation of returning to constant speed driving control is not performed by the subsequent operation of the resume switch, but due to various conditions during driving, you may forget that it is possible to return to the state, or you may change the previously set target vehicle speed. If the return operation is performed inadvertently due to forgetting, the above-mentioned unexpected acceleration state will occur.

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a constant speed cruise control device for a vehicle that limits the state in which the constant speed cruise control is released so that it can be restored to avoid acceleration due to an inadvertent return operation. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, the constant speed cruise control device of the present invention has the following features:
A canceling means for canceling the constant speed driving control by a predetermined operation of a brake or the like, and a return means for restarting the constant speed driving control at the original set vehicle speed from the canceled state by operating a resume switch, and The present invention is configured to include a return disable means for disabling the subsequent operation of the return means when a return signal from the return means is not input within a predetermined time after the constant speed running control is canceled.

FIG. 1 is an overall configuration diagram for clearly showing the configuration of the present invention.

A constant speed running control means B is provided for an engine E of a vehicle, which adjusts the opening degree of a throttle valve A to bring the engine E into a predetermined output state and maintain the running speed of the vehicle at a target vehicle speed. This constant speed running control means B receives signals from a vehicle speed detection means C for detecting the actual vehicle speed and a vehicle speed setting means for setting the target vehicle speed, and adjusts the target throttle opening according to the deviation between the actual vehicle speed and the target vehicle speed. is set, and the throttle valve A is driven to this opening degree.

Further, a release means F is provided for releasing the constant speed travel control state by the constant speed travel control means B by a predetermined operation of a brake or a clutch, and in the released state by the release means F, a resume switch G is operated. A return means H is provided for resetting the constant speed travel control by the constant speed travel control means B to the original set vehicle speed. The return signal of the return means H is output to the constant speed running control means B via the return disabling means J, and the return disabling means J
When a return signal from the return means H is not input within a predetermined time after the constant speed running control is canceled by the release means F, the subsequent operation of the return means H is disabled and the return to the constant speed drive control is restricted. It is something to do.

(Function) In the constant speed running control device for a vehicle as described above, the constant speed running control by the release means accompanying brake operation etc. is released, and when the resume switch is operated within a predetermined time, the constant speed driving control is resumed by the return means. After returning to travel control, the speed is controlled to maintain the actual vehicle speed at the original target vehicle speed, but if there is no return operation by the return means even if the released state continues for a predetermined period of time, the return means is operated thereafter. is disabled to prevent the occurrence of sudden acceleration due to an inadvertent return operation if the driver forgets that the vehicle is in the released state or forgets the original target vehicle speed.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 2 is an overall configuration diagram of a specific example. In this embodiment, the engine output is controlled by a throttle control that electrically controls the opening degree of the throttle valve according to the amount of depression of the accelerator pedal, and constant speed driving is controlled. An example of vehicle speed control using an automatic transmission equipped with a speed change control means that performs switching control will be described below.

A throttle valve 3 for adjusting the amount of intake air is interposed in an intake passage 2 of the engine 1, and the throttle valve 3 is driven to open and close by a throttle actuator 4 such as a DC motor. The automatic transmission 5 also includes a plurality of shift solenoids 6a.
- 6c and a lock-up solenoid 7, and the hydraulic circuit is switched by a combination of ON and OFF of the shift solenoids 6a-6c, and a plurality of hydraulic fastening hands are selectively tightened.

By being connected, the transmission mechanism is operated to switch to a plurality of gear stages. Further, a lock-up clutch (not shown) in the torque converter is engaged or released by turning on or off a lock-up solenoid 70.

A controller 8 is provided for outputting a throttle control signal a1, a shift control signal and a lock-up control signal C to the throttle actuator 4 and the solenoids 6a to 6c and 7 of the automatic transmission 5, respectively. The controller 8 receives a vehicle speed signal Vn from a vehicle speed sensor 9 that detects the vehicle speed, and an accelerator pedal °10.
an accelerator opening signal α from an accelerator sensor 11 that detects the amount of depression (accelerator opening); a brake signal BR from a brake switch 12 that detects a brake operation;
Throttle sensor 13 that detects the opening degree of throttle valve 3
The throttle opening signal TH from , the gear position signal GP from the gear position sensor 14 that detects the shifting position of the transmission 5, and the shifting mode signal M from the mode switch 15 are each manually input, and the constant speed Main switch 16 and set switch 17 as travel operation switches
, resume switch 18, and coast switch 19, respectively.

Next, the processing of the controller 8 will be explained according to a flowchart.

FIG. 3 shows the main routine, in which the controller 8 performs a predetermined system initialization (step Sl) at the start of operation, reads detection signals from the various sensors, and inputs various information necessary for control from these ( S
2).

Step S3 is automatic speed control (AS) including constant speed driving control.
It is determined whether or not the conditions for starting C) are satisfied.The starting conditions for this automatic speed control are that the main switch 16 is on, the shift position is in the D range, and the vehicle speed Vn is at the set value ( For example, if the speed is 40 km/h or more. Further, the conditions for canceling the automatic speed control are when the above-mentioned start condition is not satisfied or when the brake is activated.

Then, when this automatic speed control condition is satisfied, the automatic speed control is started, and the set switch 17 and the resume switch 18
, performs mode setting control such as vehicle speed feedback control mode, acceleration mode, etc. in response to coast switch 19 operation, accelerator and brake operation (S4), and performs setting control of target throttle opening To corresponding to each mode (S4).
S5).

Furthermore, if the automatic speed control conditions are not satisfied, the routine shifts to normal throttle control, and the throttle opening degree To is set and controlled based on the accelerator operation amount (S6).

The throttle control signal a corresponding to the target throttle opening To set in step S5 or S6 as described above is output to the throttle actuator 4 (S7), the throttle valve 3 is operated to the target opening TO, and the vehicle speed V
ns Each solenoid 6a to 6c of the automatic transmission 5 sets the gear position according to the throttle opening TH, the accelerator opening α, etc.
Performs speed change control to output control signals S and C to S7.
8).

Furthermore, an acceleration timer Tac is used to perform delay processing to be described later.
Then, a release timer Tre is counted up to invalidate the release (S9), and the above routine is executed every predetermined time (for example, 30 m5ec).

FIG. 4 shows a mode setting subroutine for automatic speed control in step S4 of the main routine. In step SlO, which corresponds to step S3 of the main routine, it is determined whether or not the automatic speed control start condition is satisfied, and when the automatic speed control condition is satisfied, the ON state of the set switch 17 is determined (5ll), If it is turned on, set the start flag SF (5L2) and the acceleration timer T.
It is determined whether the ac reset condition is met, that is, whether the target vehicle speed VO has not been set up to that point (S13).

For example, if the target vehicle speed Vo is to be set by the current operation of the set switch 17 immediately after the main switch 16 is operated or after the automatic speed control is canceled by the brake operation, the acceleration timer is set in step S14. Reset Tac to 0. Also, since the brake release state is ended, the brake release flag BF should be reset (S15), and the target vehicle speed Vo should be updated with the actual vehicle speed Vn (31B), so that the updated vehicle speed when the set switch 17 is turned off is The set target vehicle speed becomes vO.

When the target vehicle speed Vo is set as described above, the brake and accelerator are not operated (S1g, 519) and the set switch 17 is determined to be under automatic speed control according to the determination that the start flag SF is set in step S17.
, coast switch 19, and resume switch 18 are not operated, N in steps S20 to S24
The vehicle speed feedback control mode (2) (constant speed driving control) is entered by the o determination.

Although the detailed routine of this vehicle speed feedback control mode (■) is not shown, in order to achieve the target vehicle speed vO by Pl-PD calculation etc. based on the deviation between the actual vehicle speed Vn and the target vehicle speed VO and the amount of change in the actual vehicle speed Vn, etc. Feedback control is performed to calculate the necessary throttle opening Tv and set it as the target throttle opening To.

Further, when the brake is operated during the vehicle speed feedback control, the brake release flag BP is set as determined in step S18 (525), and the resume switch 18
528), it is determined in step S27 whether the value of the release timer Tre exceeds the set value Tst, and initially if the determination is No, automatic speed control is performed in step S31. For restarting, the normal throttle control mode I is set by substituting the steady driving opening Tcon (described later) into the target throttle opening Tv.
to move to. Even if the brake operation is completed, the vehicle speed feedback control is stopped (S24) and the normal throttle control mode I is continued.

When the resume switch 18 is operated in the above state, the process moves to resume switch operation C in step S22, and as described later, the process moves to vehicle speed feedback control (■) or acceleration control (2) depending on the vehicle speed deviation, and returns to automatic speed control. However, after the brake is released, the set time Tst
If the resume switch 18 is not operated even after the elapse of 52111), the brake release flag BF and the start flag SF are reset by the YES determination in step S27 (52111), and from then on, the N in step S17 is reset.
According to the o determination, even if the resume switch 18 is operated, the transition to the resume switch operation C is not made, and the return operation is invalidated.

Although the detailed routine of the normal throttle control mode I is not shown, the accelerator opening degree α is detected, a map corresponding to the shift mode M (economy, normal, power) and when the accelerator is released is selected, and the accelerator opening degree α is The basic throttle opening degree Tb corresponding to the gear position is determined, and various corrections such as accelerator depression speed correction, vehicle speed correction, and water temperature correction are performed on this to set the target throttle opening degree To.

Note that even if the automatic speed control conditions are not satisfied in step SlO, after each flag is reset (S30), and even if the determination in step S17 is NO and the target vehicle speed VO is not set, A transition is made to the normal throttle control mode I described above.

Furthermore, the details of the resume switch operation C accompanying the ON operation of the resume switch 18 in the release state associated with the brake operation are shown in FIG. Set (S41). By setting this resume flag RF, during acceleration to the original target vehicle speed Vo, step S
23 is held to hold the resume operation. Subsequently, in step S42, the target vehicle speed Vo and the actual vehicle speed vn
It is determined whether the deviation from Finish the release operation and shift to vehicle speed feedback control mode ■. On the other hand, if it has not converged, the target throttle opening T is set so that the mode shifts to acceleration mode (2) and acceleration is performed at a constant acceleration up to the target vehicle speed VO.

This is to set.

The above acceleration mode (■) is shown in FIG. 6. First, the actual vehicle speed Vn is input (550), and it is determined whether the correction flag UF is set (551), and it must be reset at the time of transition to the acceleration mode. , initially step 85
2 to 55, the current target throttle opening Tv and actual vehicle speed V
Flat ground steady running throttle opening degree Tcon (
The load compensation opening degree Tdis corresponding to the slope running condition etc. is determined from the difference between the After that, in order to shift to vehicle speed feedback control, the flatland steady running opening Tcan corresponding to the actual vehicle speed Vn is set to the target throttle opening T.
Substitute for V (558) and set the correction flag UF (
S57). Then, in steps 358 to 61, the target throttle opening To is set by the sum of the load compensation opening Tdis and the throttle opening T res for constant acceleration on flat ground to accelerate the vehicle at a constant acceleration. .

On the other hand, in the routine shown in FIG. 4, if the accelerator operation is greater than a predetermined value (α-5%) during constant speed driving control, if the brake is not being released as determined in step S19 (S
29), the accelerator acceleration flag A is set in step S32.
Set F and shift to accelerator acceleration mode ■. Although the detailed routine of this accelerator acceleration mode■ is not shown,
Target vehicle speed V in previous vehicle speed feedback control
Input the throttle opening Tv corresponding to o, and find the basic throttle opening Tb corresponding to the depressed accelerator opening α, and calculate the target throttle opening To by the sum of the two.
This is to set.

Also, during vehicle speed feedback control, the set switch 17
When is operated, set switch operation processing A is performed by YES determination in step S20. Although the details of this set switch operation processing A are not shown, in response to the ON operation of the set switch 17, it is determined whether or not the acceleration timer Tac exceeds a set value (delay time), and if the value is exceeded, the acceleration is accelerated. Since this is a request, a shift flag for downshifting is set, and the transition is made to the acceleration mode (2). Also,
If the timer Tac does not exceed the set value, no acceleration is performed, the shift flag is reset to prohibit downshifting, and the vehicle speed feedback control mode is set.
Move to.

Next, in the vehicle speed feedback control, when the coast switch 19 is turned on for deceleration, coast switch operation processing B is performed by YES determination in step S21. Although details of this coast switch operation processing B are not shown, the target vehicle speed V is determined in response to the ON operation of the coast switch 19.

Update and switch to coast mode. Although the details of this coast mode are not shown, during the coast switch operation, the target throttle opening To is set to O, and the throttle valve 3 is set to O.
is fully closed to perform deceleration, set the actual vehicle speed Vn when the coast switch 19 is off to the target vehicle speed vO, and return to vehicle speed feedback control.

Next, FIG. 7 shows a speed change control subroutine in step S8 of the main routine, in which it is determined in step S70 whether or not automatic speed control is being performed. If the accelerator is not operated, the set switch 17, coast switch 19, and resume switch 18 are not operated, and the brake is not being released and the accelerator has not been accelerated,
In step S77, vehicle speed feedback shift control is performed,
Switching between 3rd speed and 4th speed is controlled according to vehicle speed Vn and throttle opening TH. Also, after accelerating the accelerator (876), the deviation between the target vehicle speed Vo and the actual vehicle speed vn is a predetermined value (for example, 2
kII/h), the accelerator acceleration flag A is set.
F is reset (S78.579) and vehicle speed feedback shift control is performed.

On the other hand, even during automatic speed control, if the accelerator opening α exceeds a predetermined value (S71), or if the brake is being released (S
75), if the vehicle speed has not converged after accelerating the accelerator (
S 78) and when not in automatic speed control (S 70
), normal speed change control is performed in step 880, and this normal speed change control is performed based on a speed change pattern according to vehicle speed Vn and accelerator opening degree α.

When the set switch 17 is operated for acceleration while the vehicle speed feedback shift control is being performed, a YES determination in step S72 causes the process to proceed to step S81, where set shift control is performed. This set shift control is for downshifting the gear stage from 4th gear to 3rd gear. Further, when the coast switch 19 is operated for deceleration, a YES determination in step S71 causes the process to proceed to step S82, where coast shift control is performed. This coast shift control shifts down the gear stage to 3rd speed to increase engine braking. Further, if the resume switch 18 is operated to reset the target vehicle speed after the brake is released, and a resume operation is in progress, a YES determination in step S74 causes the process to proceed to step S8.4, where resume shift control is performed. This resume shift control is to downshift the gear stage to third speed and bring the vehicle into an acceleration state.

According to the embodiment described above, while constant speed driving control is canceled due to brake operation, the return operation is performed only when the resume switch 18 is operated within a predetermined time, and after the set time has elapsed, the automatic speed control system is stopped. Switching to the normal throttle control system disables the operation of the resume switch 18 and does not return to constant speed running control, thereby reducing the chance of inadvertent transition to acceleration mode due to erroneous operation of the resume switch 18.

In addition, in the above embodiment, constant speed driving control of a vehicle equipped with an automatic transmission is shown, so constant speed driving can only be canceled by brake operation, but in the case of a manual transmission, in addition to the brake operation, the constant speed driving can be canceled. Constant speed driving control can also be canceled by operating the clutch.

(Effects of the Invention) According to the present invention as described above, the constant speed running control is canceled by the release means in response to a brake operation, etc., and the original target vehicle speed is returned to the original target vehicle speed by the return means in response to the resume switch operation within a predetermined time. Regarding the return to constant speed running control, if there is no return operation by the return means even if the canceled state continues for a predetermined period of time, the subsequent operation of the return means is disabled by the return disabling means. If a considerable amount of time has elapsed since the release and the driver forgets that the release has been released and performs the reset operation by mistake, or if the driver misidentifies the original target vehicle speed and performs the return operation, the driver This reduces the possibility of unexpected acceleration occurring and ensures constant speed driving control that meets the driver's requirements.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram to clarify the configuration of the present invention, Fig. 2 is a control system diagram in one embodiment, Fig. 3 is a main flowchart showing the overall control operation, and Figs. 4 to 7. is a flowchart of the main parts of each control section. E, 1...Engine, B...Constant speed running control means, F...Cancelling means, G, 18...
・Resume Sochi, H・・・・・・Method of return,
J... Return invalidation means, 8... Controller. Figure 1 Figure 3 Figure 6

Claims (1)

[Claims] (1) A vehicle equipped with a release means for canceling the constant speed driving control by a predetermined operation of the brake, etc., and a return means for restarting the constant speed driving control at the original set vehicle speed from the above-mentioned released state by operating a resume switch. In a constant speed cruise control device,
The vehicle is characterized in that a return disabling means is provided for disabling the subsequent operation of the return means when a return signal from the return means is not input within a predetermined time after the constant speed running control is canceled by the release means. Constant speed driving control device for vehicles.