JPS611546A - Constant-speed driving gear for vehicles - Google Patents

Abstract

PURPOSE:To make decelerating operation performable at once even during constant-speed driving at a jammed superhighway, by installing a reset timing control device which resets a throttle opening controlling device for the constant- speed driving only before completion of the clocking of a timer device. CONSTITUTION:Each output of a car speed sensor 4, a brake switch 5 and a clutch switch 6 is read into a microcomputer 3. From this computer 3, throttle opening command data are outputted on the basis its operation, and these data are fed to a servomotor driver 8 via a digital-to-analog converter 7, thus a throttle valve 10 is controlled for its opening or closing. The repeatedly read car speed is compared with the car speed read in the last time, finding the difference, and the throttle opening corresponding to this difference, thus a fact that an accelerator pedal is reoperated in performing a series of processes is being made sure, so that when the accelerator pedal gets reoperated in the interval till timer counting is over, a constant-speed driving state is released.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention automatically switches the vehicle from the accelerator tracking state on the condition that the vehicle speed is maintained within a predetermined fluctuation range for a predetermined period of time or more. The present invention relates to an improvement of a constant speed traveling device for a vehicle that is configured to shift to a constant speed traveling state.

(Prior art and its problems) As for the constant speed device for medium speeds that is currently in widespread use, when the speed of the vehicle reaches the speed desired by the driver, it stores the medium speed and presses the switch 161ζ. In particular, some vehicles set a vehicle speed and run at a constant speed based on this set vehicle speed.

With this device, after shifting to a constant speed driving state, the constant speed driving state is maintained regardless of whether the accelerator pedal is depressed or pressed back, so the driver has to take care to maintain the vehicle speed at a constant speed. Although the accelerator pedal operation is released, the brake pedal or clutch pedal must be depressed in order to return from a constant speed driving state to an accelerator following driving state, which causes a momentary delay when suddenly accelerating or decelerating. The problem was that this was unavoidable.

Furthermore, in Japanese Patent Application Laid-Open No. 57-122143, the transition from the accelerator following driving state to the constant speed driving state is automatically performed under the condition that the fluctuation in medium speed remains within a predetermined width for a predetermined period of time or more. If you continue to press the accelerator pedal and press the button, the constant speed driving state will be maintained, and if the amount of accelerator pedal depression changes, the constant speed driving state will automatically return to the accelerator tracking driving state. A constant speed traveling device for a vehicle has been proposed.

According to this device, when a sudden deceleration is required while driving at a constant speed, the driver can immediately return from the constant speed driving state to the accelerator following driving state by simply removing his or her foot from the accelerator pedal. This solves the conventional problem of a momentary delay occurring during sudden deceleration, but on the other hand, with the A5, which is currently in widespread use as a constant-speed vehicle driving system, after shifting to a constant-speed driving state, the accelerator pedal cannot be released. If the constant speed running state is maintained even when the J3 is in a state where the foot is off, there is an inconvenience that it will give a feeling of stagnation to general passenger cars.

(Objective of the Invention) The basic object of the present invention is to change the speed from the accelerator following driving state to the constant speed driving state on the condition that the running speed of the vehicle is maintained within a predetermined range for a predetermined time or more. It is an object of the present invention to further improve the usability of a constant speed traveling device for a vehicle that automatically shifts to

In other words, a more specific object of the present invention is to be able to immediately cancel the constant speed driving state in response to the operation of the accelerator pedal for a certain period of time immediately after the transition to the constant speed driving state; After the driving condition has stabilized, the constant speed driving condition will not be canceled even if you weaken the pressure on the accelerator pedal and even take your foot off the accelerator operator (referred to as the depressing back condition). An object of the present invention is to provide a constant speed traveling device for a vehicle.

(Structure of the Invention) This invention will be described in detail with reference to the claim correspondence diagram in FIG.

Thrower for accelerator following driving [-small opening control means a (corresponding to the operation state of the accelerator pedal b, outputs a throttle opening target value based on preset characteristics).

The depressing state detection means C detects that the amount of depressing of the accelerator pedal b has decreased.

The vehicle speed detection means d detects the current traveling speed of the vehicle.

The slower for constant speed running has a state and a reset state, and in the states from Sera 1 to
At the time of hit, J3 (Pull) outputs 1 liter opening target (TJ) which makes the current traveling speed match the traveling speed.

When the constant-speed running throttle opening control means e is in the open pit state, the I-stop drive means f controls the throttle opening according to the throttle opening target value given from the controller 1g. ,
When in the reset state, the opening/closing control of the J-rethrottle valve g is performed to match the throttle opening frame given from the throttle opening control stage a for the accelerator-following running.

The timing control means 11 controls the opening degree of the throttles 1 to 1 for constant speed running, with the detected vehicle speed variation being within a predetermined width for a predetermined period of time or more. Serve the means e.

The timer means 1 detects that a predetermined period of time has elapsed since the throttle opening degree control means e for constant speed running was set to zero.

The reset timing control means J controls the throttle opening control means e for constant speed running in response to the detection of the accelerator pedal depression state only before the timer means 1 completes the reset period. Reset.

(Description of Embodiment) FIG. 2 shows a hardware configuration of an embodiment of the present invention.

In the figure, a pedal potentiometer 1 outputs an analog voltage corresponding to the amount of depression of the accelerator pedal, and this analog voltage is read into a microcomputer 3 via an A7/river converter 2.

The vehicle speed sensor 4 includes, for example, an incremental encoder that is linked to a speedometer cable and outputs a 1<) response sequence with a frequency proportional to the vehicle speed, and a [-/'V converter that converts the output pulse train of this encoder from frequency to voltage. It consists of etc.

Play 1:Swip-5. Clutch switch 6 is
It consists of a microphone switch that generates output when the brake pedal and clutch pedal are depressed.

Soshi-C1 vehicle speed sensor 4. The outputs of the brake switch 5 a3 and the clutch switch O are also read into the microcomputer 3 and processed 4.

Microphone 1' computer 3 outputs throttle opening target value data based on calculations to be described later, and this data is supplied to servo motor 1-lime 8 via D/Δ converter 7. In the small motor driver 8, the actual position of the cylinder valve 10 and the D/A converter 7 are detected.
The servo is applied to the slot Jj given by the slot 1-1 (the target value of the slot is matched with the target value) via the servo
Controls opening and closing of cell '10.

Next, FIG. 33 J5 and FIG.
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When the program starts, first, the output of the pedal potentiometer 1, that is, the accelerator stroke is read through the △, / [) converter 2 (step 100).
).

Next, a target throttle opening is determined based on the read accelerator stroke (step 101). This process of determining the ``1 target throttle opening'' refers to the target throttle characteristics stored in the memory of the microcomputer 3 in the form of a function daple using a daple lookup method. It is done by doing.

Next, the current traveling speed is read through the vehicle speed sensor 4, and a comparison process with the previously read vehicle speed is performed (step 103).

This comparison process, for example, increments a predetermined counter if the vehicle speed difference from the start of a predetermined endurance time is within a predetermined range, and resets the counter if the vehicle speed difference falls outside of a predetermined range. This process is such that the count value of this counter corresponds to the vehicle speed holding time.

Next, it is determined whether or not the vehicle speed has been maintained within a predetermined range over a predetermined period of time.This determination is made, for example, when the old value of the counter reaches a predetermined value. Determine whether or not.

Here, if the medium speed is not maintained within the predetermined range, the process proceeds to step <105>, where the obtained target throttle speed is supplied to the servo motor driver 8 via the D/A converter 7, As a result, the valve 10 is controlled according to the movement of the accelerator pedal).

On the other hand, if it is determined in step (10/I) that the vehicle speed is maintained within a predetermined range, the Achills i-
The o-ri is not zero (step 106), and the iJ3 and accelerator stroke are maintained within a predetermined range (
Under the conditions of step 107), a vehicle speed setting process is performed, step 108>, and then a transition to a constant speed running state is automatically performed.

In this vehicle speed setting process, the vehicle speed at the start of transition to the constant speed driving state is stored as the target vehicle speed in the constant speed driving state.

Here, the feature of the present invention is that the process after the automatic transition from the accelerator following driving state to the constant speed driving state has been improved.

In other words, once the transition to the constant speed driving state is made, for a certain period of time thereafter, the constant speed driving state is released in response to the operation of the accelerator pedal (hereinafter referred to as the accelerator return response mode). ), and after the above-mentioned certain period of time has elapsed, the mode in which the constant speed driving state is not canceled even if the accelerator pedal is pressed back (hereinafter referred to as
This is called accelerator return non-responsive mode).

First, the accelerator return response mode will be explained. When the vehicle speed is set in step (108) and the transition to the constant speed driving state is performed, the brake pedal and clutch pedal are depressed (step 109 is affirmative).
, or unless it is confirmed that the accelerator pedal has been depressed by a certain amount more than the amount at which the constant speed driving started (step 110 is affirmative), the counting process of the timer that determines the duration of accelerator return response mode 1: is stopped. It is performed repeatedly (step 112>, and at the same time step (1141)
The constant speed running basic processing consisting of steps (117) to (117) is repeated.

This constant speed driving basic processing is based on the repeatedly read vehicle speed.
Compare each previously read vehicle speed to find the difference (steps 114, 115), and roughly find the throttle opening corresponding to the vehicle speed difference, that is, the throttle opening required to make the vehicle speed difference zero (steps 114, 115). 7116) and is supplied to the servo motor driver 8 via the D/A converter 7 (step 117).

In addition, the above series of processing (step 109 to step 1)
During the execution of step 17), confirmation is made in step (113) that the accelerator pedal has been pressed back, and the accelerator pedal is pressed back until the timer finishes counting (No in step 111). Then, the timer is cleared (step 118), and the constant speed running state is canceled from then on.
A return to the accelerator following driving state shown in FIG. 3 is performed.

In this way, in the accelerator return response mode, when the brake pedal or clutch pedal is depressed,
The constant speed driving state can be canceled and the accelerator following driving state can be returned based on the satisfaction of any of the following three conditions: the accelerator pedal has been depressed relatively significantly or the accelerator pedal has been depressed back. can.

Next, the accelerator return non-response mode will be explained. In the accelerator return response mode, if the condition in which none of the above three conditions (1) is satisfied continues for a certain period of time, the timer count ends, and from then on, the timer counting process (step 112) t3 and confirmation of the accelerator release operation are performed. The process (step 113) will be skipped.

Therefore, in this state, even if the accelerator pedal is pressed back down, the controller cannot confirm this, and therefore, even if the accelerator pedal is released, the constant speed driving state will not be canceled. do not have.

In this way, in the accelerator return non-responsive mode, the driver can maintain constant speed driving while keeping his or her foot off the accelerator pedal, and can operate the accelerator in the same way as with commonly used constant speed driving devices. It screams to be completely freed from.

(Effects of the Invention) As is clear from the description of the embodiments above, according to the present invention, in this type of automatic transition type constant speed traveling device for a vehicle, an initial certain period of time after transition to a constant speed traveling state is provided. The constant speed driving state can be canceled in response to the operation of the accelerator pedal, and after the constant speed driving state has stabilized for a certain period of time, the constant speed driving state can be canceled even if the accelerator pedal is pressed back. It is possible to prevent the state from being released.

Therefore, on crowded expressways that require frequent brake operations, it is difficult to immediately decelerate even when driving at a constant speed, whereas on expressways that are flowing smoothly, In this system, after the accelerator return response mode continues for a certain period of time, the mode automatically shifts to the accelerator return non-response mode.
yi! I can't resist.

[Brief explanation of drawings]

FIG. 1 is a claim correspondence diagram of this invention, FIG. 2 is a block diagram showing the hardware configuration of this invention, and FIGS. 3 and 4 are flowcharts showing the configuration of a system program executed by a microcomputer. . a...Accelerator) D Throttle opening control means for following driving b...Accelerator pedal C...Depression state detection means d...Vehicle speed detection means e...Standard opening for constant speed driving [) Throttle open degree control means f...
Servo drive means 9...Throttle valve h...Set timing control means i...Timer means j...Reset timing control means Fig. 3-9Q9-

Claims (1)

[Claims] (1) Throttle opening control means for accelerator tracking driving that outputs a throttle opening target value based on preset characteristics in response to the accelerator pedal operating state; It has a set state and a reset state, and in the set state, the current running speed is changed to the current running speed at the time of setting. a constant speed running throttle opening control means for outputting a throttle opening target value necessary for matching the speeds; and when the constant speed running throttle opening control means is in a set state, a throttle opening control means for outputting a target value of a throttle opening necessary for matching the speeds; a servo drive means for controlling the opening and closing of the throttle valve according to a throttle opening target value given by the throttle opening degree given by the throttle opening degree given by the throttle opening degree control means for the accelerator following driving when in the reset state; set timing control means for setting the throttle opening degree control means for constant speed driving on at least the condition that the fluctuation in the vehicle speed maintained within a predetermined range for a predetermined period of time; timer means for detecting that a certain period of time has elapsed since the time when the speed control means was set; and only before the timer means completes timing, in response to the detection of the accelerator depression state, the constant speed A constant speed traveling device for a vehicle comprising reset timing control means for resetting a traveling throttle opening degree control means.