JPS59168237A - Vehicle speed controller - Google Patents

Abstract

PURPOSE:To enable to previously store predetermined kinds of vehicle speeds and enable to easily change the vehicle speed, by a method wherein a plurality of vehicle speed memories and at least three switches are provided, and the memories are made to correspond to the memories, respectively. CONSTITUTION:An electronic cntroller 10 including a CPU is provided, a runaway-detecting circuit 20 is connected to a resetting terminal of the CPU, while a vehicle speed detecting lead switch SW2, a stop switch SW4, a setting switch SW5, a resuming switch SW6 and the like are connected to other input terminals of the CPU through interface circuits IF1-IF5, respectively. The CPU is provided with a plurality of vehicle speed memories, which are made to correspond to the setting switch SW5 and the resuming switch SW6. The data stored in a predetermined one of the vehicle speed memories by operating the setting switch SW5 are read out by operating the resuming switch SW6, and a throttle-driving means including solenoids SL1, SL2 is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle speed control device that stores the speed of a vehicle and automatically maintains the vehicle at a memorized speed, and particularly relates to a vehicle speed control device that stores a plurality of memorized vehicle speeds.

Generally, this type of device detects the current vehicle speed as a number of pulses, and obtains an analog voltage proportional to the number of pulses as a vehicle speed signal. When the driver reaches a desired vehicle speed, he operates a constant speed travel set switch to set (store) the vehicle speed signal at that time in the memory circuit. The speed control device refers to the set vehicle speed signal as a reference voltage on one side of the comparator circuit, and based on the difference between it and the current vehicle speed, adjusts the opening of the throttle valve in a direction such that the difference becomes zero. adjust.

This type of constant speed vehicle traveling device is known from Japanese Patent Laid-Open No. 53-127991 filed by the same applicant and other publications.

By the way, in this type of conventional device, only one type of vehicle speed can be stored. Therefore, for example, if you want to change the vehicle speed from a state in which +n/h is stored in the vehicle speed memory to 60 and the vehicle is being driven under vehicle speed control at that speed to 40 Km/h, -carrier speed control must be canceled. When the speedometer shows 40 km/h, press the set switch again to memorize the vehicle speed and resume vehicle speed control.

However, this type of vehicle speed changing operation is quite troublesome. Vehicles can travel up to 40km depending on the road conditions.
/h, 60Km/h, 8 (lKm/h, etc.) and the vehicle speed is normally driven at this speed limit, so if the control speed changes, the vehicle speed must be changed. However, if you change the vehicle speed and perform a new vehicle speed memorization, the previously memorized vehicle speed data will be erased, so you will have to perform another unusual vehicle speed change operation to return to the original vehicle speed. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle speed control device that can easily change a set vehicle speed even when road conditions frequently change.

In order to achieve the above object, in the present invention, a plurality of vehicle speed memories are provided, at least three switches are provided, and each switch stores (sets) the vehicle speed.

Assign functions such as vehicle speed regeneration (resume) and vehicle speed memory selection. According to this, since multiple vehicle speeds can be stored, for example, the vehicle speed can be set to 40 km/h, 60 km/h, etc.
By setting the vehicle speed to 80 tln/h, etc., the vehicle speed can be easily changed by operating a resume switch or the like according to changes in road conditions.

In one preferred embodiment of the present invention, a vehicle speed memory selection switch, a resume switch, and a plurality of vehicle speed memory selection switches are provided, and when the set switch is operated, the vehicle speed memory corresponding to the state of the vehicle speed memory selection switch is stored at that time. When the resume switch is operated, a vehicle speed corresponding to the contents of the vehicle speed memory corresponding to the state of the vehicle speed memory selection switch is set as a target vehicle speed, and the vehicle speed is controlled according to the target vehicle speed. In this embodiment, multiple vehicle speeds can be stored and reproduced with a small number of switches without impairing the driver's operability.

In another preferred embodiment of the present invention, set switches and resume switches are provided in numbers corresponding to vehicle speed memories, and each set switch and each resume switch are associated with different vehicle speed memories. For example, when the n-th set switch is operated, the current vehicle speed is stored in the n-th vehicle speed memory, and when the m-th resume switch is operated, the target vehicle speed is stored in accordance with the contents of the m-th vehicle speed memory. Set,
The vehicle speed is controlled according to the target vehicle speed.

When storing a predetermined vehicle speed, it is troublesome to operate switches by hand while changing the vehicle speed by operating the accelerator, brake, etc. with one foot. Therefore, in a preferred embodiment of the present invention, when the set switch and the resume switch reach a predetermined state, the vehicle speed is controlled while that state is maintained.
2. Raise or lower. According to this, the driver can easily change the vehicle speed and store the vehicle speed with only his hands without using his feet.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an electric circuit of a vehicle speed control device according to an embodiment.
This will be explained with reference to FIG. In this example, the electronic control device 10 is mainly composed of a single-chip microcomputer CPU. CPU reset boat RES
A runaway detection circuit 20 is connected to ET, and external interrupt input port IRQ and input ports 2. 3. KO and NI1 have interface times ITFI and I, respectively.
F2゜TF3. Via IF4 and TF5, vehicle speed detection reed switch SW2. Clutch switch SW3, stop switch SW4. Set switch S7-W5 and resume switch SW6 are connected,
The input ports R1, R2, R3, R4 and R5 are connected to memory selection switches NSI, NS2 . N83, NS4 and NS5
Connect it.

A permanent magnet connected to a speedometer cable (not shown) is arranged near the vehicle speed detection reed switch SW2, and when the vehicle moves and the permanent magnet rotates, the contacts of SW2 open and close accordingly. When the contact of SW2 changes from closed to open, the output level of the interface circuit IFI becomes low level L, and the microcomputer CPU
An interrupt request is made.

Clutch switch SW3 opens and closes in conjunction with the vehicle's clutch pedal, and stop switch SW4 opens and closes in conjunction with the vehicle's brake pedal. Stop switch SW4
A stop lamp is connected to , and when SW4 is turned on (
(closed), the stop lamp lights up.

Set switch SW5. The resume switch SW8-6 and the memory selection switches NSI to NS5 are push button switches, and are arranged at positions on the instrument panel that are easy for the driver to operate.

Microcomputer CPU output port O.

are connected to the runaway detection circuit 20, and output ports 02 and 03 are connected to drivers DVI and DV2, respectively. A control solenoid SL1 for controlling a negative pressure actuator, which will be described later, is connected to the output of the driver DVI.

The output of the driver DV2 has a release solenoid S[,
Connect 2.

Voltage from the vehicle battery is applied to the control solenoid SL', the release solenoid SL2, and the constant voltage power supply circuit 30 that generates the constant voltage Vcc via the ignition key switch SWI. circuit 40
is for energizing the release solenoid sL2 separately from the operation of the CPU when the brake is applied.

FIG. 2 shows the configuration of the negative pressure actuator 100 controlled by the electric circuit shown in FIG. 1. This will be explained with reference to FIG. The housing 101 consists of two parts Iota and 101b. Diaphragm 102 has two parts 101
a and 101b (7) are held between the 7 langes. A space surrounded by the diaphragm 102 and the housing 101a is a negative pressure chamber, and the diaphragm 102 and the housing 10
The space surrounded by 1b communicates with the atmosphere. 103 is
It is a compression coil spring inserted between the housing 101a and the diaphragm 1.02, and pushes the diaphragm 1.2 back to the imaginary line position when the pressure in the negative pressure chamber is close to atmospheric pressure. A protrusion 104 fixed near the center of the diaphragm 102 is connected to a link of a throttle valve 105. The housing 101a is provided with a negative pressure intake port 107 communicating with the intake manifold 106 and atmospheric intake ports 108 and 109.

110 is a negative pressure control valve, and 111 is a negative pressure release valve, both of which are fixed to the housing 101a. The movable piece 112 of the negative pressure control valve 110 is tiltable about P as a fulcrum, and has one end connected to a tension coil spring 113, and the other end facing the control solenoid SL1. Both ends of the movable piece 112 function as valve bodies, and they open the negative pressure intake port 107, close the atmospheric air intake port +08 (the state shown in the figure), or close the negative pressure intake port 1. 07 is closed, and the air intake port 108 is opened.

The negative pressure release valve Ill also has a movable piece 114°, a tension coil spring 115, and a solenoid SL2 like the negative pressure release valve 110, but the movable piece 114 closes (the state shown in the figure) or opens the atmospheric intake port 1°9. Note that 116 is an accelerator pedal, and 117 is a tension coil spring.

Figures 3a, 3b, 3c, 3d and 3e
The figure schematically shows the operation of the microcomputer CPU shown in FIG. The operation of the CPU will be explained step by step with reference to each episode. Incidentally, when the vehicle is moving, the reed switch SW2 is constantly turned on and off, and each time the reed switch SW2 is turned off, the microphone 11-ro computer CPU executes the external interrupt process shown in FIG. 3d.

First, when the power is turned on, initial settings are performed. That is, the output port is set to the initial level and the contents of the memory are cleared.

Inverts the level of output port Oo. That is, if this port Oo is set to a high level H, the level is set to a low level L, and if it is set to a low level L, it is set to a high level H. This process is always executed at least once within a predetermined period of time if the CPU is operating normally, and as a result, a pulse signal with a substantially constant period is applied to the runaway detection circuit 20 from the CPU. . The runaway detection circuit 20 includes a comparator C when a pulse signal is applied.
Turn on the transistor Q1 by setting the output level of P to H,
The RESIET terminal of the CPU is set to high level H.

However, if the CPU goes out of control and stops generating pulses at port O0, the output level of comparator CP is inverted to L, transistor Q1 is turned off, and a low level L is applied to the reset terminal RESET of the CPU12. − Do. The CPU! J When SET @RESET becomes L.

Since the same operation as when the power is turned on is performed, runaway stops.

If the operation is proceeding normally, the CPU is connected to input port K.
O, K1. 2. 3. It reads the levels of R1-R5, etc., determines the operation of the switches in a primary manner, and performs processing according to the determined switch.

If there is no change in the input (unless a timer, flag, etc. is set), step 52-83-3
4-842-843, executes the multiple storage routine of FIG. 3c, and then executes a processing loop that returns to step S2 again. In this case, the contents of the vehicle speed memory, target value register, flag, etc. do not change.

Clutch switch SW3 or stop switch SW4 is on, or the vehicle speed is below a predetermined value (for example, 30 km/h)
below), the level of the output port is set in the direction in which the solenoid is not energized, and the contents of the target value register RO are cleared in order to cancel constant speed control. Also clear all flags. As a result, if the constant speed driving mode is set, it is canceled. Further, the release solenoid SL2 is activated for a predetermined time so that the negative pressure actuator 100 quickly operates in the direction of closing the throttle valve.
energize. The process then proceeds to steps 842-843, passes through the multiple storage routine, and returns to step S2.

When the set switch SW5 is turned on, the process proceeds to steps 89-817-818-819 for the first time, where the cellar 1-on flag 5ET-ON is set to '11 II' and the control solenoid control duty is set to 5%. When the control solenoid control duty is 5%, the proportion of time that the negative pressure control valve 110 communicates the inside of the negative pressure actuator 100 with the atmosphere increases, so the negative pressure actuator 110 moves in the direction of closing the throttle valve, and the vehicle speed decreases with time. do. Actual control solenoid drive is performed in step S43 according to the set duty.
Let's do it. When set switch SW5 is pressed,
S61-363-872-'S8]... and exits the multiple storage routine, S2-33...S! '3
-8] ]7-86].

When the set switch SW5 is turned off, step 59-
8], proceed as 0-8l l-812-8I3-814,
The set-on flag 5ET-ON is cleared (0) and the set-off flag 5ET-OFF is set to 1. Next, the process proceeds to step S6], and the set-off flag 5ET-OF is set.
Since F is 1, proceed as 569-870-881...
Clear and start the 1-second timer for setting, clear the set-off flag 5ET-OFF to II OII, and clear the contents of the vehicle speed memory designation register RA.

When any of the numeric keys, ie, vehicle speed memory selection switches, is turned on, the program proceeds to 572-871-88] and stores the value corresponding to the turned-on switch in the vehicle speed memory designation register RA.

When one second has passed since the set switch SW5 was turned off, a time over is detected in step S63, and the set switch SW5 is turned off.
Proceed to 64-865-866. By this -15=, the contents of the target value register RO are stored in the vehicle speed memory specified by the contents of the register RA, and after executing a throttle initialization routine to be described later, the operation mode is set to constant speed control mode.

Since the target value register RO stores the vehicle speed at the moment when step 814 is executed, that is, the set switch SW5 is turned off, the vehicle speed at that time is stored in the memory designated by RA.

In this example, switches NS 1. NS2. NS3,
NS4 and NS5 are respectively set to vehicle speed memory 1°2.3.
4 and 5 on a one-to-one basis, for example, after the set switch SW5 is operated, the numeric key 5 (NS5)
When SW5 is turned on, the vehicle speed when SW5 is turned off is stored in the vehicle speed memory 5.

When the constant speed control mode is entered, steps 540-841-8
42, and each time this process is executed, the target value register R is
The control solenoid control duty is reset so that the contents of O, that is, the memory delivery and the current vehicle speed are equal. If the set switch S16-W5 is held down, the control duty remains set at 5% in step S19, so the vehicle speed gradually decreases.

When the resume switch SW6 is turned on, the first time is 33.
Proceed to 1-344-345-846-847-848,
The resume-on flag RESUME-ON is set to 1", and the 0.9-second timer for resume is cleared and started. Then, the processing loop that continues from S61...S8]-882-82 is executed.Resume switch SW6
If is kept pressed (on) for 0.9 seconds,
A time-over is detected in step S47, and the process proceeds to 848, where the control solenoid control duty is set to 90%. Control solenoid control duty 9
At 0%, the negative pressure control valve 110 is activated by the negative pressure actuator 10.
0 is communicated with the negative pressure source (intake manifold), the negative pressure actuator 110
moves in the direction of opening the throttle valve over time, increasing vehicle speed.

When the resume switch SW6 is turned off, first steps S3 +, -832-833-834-835-S
Proceeds to 36... and resumes on flag RESUM
Clear E-ON to “o” and resume
Set the y-lag RESUME-OFF to "1". If the on time of resume switch SW6 is too long,
．． If the 9 second timer times out, 536-83
7-838-839, the current vehicle speed is stored in the target value register RO, and the contents of the target value register are stored in the vehicle speed memory indicated by the contents of RA, in the same way as when the set switch SW5 is turned on/off. Also, the resume-off flag RESUME-OFF is cleared to '10F+ so that normal resume operation is not performed in the multiple storage routine.

If the resume switch SW6 turns off before the 0.9 second timer expires, the resume off flag RE
SUME-OFF is "1", S81-889
-890, clears and starts the 1 second timer for resume, and turns the resume off flag RESUME-OFF.
Clear to II OII.

When one of the numerical keys, that is, the vehicle speed memory selection switch is turned on, the process proceeds from 583 to 892 to 593, and the value corresponding to the turned on switch is stored in the vehicle speed memory designation register RA.

When one second passes after the resume switch SW6 is turned off, the one second timer for resume times out, so S81. -383-884-885-886, and when the vehicle speed memory specified by the contents of registers R and A, for example numeric key NS3, is operated, the contents stored in vehicle speed memory 3 are transferred to the target value register RO. Stored. Then, a throttle initialization routine 886 is executed to set the constant speed control mode. When the constant speed control mode is entered, the process proceeds to steps 840-84]-842-843, and the control solenoid control duty is updated so that the current vehicle speed approaches the contents of the target value register.

The throttle initialization routine will now be described with reference to FIG. 3e. Roughly speaking, this process is a prospective control (open loop control) in order to quickly drive the negative pressure actuator 19-tuator 100 to a predetermined position (throttle initial opening position). That is, the control solenoid control duty is set to a high value (90%), the time to continue this state is calculated in advance according to the contents of the target value register RO, this is set in a timer, and the timer sets the time. Continue the 90% duty control until it becomes over. When the time is over, set the constant speed control flag to set the constant speed mode.

External interrupt processing will be explained with reference to FIG. 3d. This process is to determine the on/off cycle of the vehicle speed detection reed switch SW2. Every time this process is executed, that is, every time SW2 is turned off, the values of the internal timer 1 to 1 are read, and the timer is cleared and started. Furthermore, if the count value of the timer is greater than or equal to a predetermined value (that is, the vehicle speed is less than or equal to a predetermined value), a low speed flag is set. When the low speed flag is set, step S82 of the main routine
0-, the process proceeds to S15, and the constant speed control mode is canceled in the same way as when the clutch pedal or brake pedal is operated.

Next, another embodiment will be described. FIG. 4 shows a schematic configuration of the device. Referring to FIG. 5, in this embodiment, four switches SAI and SA are used as set switches.
2. SA3 and SA4 are provided, and four switches SBI, SB2 . SB3 and SB4 are provided.

A part of the operation of the electronic control device shown in FIG. 4 is shown in FIGS. 5a and 5b. FIGS. 5a and 5b show the operation of the main routine corresponding to FIGS. 3a, 3b and 3c of the embodiment described above. The interrupt handling and throttle initialization subroutines are the same as in the previous embodiment.

To explain the general operation, in this embodiment, each set switch and resume switch are associated with different vehicle speed memories. i.e. SAI and SB
I is vehicle speed memory 1, SA2 and SB2 are vehicle speed memory 2
, SA3 and SB3 are vehicle speed memory 3, SA4 and S
B4 corresponds to the vehicle speed memory 4, respectively. Therefore, for example, if the set switch SA2 is operated, the vehicle speed is stored in the vehicle speed memory 2, and the resume switch SB4 is
By operating , the vehicle speed is controlled according to the contents of the vehicle speed memory 4.

This will be explained with reference to FIGS. 5a and 5b. Set switch SAI, SA2. When either SA3 or SA4 is turned on, steps 52-83-84...59-
817-818-819-820..., set the set-on flag 5ET-ON to 21", and set the control solenoid control duty to 5%. Also, set the numerical value associated with the switch turned on. Store in vehicle speed memory designation register RA. For example, when set switch SA3 is turned on, 3 is stored in register RA.

When the set switch that was turned on turns off, 52-83-
84...59-8IO-5Il-3l, that is, clear the set-on flag 5ET-ON to IIOH, store the current vehicle speed in the target value register RO, and clear the register RA.
After storing the contents of the target value register RO in the vehicle speed memory according to the contents of , and clearing the contents of the register RA, a throttle initialization routine is executed to shift to constant speed control mode.

Resume switch SBI, SB2. SB3 and SB
4 is turned on, steps 531-844-
845-846-847..., sets the resume-on flag RESUME-ON to 1, clears and starts the 0.9 second timer for resume, and sets the value associated with the resume switch that was turned on to the vehicle speed. Store in memory specification register RA. For example, when SBI is turned on, 1 is stored in RA.

When the resume switch that was turned on is turned off, 531-
In steps S32-833-836, the resume-on flag RESUME-ON is cleared to rrOrr. If the resume switch remains on for less than 0.9 seconds, 584-885-886.
..., stores the contents of the vehicle speed memory specified by the contents of register RA in target value register RO, executes a throttle initialization routine, and then shifts to constant speed control mode.

If the ON duration of the resume switch exceeds 0.9 seconds, a time-over is detected in S36 and the process proceeds to steps 537-838. In this case, the vehicle speed at that time is stored in the target value register RO, and the contents of RO are stored in the vehicle speed memory specified by the register RA, as in the case where the set switch is operated. Note that if a time-over occurs, step 848 is executed before performing this process, so the control solenoid control duty is maintained at 90% while the resume switch is on, and the vehicle speed gradually increases.

In the above embodiment, the number of vehicle speed memory selection switches in the former embodiment and the set switch and resume switch in the latter embodiment are set equal to the number of vehicle speed memories, but The number of vehicle speed memories may be increased. For example, in the former embodiment, five vehicle speed memory selection switches (NSI
~NS 5), and there are 32 combinations of on/off states that can be expressed by these switches, so by looking at the states of the 5 switches at the same time, you can select one of the 32 vehicle speed memories. Ru. However, in that case, selecting the vehicle speed memory involves operating multiple switches.
Operability becomes slightly worse.

Furthermore, the above-mentioned embodiment is one aspect of the present invention, and the present invention can be implemented even if the configuration and operation of the device are partially changed, for example, as described below.

a) The throttle drive means is not limited to the negative pressure actuator, but may also be replaced by a motor such as a stepping motor.

b) The electronic control device does not necessarily need to use a microcomputer, but can be constructed from general logic circuits or analog circuits. For example, when configured with analog circuits,
The vehicle speed detection pulse may be passed through an F/V conversion circuit to be converted into a voltage, and the vehicle speed memory may be a sampling and holding circuit using a capacitor, an analog gate, or the like.

C) The vehicle speed detection means may be of any type as long as it can provide a frequency output or an analog output according to the vehicle speed.

d) As for the switch, for example, a set switch and a resume switch are housed in one case, and when the upper part is pressed, the set switch is turned on (resume switch is turned off), and when the lower part is pressed, the resume switch is turned on ( The set switch may be set to OFF). Further, the vehicle speed memory selection switch may be configured like a numeric keypad.

As described above, according to the present invention, a plurality of vehicle speeds can be stored, so if predetermined types of vehicle speeds are stored in advance, the vehicle speed can be changed with a simple switch operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an electric circuit configuration of an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing a negative pressure actuator controlled by the electric circuit of FIG. Figures 3a, 3b, 3c, 3d and 3e
FIG. 1 is a flowchart showing the general operation of the microcomputer CPU shown in FIG. FIG. 4 is a block diagram showing the device configuration of another embodiment. 5a and 5b are flowcharts showing the general operation of the apparatus of FIG. 4. FIG. 10: Electronic control device (electronic control means) 20: Runaway detection circuit 30: Stabilized power supply circuit 100:
Negative pressure actuator (throttle drive means) 101: Housing 102: Diaphragm 103: Compression coil spring 104: Protrusion 105: Throttle valve 106: Intake manifold 107: Negative pressure intake 108, 109: Atmospheric intake 110: Negative pressure control Valve 111: Negative pressure release valve 112.1
1/4: Movable piece 27- 116: Accelerator pedal 117: Tension coil spring SWI: Ignition key switch SW2: Reed switch (vehicle speed detection means) SW3: Clutch switch SW4 Nistop switch SW5: Set switch (first switch means) SW6
:Resume switch (second switch means) SLl:
Control solenoid SL2: Release solenoid CPU: Microcomputer IFI, IF2. IF3. IF4. IF5: Interface circuit DV1, DV2: Toy A
CP: Comparator patent applicant Aisin Seiki Co., Ltd. 298- 28- Procedural amendment (White side November 21, 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Indication of case 1982 Patent Application No. 42828 2, Invention Name Vehicle speed control device 3, relationship to the case of the person making the amendment Patent applicant address 2-1 Asahi-cho, Kariya-shi, Aichi Prefecture Name (001) Aisin Seiki Co., Ltd. Representative Nakai
Reio 4, agent address: 103 Phone: 03-864-6052
Address: 2-27-6-5 Higashi Nihonbashi, Chuo-ku, Tokyo, Detailed description of the invention column and drawing 6 of the specification subject to amendment, Contents of amendment (1) (Error) on the next page and line of the specification. ), (Correct) and 2) Figures 3a, 3b, and 5a of the mouth.
Figures and Figure 5b are corrected as shown in the attached sheet. 7. Attached documents

Claims (10)

[Claims] (1) A throttle driving means connected to a throttle valve; at least three switch means; a vehicle speed detection means; and a plurality of vehicle speed memories; when the switch means is operated,
Distinguishing at least two types of states according to the classification of the activated switching means, storing a value corresponding to the output signal of the vehicle speed detection means in a vehicle speed memory corresponding to the classification of the activated switching means in the first state, In the second state, the contents of the vehicle speed memory corresponding to the classification of the operated switch means are read out, and the throttle drive means is energized according to the contents.
A vehicle speed control device comprising: electronic control means; (2) When the first switch means operates, the electronic control means stores a value corresponding to the output signal of the vehicle speed detection means in a vehicle speed memory corresponding to the state of the other switch means, and the second switch means operates. The vehicle speed control device according to claim 1, wherein the contents of the vehicle speed memory according to the states of the other switch means are then read out, and the throttle drive means is energized according to the read contents. (3) When at least one switch means of the first group is operated, the electronic control means stores a value corresponding to the output signal of the vehicle speed detection means in a vehicle speed memory corresponding to the classification of the operated switch means, and When at least one switch means of the two groups is activated. The vehicle speed control device according to claim 1, wherein the vehicle speed control device reads the contents of the vehicle speed memory according to the classification of the activated switch means, and energizes the throttle drive means according to the contents. (4) When the first switch means is operated, the electronic control means energizes the throttle drive means in accordance with the vehicle speed corresponding to the stored value. Claims (1) and (2)
2) The vehicle speed control device described in item 4 or item (3). (5) The electronic control means biases the throttle drive means in a direction to reduce the opening degree of the throttle valve when the first switch means is in a predetermined state. The vehicle speed control device according to item (2) or item (3). (6) When the second switch means maintains a predetermined state for a predetermined time or more, the electronic control means biases the throttle drive means in a direction to increase the opening degree of the throttle valve while the second switch means maintains the predetermined state for a predetermined time or more. , Claim No. (1)
2. The vehicle speed control device according to item 2, item 2, or item 3. (7) When the second switch means maintains a predetermined state for a predetermined time or more, the electronic control means biases the throttle drive means in a direction to increase the opening degree of the throttle valve while the second switch means maintains the predetermined state for a predetermined time or more. In addition, when the state of the second switch means changes, the vehicle speed at that time is stored in a vehicle speed memory, and the vehicle speed is controlled at that vehicle speed. The vehicle speed control device described in (3). (8) The vehicle speed control device according to claim (1), wherein the throttle drive means is a negative pressure actuator including a negative pressure control valve and a negative pressure control solenoid. (9) The vehicle speed control device according to claim 8, wherein the negative pressure actuator includes a negative pressure release valve and a negative pressure release solenoid that controls the negative pressure release valve. (10) The electronic control means energizes the negative pressure release solenoid when the vehicle is braked.
Vehicle speed control device described in Section 1.