JPS5953910A - Vehicle speed control device - Google Patents

Abstract

PURPOSE:To simplify a speed increasing operation, by providing a timing circuit which is operated for a prescribed time in response to an operation of a resuming switch, and an acceleration signal generating circuit for generating an acceleration signal when time exceeds the prescribed time. CONSTITUTION:When a resuming switch SW2 is closed, a timer of an acceleration signal generating circuit 90 provided with a timing circuit is operated. In case when a closed time of this switch SW2 is shorter than a set a time of the timing circuit, a vehicle speed is reset to a speed before its release. Also, in case of exceeding the set time, the circuit 90 generates an acceleration signal. When this acceleration signal of an L level is generated, an output of a comparator CM becomes an H level, a control solenoid SL1 of an actuator 50 is turned on, opening of a throttle becomes large and the speed is accelerated. This acceleration is continued while the switch SW2 is closed, and at the point of time when the speed reaches a desired speed, the switch SW2 is opened, by which a vehicle is shifted to constant speed running.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to speed setting of a constant speed running N device for both vehicles, which allows the vehicle to travel at a desired target set speed.
The present invention relates to a speed control device related to release.

Typically, this type of device detects the current vehicle speed as a number of pulses and, because of the pulses, obtains a proportional analog voltage as a vehicle speed signal. When the driver reaches the desired MITIi+ speed, operate the constant speed travel set switch to set (memorize) the Jl at that time in the bad circuit. Speed control device G: Using one set of multiplexed signals as the reference voltage for one side of the comparison circuit, the throttle valve is opened in the direction where the difference becomes zero based on the difference between that signal and the current vehicle speed. In this type of device, when the driver is driving at a constant speed as shown in the picture, if the driver continues to press the constant speed traveling set switch and keeps the set switch closed, the M speed will descend and the set speed will be lowered. It has a so-called deceleration set function that rememorizes the vehicle speed between the elbows when the switch is opened and shifts to constant speed driving. Furthermore, some vehicles have a so-called tap-up function that slightly increases the speed of the vehicle when the driver presses the set switch 11J2 while driving at a constant speed. In this way, if you keep pressing the set switch, the speed decreases, -IF? If activated, the speed can be increased.

However, with this tap-up function, the amount of increase in vehicle speed each time is small (from 1 to 5 poles), so in order to significantly increase the vehicle speed, the set switch must be activated repeatedly, making the operation difficult. This has the disadvantage that it is complicated and takes a long time to reach the desired speed.

By the way, in general, there is a constant speed driving system for both East and East vehicles (to prevent danger, etc., even if constant speed driving is set, if the brake is not operated, the constant speed driving will be automatically canceled). Therefore, some vehicles are equipped with a 1-speed switch in order to return the vehicle speed to the memorized target subspeed.

The object of the invention is to simplify the speed increasing operation by providing the resume switch with a speed increasing function during constant speed running.

In order to achieve the above object, a timer circuit that fires for a predetermined period of time in response to the operation of a resume switch;
11. An acceleration signal generation circuit that generates an acceleration signal when the resume switch is operated for more than the predetermined time;
The gist of the composition is to 'mle'.

With the above configuration, when increasing the speed while the driver O is running at a constant speed, press the resume switch P-i Va,
If this operation time exceeds a predetermined time T (TL), speed increase starts, and speed increase continues while the resume switch is operated.
Turn off the resume switch when the desired speed is reached.
If it is TL, the vehicle can move to constant speed driving again at the vehicle speed at that time, and the initial objective will not be achieved. In addition, the present invention requires only a few components in conventional devices. Just add it and implement it, Practical 1 Excellent T1. It has a great effect.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. ■
The frequency of the nth speed signal obtained from the reed switch 10, which is opened and closed by a permanent magnet (not shown) rotating at the same speed as the wheel speedometer cable, is determined by the FV conversion circuit (CfM wave number-voltage conversion circuit) 20. γ1. Ru.

30 is a vehicle speed voltage signal (actual voltage error signal) from the FV change circuit 20. Switch SW1 sets the voltage corresponding to Vv.
(Target vehicle speed storage means) which outputs a storage voltage signal VM that changes with the vehicle speed voltage signal Vv around a certain voltage at the time of storage.
It is 30. In this memory circuit 80, there is a human resistance R5, notation 1.
Capacitor C1 for boiling, F'ET for impedance conversion
The gate of F2 is connected in series, the drain of FET F2 is connected to constant voltage VOO, and the source is connected to ground ξ through resistor R6.
I'm n. F, G1 is a FET for a rotary switch, the drain is connected to the gate of the impedance conversion FET I'2, and a voltage obtained by dividing the constant voltage C by resistors R3 and R is applied to the source.

The gate of FET Fl is connected to a constant voltage VQQ through resistor R2.
and are connected to the collector of transistor T1. The base of this transistor T1 is connected to a constant voltage Vcc via a resistor R1, and is also connected to a set switch SWl via a diode D.

In the 40 Lego comparison circuit, the inverting input terminal of the comparator CM (
-) to which the memory voltage signal VM is applied 2-1. A comparison voltage V, which is a constant voltage Vcc divided by resistors R7 and R8, is applied to the non-inverting input terminal (+) of the CM. The output end of the CM is connected to the power amplifier 60 that drives the control solenoid 5Lli of the vacuum actuator 50.
ing. Further, the output end of CM is connected to a constant voltage Vcc via a resistor R9, and is also connected to an integrating capacitor C2 via a resistor lo. The connection point between the integrating capacitor yc2 and the resistors R and o is connected to the input side of the memory capacitor C1 of the memory circuit 80 via the resistor bjRo.
71. I'm here.

70 is a flip-flop circuit that holds the setting/cancellation state of constant speed running, and the input terminal is connected to the set switch SW1.
．． Resume switch S'vv2. The output terminal of the old 1 and Nant gate 71 connected to the cancel switch SW3 is the non-inverting input terminal of the comparator CM and the integrating capacitor C.
Next to γL diode D5. Contact aE via D6
The output end of each of the five Nant gates 72 is connected to the release solenoid SL2 of the vanim actuator 50 via the power amplifier 80.

Reference numeral 90 denotes an acceleration signal generation circuit including a timer circuit, and the timer operation is started by closing the resume switch SW2. When the closing time of the resume switch SW2 exceeds the set time of the timer circuit 90, the acceleration signal generating circuit 90 generates an 'L level signal which is an acceleration signal. This signal is connected to the diode l)2. It is connected to the base of the transistor T and the integrating capacitor C2 via D3.

100 +1 safety circuit or date, input terminal is connected to resume switch 5W2E and cancel switch SW3, output terminal is feedback to one input terminal 271. ing.

In the above-mentioned configuration, the operation G will be explained next.

The number of opening/closing cycles of the reed switch 10, V', that is, the frequency of the progress signal, is converted into a voltage corresponding to the frequency by the FV conversion circuit 20, and outputted as an electronic vehicle speed signal VV. Then, when the set switch SW1 is closed and the storage instruction signal Hn is applied, the transistor T1
is turned off, and the gate potential of FET Fl becomes upper edge;
The drain and source of TF become conductive. the result,
A source voltage obtained by dividing the constant voltage Vcc by resistor R3, 114 is applied to the capacitor C1 and the gate of FET F2.
'l will be. Based on this source voltage, the voltage Vr
Then, the rest voltage Vv across the capacitor C1 is 1.
-117JLI is self-cooling, so a charge equivalent to the potential difference lVy -Vrl between the capacitors 1 and 1 is accumulated in the capacitor C1. When the storage instruction signal is removed, FEi'
F is turned off again, and since the human input impedance of FET F2 is high, it is connected to its gate. capacitor C,
One end becomes a floating state, and the charge of the capacitor C1 is maintained at the charge just before the storage instruction signal is removed. At this time, the subspeed voltage ■■=vvo and Trl are as follows.
The potential difference V of the capacitor C1 is then l Vvo-V
r I hold myself. Therefore, a voltage of Vv+V (Vv+IVvo-Vrl) is applied to the gate of FET F2, FrL, and a corresponding voltage FB is outputted from the source end of TF2 as the storage voltage VM.

If the storage voltage immediately after storage is VMG, the storage voltage VM becomes higher when the vehicle speed increases and becomes lower when the vehicle speed stops or decreases Tn, centering on the voltage VMo.

The comparison circuit 40 has a non-inverting input of the comparator CM<
+>c, constant voltage Vcc divided by resistors R, , R8j
h constant rvv LF, Vx is applied 71. ing. Furthermore, the m1 memory voltage VM is applied to the inverting input terminal (-).

ing. Therefore, the output i;f of comparator CI',4
, vM (VX's 'H' level, VM>VX's height'
Become L'L/Bell. Upon receiving this output, the power amplifier 60 turns on when the output is 'I Zelepel', and I L
It turns off after reaching I level.

Here, the divided voltage Vxi by resistor 1 (,,,, R8 is set a little higher than the reference voltage Vr by resistors R3 and R4 mentioned above, and the divided voltage E
EVX is set to have a slightly higher Q, and the power amplifier 60 is biased to be turned on after the memory surface is turned on.

Therefore, the power amplifier 60 is turned on, and the control solenoid SL of the vacuum actuator 50 is operated to operate the throttle valve (not shown) in the opening direction. 5. The vacuum actuator 50 is determined by the time of energization to the throttle valve (7,) l1fff and the power supply (J configuration and n).

Next, the output of the comparator Chi is integrated p71 by the resistor O and the capacitor 2, and the output is fed back to the storage capacitor 1 of the 1ψ circuit via the resistor R11. As a result of feedback from the mouth, the vehicle speed decreases, and the voltage of the control solenoid FSL, the voltage of the LIN tortoise capacitor (C2) gradually increases, and this voltage is transmitted through resistor 1 to reduce the vehicle speed at the actual vehicle speed. 'In addition to the pressure Vv, it is also applied to the memory capacitor C1, so a signal indicating that the earth-related force ≦ has increased is output before the vehicle speed voltage Vv reaches the target speed, which is the pressure VM. Since the acceleration is suppressed by 11 degrees, there is no possibility of acceleration exceeding the target speed.

Conversely, if the vehicle speed increases too much, the output of comparator CM becomes L, so control solenoid SL1 is de-energized and the throttle valve operates in the closing direction.
Since the integrated voltage of the capacitor C2 is also lowered, the vehicle speed decreases below the target speed (1), 11, and I)), which becomes a signal that the vehicle speed has decreased to the target speed, and prevents the vehicle from overstepping the second speed. Furthermore, when the set switch SW is closed, the load of this integrating capacitor "2 (7)%T+" is released following the diode 7.

In addition, the FV variable circuit 20υ outputs the ``advance'' voltage signal Vv1. 2 (Since the ripple occurs and the f word also contains a ripple due to the on/off signal of the comparator CM, the output of the comparator CM is < rHl, repeating IL', T control, T line) The duty is under control.

In the flip-flop circuit 70, normally, the output terminal of the Nandts gate 71 is held at the 'H level G', and the output terminal of the Nandts gate 72 is held at the 'L level'2cn. When this poem cancel switch SW is closed, the state J'Q is reversed,
The output terminal of the Nantes gate 71 is at the 'L level, and the output terminal of the Nantes gate 72 is at the 'HI level A. r'J, the non-inverting input voltage of the comparator CM is set to 'L level, and the charge in the integrating capacitor C2 is discharged. Roughly,
Power amp 80'? i: Turn on, energize the release solenoid SL2, and release the throat nottle valve. This reduces constant-speed running by an order of magnitude. after that,
If you want to drive at a constant speed again at the speed before release, close the resume switch SW2 and set the output of the Nantes gate 71 to '1v' and the output of the Nantes gate 2 to 'L#'.
When the release train F 5L2) J is turned off, the reference voltage VV is applied to the comparator CΔ( to release both positive speeds and maintain the speed of Mil.Also, if you want to run at a constant speed at the new set speed is the set switch S~
It is good to change the storage voltage VM by closing vl again.

When the resume m1 switch S W2 f is closed, the timer of the timer circuit 90 of the acceleration signal generating circuit 90, which is 1ttt higher than the timer circuit 90, is activated. If the closing time of the resume switch SW2 is shorter than the set time of the timer circuit 90, the above-mentioned normal speed is returned to the speed before release. Further, when the closing time is equal to or longer than the set time, the GJ acceleration signal generation circuit 90
generates an acceleration signal. This acceleration signal is an 'L# level signal, and this signal is connected to the diode D2. Connected to the base of transistor "rl and capacitor C2 via D3 2
n, I'm here. Therefore, transistors T and G are turned off and FE
TF is turned on, and a reference voltage Vr of 2 Hz' is applied to the base of FFLTF2. In other words, the source of FET F2 is ``i'', so the comparator C is
M compares the reference voltage Vr and the divided voltage Vx. At this time, as mentioned above, since the setting is Vz)Vr, the output of the comparator CM becomes the G;r'H' level, the control solenoid SL1 of the actuator 50 is turned on, the throttle opening is increased, and the acceleration is 1. 'ru. This acceleration &
Golidium Inochi SW2! When the desired speed G is exceeded, the resume switch SW2 is opened.The transistor T is turned on from off to obtain a signal. Move to. At this time, capacitor C2 is connected to diode 13. Through fffl turtle 2n, entry 1 ν 1 time excessive foot pressure (゛tsuku or force) force) 2 nigi 7t
I'm here.

During the above increase 'dL f'E movement, cancel switch 5
Nv3 or closed door (then, Philip 70' knob circuit 7
0 force s, VB moves, constant speed running is canceled In, 6G, the output of the OR gate 100 for the safety circuit becomes IL', and this is maintained. For this reason, the cancellation switch S
Even if W3 is opened, the Philipp flow knob circuit 70 & constant speed running is maintained in the released state. This state (go, resume switch SW, continues between - ears and 7f6. Therefore, if resume switch SW2 does not return to the closed position while driving at a constant speed, 6,000 yen cell switch SVv By closing '3, you can drive at a constant speed or remove one hill from '11, which prevents the danger of not being able to stop accelerating.

[Brief explanation of the drawing]

The drawing is a circuit diagram showing an embodiment of a vehicle speed control device according to the present invention. 20... FV conversion circuit, 30... memory circuit, 40...
・Comparison circuit, 50 ・Paneem complete tuator,
90... Equipped with a timer circuit 7.-) JIJ stray signal generation circuit, 100... Safety circuit, SWl... Set switch, SW2... Resume switch, 5) 11
3... Cancel switch patent applicant Aisin'i "f Iso Co., Ltd. Representative Reio Nakai

Claims (1)

[Claims] A comparison circuit that generates a speed difference signal when a speed difference occurs between a vehicle speed yL signal corresponding to the vehicle speed and a set vehicle speed signal corresponding to a desired set speed; In a vehicle speed control device, the vehicle speed control device includes an actuator that adjusts the relationship of a throttle valve in order to increase or decrease the vehicle speed in a direction that eliminates a difference signal, and a resume switch that restores constant speed running once released. A vehicle speed control device comprising: a timer circuit that operates for a predetermined time in response to /g; and an acceleration signal generating circuit that generates an acceleration signal when a nil resume switch is operated for a predetermined time or more.