JPS59168273A - Vehicle speed control device - Google Patents

Abstract

PURPOSE:To prevent running at a speed higher than a dangerous speed by a method wherein an output voltage, proportional to the vehicle speed obtained by a vehicle speed detecting means, is compared with a reference voltage and ignition operation is stopped when the output voltage has exceeded the reference voltage. CONSTITUTION:During the operation of an internal-combustion engine, the output of a generating coil 21 is rectified by a diode 22 and is accumulated in a capacitor 23. An ignition timing control signal is outputted from an ignition timing control circuit 3 in accordance with the output of a signal coil detecting the crank angle of the engine and when a control element 24 is put ON by the same signal, the accumulaed charge of the capacitor 23 is discharged into an ignition coil 25. In this case, the output of a second signal coil 61 is inputted into a vehicle speed control circut 5 and an output is generated from the same circuit 5 when the vehicle speed has exceeded the reference value thereof to put ON the control element 27. According to this method, the output of the generating coil 21 is bypassed and the conduction of the ignition coil 25 is precluded to stop the ignition.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle speed control device for preventing excessive vehicle speed for safety reasons.

Everyone recognizes that excessive speed in vehicles is extremely dangerous for safety. Therefore, there is a need for a vehicle that can prevent the vehicle from going any faster once it reaches a predetermined speed.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology.It prevents the vehicle from traveling above the critical speed, and eliminates the reduction in engine output below the critical speed, thereby affecting the acceleration performance and climbing performance of the vehicle. The purpose of the present invention is to provide a vehicle speed control device that does not

Embodiments of the vehicle speed control device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment. In FIG. 1, 1 is an internal combustion engine that is the power source of the vehicle, 2 is an ignition device that ignites the air-fuel mixture of the internal combustion engine 1, and 3 is a device that operates the ignition device 2 at the ignition timing required by the internal combustion engine 1. , an ignition timing control circuit that operates in response to the output of the crank angle detection means 4 that operates in response to the rotation of the internal combustion engine 1.

Further, 5 is a vehicle speed detection means 6 that operates in response to the speed of the vehicle.
This is a vehicle speed control circuit that generates an output when the vehicle speed reaches a level that should be restricted.

FIG. 2 is an electric circuit diagram showing a specific embodiment of the vehicle speed control device shown in FIG. In FIG. 2, reference numeral 21 denotes a power generation coil of an ignition power generator provided in the internal combustion engine 1. One end of this generator coil is grounded, and the other end is grounded via a diode 22, a capacitor 23, and a primary coil of an ignition coil 25.

The diode 22 is for rectifying the output of the generator coil 21. The capacitor 23 is charged by receiving this rectified output, and the charge in the capacitor 23 is transferred to the control element 24 so as to be discharged to the primary coil of the ignition coil 25 at the timing requested by the internal combustion engine 1. It has become.

The secondary winding of the ignition coil 25 is grounded via a spark plug 26. This spark plug 26 is connected to the ignition coil 25
This is to generate an ignition spark within the cylinder of the internal combustion engine 1 in response to the high voltage of the secondary coil.

The control element 24 is connected between the connection point between the diode 22 and the capacitor 23 and the ground.

The output of the ignition timing control circuit 3 is supplied to the control element 24.

Further, 41 is a first signal coil which is one of the crank detecting means 4. One end of this first signal coil 41 is grounded, and the other end is connected to the diode 31 of the ignition timing control circuit 3.
, is connected to P-) of the control element 24 via a parallel circuit of a capacitor 32 and a resistor 33.

On the other hand, 61 is a second signal coil which is one of the vehicle speed detection means 6. One end of this second signal coil 61 is grounded, and the other end is connected to P of the control element 27 through the vehicle speed control circuit 5.
- Connected to

The vehicle speed control circuit 5 includes an F-V(s) circuit 51 (frequency-voltage conversion circuit) and a comparator 52. Further, the control element 27 is connected between the power generation coil and the ground, and receives the output of the vehicle speed control circuit 5 to bypass the output of the power generation coil 21 at a predetermined time.

The above generator coil 21, diode 22, capacitor 23
, ignition coil 25, spark plug 26, control element 24.2
7 constitutes an ignition device 2.

Next, the operation of the vehicle speed control device of the present invention configured as above will be explained. When the internal combustion engine 1 is rotating, the output of the generator coil 21 is rectified by the diode 22 and stored in the capacitor 23.

Thereafter, the output of the first signal coil 41 that detected the crank angle of the internal combustion engine 1 is connected to the diode 31 and the capacitor 32.
The ignition timing is converted into the ignition timing required by the internal combustion engine 1 by passing through a parallel circuit of the resistor 33 and the control element 24.
When the control element 24 is applied to the dart (control end) of the ignition coil 25, the control element 24 is actuated to discharge the stored charge in the capacitor 23 to the primary coil of the ignition coil 25.

This discharge creates a high voltage in the secondary coil of ignition coil 25, which creates a spark in spark plug 26. This spark causes the air-fuel mixture to explode, causing the internal combustion engine 1 to continue rotating.

Now, the rotational force of the internal combustion engine 1 is decelerated at a predetermined ratio and transmitted to the axle of the car, and the car starts moving.
When the rotation of the internal combustion engine 1 is extremely low, the vehicle stops, and the ratio between the rotation speed of the internal combustion engine 1 and the rotation speed of the axle is varied.

Therefore, since a proportional relationship between the rotational speed of the internal combustion engine 1, that is, the vehicle speed does not hold, the vehicle speed is detected by the second signal coil 61 that responds to the rotation of the axle.

The output of the second signal coil 61 is the F −V (s) circuit 5
1, the signal is converted as shown in FIG. If a reference potential VL is given to the (c) terminal of the comparator 52, when the potential V8 of the (g) terminal of the comparator 52 exceeds the reference potential Vr, that is, when the vehicle speed exceeds 81, the comparator Multiple outputs are output from the output end of 52.

For this reason, the control element 27 is switched to a conductive state, the output of the generating coil 21 is bypassed, and the spark plug 26
ignition spark will no longer occur.

Therefore, the internal combustion engine 1 can no longer continue to rotate, and the speed of the vehicle begins to decrease. When it starts to slow down,
Naturally, the output Vs of the F-V(s) circuit 51 decreases and becomes less than the reference voltage Vt, so the control element 27 becomes non-conductive again, an ignition spark is generated at the spark plug, and the internal combustion engine 1 starts rotating. start. As described above, the vehicle maintains a predetermined speed and does not reach excessive speed.

In the embodiment described above, the output of the generator coil 21 is diverted when the output reaches a critical speed or higher, but as shown in FIG. The control element 28 may be electrically connected to the output of the vehicle speed control circuit 5 to prevent the ignition coil 25 from being energized.

Further, a control element 29 is connected in parallel to the energizing capacitor 23 shown in FIG.
The same effect can be obtained even if the output of the capacitor 23 is made conductive and the current supply to the capacitor 23 is blocked.

Furthermore, the ignition device 2 has the same effect not only by the method called CDI of the embodiment but also by the method of intermittent primary side current of the ignition coil 25 called "Full".

Further, in the embodiments described above, the input of the ignition power source is completely blocked when the vehicle speed exceeds a predetermined speed. Even when it is provided between the control circuit 5 and the control element 27°28.29, the same effect can be achieved.

Furthermore, instead of blocking the input of the ignition power source as described above, the same effect can be obtained by combining means for bypassing or intermittent output of the ignition timing control circuit 3 of the control element 24.

FIG. 6 is a block diagram showing the configuration of still another embodiment of the present invention. In this FIG. 6, the internal combustion engine 1, the ignition device 2, the crank angle detection means 4, the vehicle speed control circuit 5, and the vehicle speed detection means 6 have the same functions as those in FIG. In this case, the outputs of the crank angle detection means 4 and the vehicle speed control circuit 5 are mutually received by the ignition timing control circuit 7 for operation.

Generally, the internal combustion engine 1 has an optimum crank angle ignition position where the highest engine output can be obtained, and that crank angle is usually set as the ignition timing.

In the case of the vehicle speed control device of the present invention, when there is no output from the vehicle speed control circuit 5, that is, when the vehicle speed is below a predetermined speed, the crank angle detection means 4 and the ignition timing control circuit 7 determine the crank angle optimum ignition position as described above. is set as the ignition timing, and when there is an output from the vehicle speed control circuit 5, that is, when the vehicle is at a predetermined speed or higher, the internal impedance of the ignition timing control circuit 7 is changed to set the ignition timing at which the optimum crank angle ignition position is shifted. The circuit is configured so that

In other words, when the vehicle speed is below a predetermined speed, the maximum output of the internal combustion engine 1 is obtained and the speed increases; however, when the vehicle is above the predetermined speed, the output of the internal combustion engine 1 is reduced and the speed is reduced, so the vehicle maintains the predetermined speed. Maintains speed and prevents excessive speed.゛In the embodiment described above, when the vehicle speed exceeds a predetermined speed, the ignition timing is always shifted from the optimum ignition timing. Even if it is provided between the circuit 7 and the circuit 7, similar effects can be obtained.

As described above, according to the vehicle speed control device of the present invention,
The vehicle speed detection means generates an output voltage proportional to the vehicle speed, compares this output voltage with a reference voltage, and when the output voltage exceeds the reference voltage, stops ignition of the internal combustion engine, and the output voltage falls below the reference voltage. Then, the internal combustion engine was started to ignite to maintain the vehicle at a predetermined speed.
In order to ensure the safety of the vehicle, it prevents the vehicle from driving above the critical speed, and since there is no reduction in engine output below the critical speed, it has an excellent effect that does not affect the vehicle's acceleration performance and pitching performance. be.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a vehicle speed control device of the present invention, FIG. 2 is an electric circuit diagram showing a specific embodiment of the main part based on the block diagram of FIG. 3 is an explanatory diagram of the operation in the electric circuit of FIG. 2, FIGS. 4 and 5 are electric circuit diagrams showing the main parts of other embodiments of the vehicle speed control device of the present invention, and FIG. It is a block diagram showing another example of a vehicle speed control device. DESCRIPTION OF SYMBOLS 1... Internal combustion engine, 2... Ignition device, 3, 7... Ignition timing control circuit, 4... Crank angle detection means, 5...
-Vehicle speed control circuit, 6...Vehicle speed detection means, 21...Generating coil, 22.31...Diode, 23.32.
...Capacitor, 24.27-29...Control element, 2
5...1 ignition coil, 26...spark plug, 41...
・First signal coil, 51...V-F circuit, 52.-
Comparator, 61... second signal coil. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno - Figure 1 Figure 2 Figure 3 ■ Figure 4

Claims (4)

[Claims] (1) A power generating coil that generates electricity through the rotation of the internal combustion engine that drives the vehicle, an ignition device that ignites the internal combustion engine based on the output voltage of the power generating coil, an ignition timing control circuit that controls the ignition timing, and the vehicle speed of the vehicle. a vehicle speed detection means for detecting the vehicle speed; A vehicle speed control device comprising: a vehicle speed control circuit that controls the ignition device to stop ignition of the internal combustion engine when the output voltage exceeds a reference voltage, and restart ignition when the output voltage falls below a reference voltage. (2) The vehicle speed control device according to claim 1, wherein the vehicle speed control circuit bypasses the output of the generator coil. (3) Does the ignition system have ignition timing? ! 2. The vehicle speed control device according to claim 1, wherein the ignition timing of the IJ control device button device is also varied from a predetermined position. (4) The vehicle speed control device according to claim 1, wherein the output of the vehicle speed control circuit blocks the output of the ignition timing control circuit.