JPS6353045B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic engine starting device for a vehicle.

A system that starts the engine before the driver installs it and performs heating, cooling, defrosting the windshield, removing ice and snow, etc. before the start of operation has been proposed. A system that starts the engine from a remote location using radio waves has been proposed. ing. However, this system not only requires special transmitting and receiving equipment, which increases costs, but also has limitations in controlling engine starting from inside concrete buildings, where radio waves have difficulty passing through, and from remote locations. It was hot.

The present invention has been made in view of these points, and provides an automatic engine starting device that solves the above-mentioned problems by automatically starting the engine at a predetermined time. It is to provide.

Hereinafter, the present invention will be explained with reference to Examples. 1st
The figure shows one embodiment of the present invention, and the watch 1 is equipped with a clock key 1a, a timer key 1b, a set key 1c, a reset key 1d, and a numeric keypad group 1e. The starting time or time is set, and when the set time is reached, an H (high level) signal is output for a moment. Note that the above set contents can be canceled by operating the reset key 1d. Timer 2 has reset priority, and output Q is set to H until about 10 minutes have elapsed since the H pulse was input to the S input. Neutral switch 3 outputs an L (low level) signal only in the neutral position in the case of a mechanical transmission, and in the neutral and parking positions in the case of an automatic transmission, and outputs an H signal in other cases. put out. The ignition starter switch 4 connects +B to only the ACC terminal in the ACC position, to the IG and ACC terminals in the ignition position, and to the ST and IG terminals in the starter position.
voltage is now supplied. The output Q of the timer 2 is connected to an ignition relay 6 via a buffer 5, and a contact 6a of the ignition relay 6 is connected between the input side of the ignition coil 7 and the +B terminal 8. . The IG terminal of the ignition switch 4 is connected to the input side of the ignition coil 7, and is also connected to a heating device, a cooling device, a defogger device, etc. inside the vehicle. The output side of the ignition coil 7 is connected to a distributor 8 for distributing power to the spark plaza 9, and the output of the distributor 8 is input to a rotation detection sensor 10. The rotation detection sensor 10 is a sensor that detects whether the output signal from the distributor 8 is inputted more frequently than a set value, that is, whether the engine has reached a predetermined rotation speed. a differentiation circuit 10a that differentiates the output of the user 8;
An integrating circuit 10b rectifies and integrates the output pulse of the differentiating circuit 10a, and when the output voltage of the integrating circuit 10b reaches a predetermined value (a value corresponding to a predetermined rotational speed of the engine), the output changes from H to L. It is composed of a comparator 10c that inverts the signal. The output of this rotation detection sensor 10 is for driving the monostable multi 11, for opening/closing the AND gate 12,
and for driving the solenoid 13. A starter relay 17 is connected to the output side of the AND gate 12 via a buffer 16, and a contact 17a of this starter relay 17 is connected between a starter motor 18 and a +B terminal 8. It is also connected to the ST terminal of ignition starter switch 4. 14 is an inverter. The monostable multi 11 is set when the output of the comparator 10c returns from L to H, and produces a moderate H signal at the output Q for, for example, 30 ms. 15 is the or gate. The purpose of the solenoid 13 is to project an internal pin so that the key of the ignition starter switch 4 does not rotate to the starter position when the solenoid 13 is energized. Note that this internal pin does not restrict rotation of the key from the starter position to the ignition position. The ignition starter switch 4 is linked to the steering lock mechanism, and the steering lock is released when the key is inserted and rotated to the ACC position.

Next, the operation will be explained. In the case of normal key operation of the ignition starter switch 4, this device has nothing to do with it. An engine starting time is set by a clock 1, and when the set time arrives after leaving the vehicle, an H pulse signal is output from the clock 1 and input to a timer 2. At this time, if the transmission position is neutral, the output of the neutral switch 3 is L, and the output Q of the monostable multi 11 is also L, so the timer 2 operates and sets the output Q to H. Therefore, the ignition relay 6 is energized, the contact 6a is closed, and the ignition coil 7 is supplied with power. On the other hand, at this time, the output of the comparator 10c is H, so the AND gate 12 is open, and therefore the timer 2
The H signal reaches the buffer 16 via the AND gate 12, so that the starter relay 17 is energized, its contact 17a is closed, and the starter motor 18 is
Power is supplied to the When the engine is started as described above, the period of the output voltage of the distributor 8 becomes shorter as the engine speed increases, and the voltage level of the integrating circuit 10b increases. Then, when this voltage exceeds the set value of comparator 10c,
The output of the comparator 10c is inverted from H to L, the AND gate 12 is closed, and the starter motor 1
8 stops. With the above steps, starting of the engine is completed. In addition, at this time, monostable multi 11 does not operate,
Output Q remains at L, timer 2 continues its operation, and the engine continues to rotate. Due to the above,
If heating, cooling, defroster, defroster, etc. are set in advance, power will be supplied to these devices as well. In this way, the vehicle warms up and is in a state where it can welcome the driver.

Here, if the rotation of the engine stops due to some reason (for example, engine malfunction, external mischief such as blocking the exhaust pipe), the output signal from the distributor 8 disappears, so the output of the comparator 10c changes from L to Then, the monostable multi 11 is set and the output Q is set to H for a predetermined period of time. Therefore, the timer 2 is reset and the output Q is returned to L, which causes the ignition coil to 7 to prevent the battery from rising.

Further, when the time set by timer 2 (approximately 10 minutes) has elapsed after the engine is started, the output Q returns from H to L, and the engine is stopped as described above.

Furthermore, if you insert the key into ignition starter switch 4 and turn it to the ignition position before 10 minutes have passed after starting the engine, +B voltage will be supplied to the IG terminal, so the output of timer 2 will Even if Q returns from H to L, engine operation continues.

Furthermore, if the transmission is operated to change to a position other than neutral or parking before the time set by timer 2 has elapsed, the output of neutral switch 3 changes to H, and therefore timer 2 is reset. At this time, unless the key is inserted into the ignition starter switch 4 and rotated to the ignition position, the engine will stop. In other words, the vehicle cannot drive on its own with the steering locked. Note that if the key is inserted and turned to the ignition position, the engine will not stop.

Note that while the engine is rotating after the starter motor 18 has stopped, the output of the inverter 14 becomes H and the solenoid 13 is energized, so the internal pin of the ignition starter switch 4 protrudes, thereby turning the key into the starter switch. It becomes impossible to rotate to the position, and overrun is prevented.

FIG. 2 shows another embodiment, and the same parts as in FIG. 1 are given the same reference numerals. 1' is a clock, and the set time can be set using a memory type thumbwheel switch 1a'. This is because when using a car for commuting, etc., the start time of the car is almost the same every day, so it is not necessary to set it every time. The input side of the microcomputer 19 is connected to the clock 1', a temperature sensor 20 for the air conditioner, a condensation sensor 21 for the defogger, a neutral switch 3, and the IG and ST terminals of the ignition starter switch 4, etc. Further, buffers 5, 16, 25, an air conditioner 22, a defogger timer 23, etc. are connected to the output side. Note that the output signal of the distributor 8 is transmitted to the waveform shaping circuit 24.
It is connected to the input side of the microcomputer 19 via.

In this embodiment, the microcomputer 19 is loaded with a program having the contents of the flowchart shown in FIG. The operation is as shown in FIG. 3, and the engine can be started only by operating the ignition starter switch. In other words, no starting technology is required. Additionally, for starting reliability, the engine is restarted five times at three second intervals. Further, even if the engine stops for some reason for 10 minutes after the signal from the clock 1' is input, the above-mentioned restart will be applied. In addition, large loads (air conditioner, defogger, etc.) are now turned on 10 seconds after starting, improving starting reliability. Further, when the air conditioner, defogger, etc. are not needed, the signals from the temperature sensor 20 and dew condensation sensor 21 are judged to prevent the engine from starting even at the set time, thereby reducing fuel consumption.

As explained in the above two embodiments, according to the automatic engine starting device according to the present invention, the engine starts at a predetermined time, which eliminates the drawbacks of the conventional device using radio waves. In addition to the feature that the transmission is eliminated, it also contributes to safety because it operates only when the transmission is in the neutral position.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an automatic engine starting device according to one embodiment of the present invention, FIG. 2 is a block diagram of the same device according to another embodiment, and FIG. 3 is an operation of the device according to the embodiment shown in FIG. This is a flowchart. 1, 1'...Clock, 4...Ignition starter switch.

Claims (1)

[Claims] 1 Engine start time setting means for setting the time at which the engine should be started and outputting an output signal when the time reaches the set time; and energization for energizing the ignition coil and starter motor upon receiving the output signal from the setting means. means, a rotation speed detection means for detecting the rotation speed of the engine, and a neutral detection means for detecting a neutral position or a parking position of the transmission, and when the neutral detection means is outputting a detection output, When the output signal is output from the setting means, the ignition coil and the starter motor are energized by the energizing means to start the engine, and the rotational speed detection means detects a rotational speed of the engine equal to or higher than a predetermined value. An automatic engine starting device characterized in that the starter motor is de-energized by: