JPH0231555Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an automatic engine start/stop device that automatically stops the engine when the vehicle is stopped and automatically starts the engine when the vehicle starts. The present invention relates to an automatic start/stop control device that can improve fuel saving functions without causing any problems.

[Prior Art] An example of a conventional automatic engine start/stop device for an automobile is shown in FIG.
This key switch 2 is configured to supply a power supply voltage by connecting an ignition terminal 2b and a starter terminal 2c to a battery terminal 2a. 3 is an ignition circuit, and 4 is a normally open push button start switch, which closes only when manually pressed. Reference numeral 5 denotes a solenoid coil of a self-holding relay, and the solenoid coil 5 is configured to drive the contact 6. That is, when the solenoid coil 5 is energized, the closing between the contacts 6a and 6b is switched to the closing between the contacts 6a and 6c, and the voltage from the ignition terminal 2b is applied to the solenoid via the normally closed cancel switch 7. The voltage is applied to the coil 5, and the contact 6 is configured to be self-held by the solenoid coil 5. Reference numeral 8 denotes a starter, which starts an engine (not shown).

Reference numeral 9 denotes an ignition energization control circuit, and this ignition energization control circuit 9 connects the contacts 6a of the above-mentioned self-held contact 6,
The ignition ignition circuit 3 is configured to be energized by the closing of the ignition circuit 6c, and to control the ignition circuit 3 to be connected to and connected to the power source by the relay 10. 11 is a starter energization control circuit; this starter energization control circuit 1
1 is configured such that when the self-holding of the above-mentioned self-holding relay is in operation, power supply to the starter 8 is interrupted by a relay 12.

13 is closed in response to the lighting of the headlight, and the positive potential applied to the terminal 13a is connected to the ignition energization control circuit 9.
14 is a reverse switch that closes when the vehicle is backed up; 14a is a terminal to which a positive potential is applied; 15 is a terminal that opens when the temperature of the engine coolant reaches a high enough temperature to cause overheating, and is in a grounded state. Water temperature sensor 16 has a normally closed contact that cuts off the power, and terminal 1 is closed when turning right.
6a is a turn signal switch that supplies the positive potential applied to the ignition energization control circuit 9; 17 is a vehicle speed sensor that intermittently generates a running signal by a permanent magnet (not shown) that is fixed to the wheel and rotates when the vehicle is running; Reference numeral 18 denotes a clutch which is open when the clutch is in a fully connected state, and which is closed when the clutch pedal is depressed and the completely coupled state is broken, resulting in a grounded state and generating a depression detection signal that is the first detection signal. This clutch pedal switch 18 constitutes a first clutch switch. 20 is a slope switch that detects the slope and closes when the vehicle approaches a slope, and the switch is closed to touch the ground. 21 is a slope switch that closes when the clutch pedal is fully depressed and the clutch is completely disengaged. This clutch switch 21 constitutes a second clutch switch which is connected to the ground state and generates a disconnection detection signal which is a second detection signal.

Reference numeral 22 denotes a start detection circuit that indirectly detects the start of the engine by detecting the voltage generated by the alternator 23, and sends a signal to the starter energization control circuit 11 to cut off the starter 8 when the engine starts. It is composed of

The operation of the device configured in this way will be explained.

First, in order to activate the engine automatic start/stop device, after turning on key switch 2,
Close the push button activation switch 4. By closing the pushbutton activation switch 4, the contact 6 is activated as described above.
The contacts 6a and 6c are self-maintained closed, and power supply voltage is supplied from the on-vehicle battery 1 to the ignition energization control circuit 9, the starter energization control circuit 11, and the start detection circuit 22, respectively, to start operation.

Then, after the engine is started and the vehicle is in a running state, when the vehicle stops, the signal of the vehicle speed sensor 17 changes when the vehicle stops. At this time, if the clutch pedal is not operated, the first
The first clutch switch 19 and the second clutch switch 21 are in a non-operating state, and the relay 10 of the ignition energization control circuit 9 is closed and the ignition ignition circuit 3 continues to be energized and the engine does not stop. Thereafter, while the car is stopped, the clutch is fully engaged, the first clutch pedal switch 19 is released, and the accelerator switch 18 and slope switch 20 are released, and the lighting switch 13 and reverse switch 1 are released.
4 is open and water temperature sensor 15 is closed,
Relay 10 de-energizes ignition circuit 3, and the engine stops.

Next, the operation of automatically starting the engine will be explained. Now, when the car in which the engine is installed is stopped and the engine is stopped, the alternator 23 in the start detection circuit 22 does not generate electricity, and when the clutch pedal is not depressed, the contacts of the relay 12 are opened. and starter 8
Power is cut off.

When the clutch is depressed in this state, the first clutch switch 19 is first closed, the relay 10 is accordingly closed, and current flows through the ignition circuit 3. Next, when the clutch pedal is fully depressed and the clutch is completely disengaged, the second clutch switch 21 is closed, and the relay 12 is accordingly activated, and the opening of the contact causes the starter 8 to be activated. Since the power is supplied, the engine will automatically start. After the engine is started, the start detection circuit 22 is activated, and the starter 8 is automatically stopped by opening the contact of the relay 12.

In the device shown in FIG. 1, no wiper signal is input, but the device is normally configured to not automatically stop the engine when the wiper is operating.

However, such automatic engine start/stop devices have the disadvantage that the engine is not automatically stopped when the wiper is activated, and the effect of reducing fuel consumption is halved.

[Summary of the invention] In view of the above points, the present invention was made to solve these problems and eliminate such drawbacks. The object of the present invention is to provide an automatic start/stop control device that can be improved.

In order to achieve such an object, the present invention includes a wiper switch position detection circuit that detects the position of the wiper switch and uses a wiper switch position signal corresponding to the wiper switch position as an input signal to the control device. When the wiper switch position signal is a high output operation position signal when the wiper switch is stopped, the device does not automatically stop the engine;
When the wiper switch position signal is a low output operating position signal, the engine is automatically stopped and the wiper is automatically switched to intermittent operation.

[Embodiments of the invention] Hereinafter, embodiments of the invention will be described in detail based on the drawings.

FIG. 2 is a block diagram showing an embodiment of the automatic start/stop control device according to the present invention.

In FIG. 2, the same reference numerals as in FIG. 1 indicate corresponding parts; 24 is a control device that automatically stops the engine when the vehicle is stopped and automatically starts the engine when the vehicle is started; 25 is a wiper switch position detection circuit; The configuration is such that a signal corresponding to the switch position of the wiper switch 26 is input to the control device 24. Here, the contact positions of this wiper switch 26 are OFF position, LO (low output operation) position, HI (high output operation) position, and
It is configured for the INT (intermittent operation) position. 2
7 is an intermittent relay that operates intermittently, and this intermittent relay 27 is connected to the wiper switch 2.
When the selection contact position 6 is intermittently (INT), the power supply voltage from the battery 1 is supplied to the wiper motor 29 through the normally closed contact 28a of the relay 28 when the accessory switch 30 is closed. It is configured to be operated intermittently. Reference numeral 28b denotes a normally open contact of the relay 28, and the contact is closed by excitation of the coil 28c of the relay 28, which is energized by the transistor 31. 32 is a resistor connected between the base of the transistor 31 and the control device 24; 33 is a transistor that short-circuits the intermediate contact of the wiper switch 26 to ground; the base of this transistor 33 is connected to the resistor 34;
It is connected to the control device 24 via.

Next, the operation of the embodiment shown in FIG. 2 will be explained.

First, the car engine is started, and after driving,
When the vehicle is stopped again and the wiper switch 26 is selected and connected to the operating position INT, LO, or HI, first, if the wiper switch 26 is in the intermittent position INT, the transistor 31 is switched on. , 33 are not turned on, the automatic engine stop control is performed in the same way as explained in connection with the device shown in FIG. 1 above, and the wiper motor 2
9 continues intermittent operation.

Next, when the wiper switch 26 is connected with the LO position (low output operation) selected, the output of the control device 24 controlled by the input signal from the wiper switch position detection circuit 25 connects the transistor 31 and the transistor 33 transitions to the on state. When the transistor 33 is turned on, the intermittent wiper relay 27 operates intermittently, that is, the normally open contact 28b is closed by the operation of the relay 28, and the collector of the transistor 33 is grounded to connect the circuit. be done. Thus, the wiper motor 29 is switched from low output operation to low output intermittent operation, and the engine is automatically stopped. Further, when the wiper switch 26 is selected and connected to the HI position (high output operation), the signal from the wiper switch position detection circuit 25 is input to the control device 24, and automatic engine stop control is not performed. Therefore, the engine is not stopped and the wiper motor 29 continues to operate at high output.

As described above, in the present invention, when the vehicle is stopped, if the wiper switch position signal from the wiper switch position detection circuit 25 is a high-output operating position signal, the control device does not automatically stop the engine. If the above wiper switch position signal is a low output operation position signal, the wiper can be automatically switched to intermittent operation at the same time as the engine is automatically stopped, so it is possible to automatically switch the wiper to intermittent operation at the same time as when the wiper switch position signal is a low output operation position signal. Even if the wiper motor 29 is driven, the engine is automatically stopped and the fuel efficiency of the device is enhanced.

Although the present invention has been described above using an example in which the transistor 31, the transistor 33, and the relay 28 are provided for device switching, the present invention is not limited to this, and the present invention is not limited to this. Alternatively, it may be a switching circuit.

[Effects of the invention] As explained above, according to the invention, the wiper switch position is detected, and in the case of high-output operation, the engine is not stopped as before, but in the case of low-output operation, the wiper is operated intermittently. Since the system is configured to operate even in rainy weather such as light rain, the fuel efficiency of the device is improved without compromising the driving safety of the vehicle.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a conventional automatic start/stop device for an automobile engine, and FIG. 2 is a block diagram showing an example of an automatic start/stop control device according to the present invention. 1...Battery, 24...Control device, 25...
Wiper switch position detection circuit, 26...Wiper switch, 27...Intermittent relay, 28
... Relay, 29 ... Wiper motor, 31,3
3...Transistor.

Claims (1)

[Scope of utility model registration request] In an automatic engine start/stop device that is equipped with a control device that automatically stops the engine when the car is stopped and automatically starts the engine when the car starts, the wiper switch detects the position of the wiper switch and adjusts the wiper to the position of the wiper switch. A wiper switch position detection circuit is provided that uses a switch position signal as an input signal to the control device, and when the vehicle is stopped and the wiper switch position signal is a high-output operating position signal, the engine does not automatically stop. An automatic start/stop control device, characterized in that, when the wiper switch position signal is at a low output operating position, the engine is automatically stopped and the wiper is automatically switched to intermittent operation at the same time.