JPH0578971U - Vehicle engine starter - Google Patents

Abstract

(57) [Abstract] [Purpose] To optimize the stop timing of the starter motor after starting the engine by an external signal and to improve the workability of mounting on the vehicle. [Construction] The receiver 1 generates a reception signal Sa when it receives a radio signal instructing to start an engine from a portable transmitter. The start control circuit 2 operates the IG relays 10 and 11 and the starter relay 12 on condition that the output voltage of the vehicle-mounted battery is sufficient and the shift position is in the parking position when receiving the reception signal Sa. To start the starter motor 4, and thereafter, when the engine speed indicated by the rotation speed signal Sp from the electronically controlled fuel injection device 5 reaches the set rotation speed, the starter relay 12 is stopped and the starter motor 4 is stopped. To stop.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle engine starting device for starting a vehicle engine by an external signal sent by remote control of a transmitter or an external signal from a timer.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, there has been provided an engine starting device for starting an engine of a car stopped in a remote place by a radio signal from a terminal device carried by a driver to start warm-up operation. In realizing such a device, it is necessary to prevent the overrun by stopping the starter motor for starting the engine at an appropriate timing after starting the engine. It is desirable to determine such off-timing based on the engine speed, but a signal indicating a general engine speed (such as a tachometer signal) has a number of revolutions due to noise on the ignition system. Since the signal quality is extremely poor, it is not suitable for determining the start timing of the starter motor.

Therefore, conventionally, the timing when the charge warning lamp is extinguished when the alternator starts power generation, or the timing when the power supply voltage (voltage of the on-vehicle battery) rises above a certain level due to power generation start when the engine is started. It was used as a substitute for the completion timing of engine start, and the starter motor was stopped at such timing.

[0004]

[Problems to be solved by the device]

 However, the timing when the charge warning lamp is turned off is behind the actual start completion timing of the engine, and the power supply voltage changes depending on the ambient temperature such as different in summer and winter. Since it is located below, the conventional engine starting device has a problem that it is substantially impossible to stop the starter motor at the optimum timing. Also, the timing for turning off the charge warning lamp and the timing for the power supply voltage to rise above a certain level with the start of power generation differ depending on the vehicle model or vehicle.Therefore, adjust the start timing of the starter motor when the vehicle is installed. However, there is a problem in that the workability of mounting on a car is poor.

The present invention has been made in view of the above circumstances, and its purpose is to optimize the stop timing of the starter motor after the engine is started, and to improve the workability of mounting on the vehicle. An object is to provide a vehicle engine starting device that achieves the following.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is directed to a vehicle engine starting device for starting an engine for a vehicle that performs ignition timing control and the like by an electronic control unit by an external signal. A control means is provided for starting the operation of the starter motor for starting the engine in response to the input of an external signal and for stopping the starter motor when the engine speed signal output from the electronic control unit exceeds a set level. It is configured.

[0007]

[Action]

 The control means starts the operation of the starter motor for starting the engine in response to the input of an external signal, and the engine speed signal output from the electronically controlled fuel injection device in response to the start of the engine in response to the start When the above is reached, the starter motor will be stopped. In this case, since the engine speed signal from the electronically controlled fuel injection device has a characteristic that noise is small, it becomes possible to accurately judge the starting state of the engine based on the engine speed signal. It is possible to optimize the stop timing.

[0008]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an electric configuration of an engine starting device for starting an automobile engine when receiving an electric wave signal as an external signal transmitted from a portable transmitter. Only the parts to be shown are schematically shown.

That is, in FIG. 1, the receiver 1 having the antenna 1 a generates a reception signal Sa and controls it when receiving a radio signal for instructing the engine to start from a portable transmitter (not shown). It is configured to be applied to the starting control circuit 2 as a means.

The battery voltage monitoring circuit 3 monitors the output voltage of the in-vehicle battery, and when the monitored voltage becomes lower than a predetermined lower limit voltage (voltage at which the starter motor 4 of the automobile engine can operate normally), the voltage is lowered. The shortage signal Sf is generated and given to the start control circuit 2.

The electronically controlled fuel injection device 5 as an electronic control unit has a well-known structure for controlling ignition timing, idling speed, etc. of a gasoline engine, and has a pulsed engine speed signal indicating the engine speed. Sp is supplied to the start control circuit 2.

In addition to the above, the start control circuit 2 is also configured to receive signals from the parking brake switch 6, shift position switch 7, bonnet switch 8 and door lock detection switch 9.

In this case, the parking brake switch 6 generates the brake operation signal S1 in a state where the parking brake of the automobile is in the operating position, and the shift position switch 7 indicates that the shift position of the automobile is in the parking position (however, the automatic trans In the case of a transmission, the parking signal S2 is generated in the neutral position (in the case of a manual transmission), and the bonnet switch 8 generates the bonnet closing signal S3 in the state where the hood of the vehicle is closed to detect the door lock. The switch 9 generates a door lock signal S4 when the door lock mechanism of the automobile is all locked.

On the other hand, the IG relays 10 and 11 each form an energization path for other loads such as an ignition circuit of an automobile and an air conditioner in an operating state, and the starter relay 12 energizes an energization path of the starter motor 4 in an operating state. The relays 10 1, 11 and 12 are configured to be operated by the start control circuit 2 via the drivers 10 a, 11 a and 12 a.

Now, in the following, the control content of the starting control circuit 2 will be described with reference to FIG. Note that FIG. 2 shows respective operation timings of the IG relays 10 and 11, the starter relay 12, and a change state of the engine speed N 2 indicated by the engine speed signal Sp.

That is, the starting control circuit 2 determines that the voltage shortage signal Sf is not input when the reception signal Sa is given from the receiver 1 (timing t1 shown in FIG. 2), and the engine speed signal is received. The IG relays 10 and 11 are set on condition that the rotation speed indicated by Sp is less than the idling rotation speed and that the brake operation signal S1, the parking signal S2, the bonnet closing signal S3, and the door lock signal S4 are all input. It is operated (ON), and thereby the ignition circuit is switched to the active state. Further, after that, at a timing t2 when a certain waiting time T has elapsed, the starter relay 12 is operated, thereby starting the starter motor 4 and starting the engine.

That is, when a radio signal for instructing to start the engine is transmitted from a portable transceiver (not shown), the output voltage of the vehicle-mounted battery is in a state sufficient to start the engine, and the engine has already been started. Not present, the parking brake is working, the car's shift position is in the parking position, the vehicle's hood is closed, and the vehicle's door locks are all locked. , The engine will start.

Further, the starting control circuit 2 monitors the engine speed N based on the engine speed signal Sp after the starter relay 12 is operated, and the engine speed N is set to the set speed ΔN (in the present invention, At a timing t3 when it reaches a so-called set level), the starter motor 12 is stopped by stopping the operation of the starter relay 12. In this case, as shown in FIG. 3, the set rotational speed ΔN is lower than the idling rotational speed of the engine and is higher than the lower limit of the rotational speed at which the engine can rotate by its own power by a marginal rotational speed α. It is set.

The starting control circuit 2 stops the starter relay 12 when the starter relay 12 has been operated for more than a predetermined time limit Tmax (see FIG. 2). Has become.

According to the above-described embodiment, when the engine is automatically started and stopped by the radio signal transmitted from the portable transmitter, the engine stop timing is determined (that is, the engine is started). Is performed based on the engine speed signal Sp from the electronically controlled fuel injection device 5, which has a characteristic of low noise, so that the timing for stopping the starter motor 4 can be optimally set. Like Moreover, in this case, it is not necessary to adjust the stop timing of the starter motor 4 in a state where the starter motor 4 is attached to an automobile, which improves the workability of attachment.

In the above embodiment, the external signal (radio signal) is obtained from the portable transmitter. However, for example, a timer for outputting a time-up signal when the set time is reached is provided, and the time-up is performed. It is also possible to use a signal as an external signal.

[0022]

As is apparent from the above description, according to the present invention, the starter motor for starting the engine is started in response to the input of the external signal, and the engine speed signal output from the electronic control unit is output. Since the control means for stopping the starter motor when the engine is above the set level is provided, the start timing of the starter motor can be optimized after the engine is started, and the overrun of the starter motor can be ensured. In addition to being able to prevent it, it is possible to achieve a practical effect that the workability of mounting on a vehicle can be improved.

[Brief description of drawings]

FIG. 1 is an overall schematic circuit diagram showing an embodiment of the present invention.

FIG. 2 is a timing chart for explaining the operation

FIG. 3 is a diagram showing a relationship between an engine speed and a set speed.

[Explanation of symbols]

In the figure, 1 is a receiver, 2 is a start control circuit (control means),
3 is a battery voltage monitoring circuit, 4 is a starter motor, and 5 is an electronically controlled fuel injection device (electronically controlled unit).

Claims (1)

[Scope of utility model registration request] 1. A vehicle engine starting device for starting an engine for a vehicle, which controls an ignition timing by an electronic control unit by an external signal, and starts a starter motor for starting the engine in response to an input of the external signal. In addition, the vehicle engine starting device is provided with a control means for stopping the starter motor when the engine speed signal output from the electronic control unit exceeds a set level.