JPH02277963A - Starter control device of engine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a starter control device for starting an engine.

(Prior art) Engines installed in conventional vehicles are equipped with a starter that is energized and rotated when the key switch is turned to the start position.As the starter rotates, the pinion jumps into the ring gear on the engine side. The engine is started via the ring gear.

Furthermore, while the engine is rotating, a safety relay is activated by a power generation signal from the alternator to prevent the starter from operating.

(Problem to be Solved by the Invention) However, while the engine is running, the starter can be prevented from operating by a signal from the alternator, but when the engine is stopped and the engine speed is lower than low idle speed, the signal from the alternator is When the power generation signal is stopped, the fuel supplied to the engine is also canted, but there are times when the engine is rotating due to the inertia of the flywheel, etc., and if you accidentally operate the starter at this time, the pinion of the 5 starter There were problems such as flying into the engine and damaging the pinion and ring gear.

The present invention was made in order to improve the above-mentioned problems, and it is an object of the present invention to provide an engine starter control device that prevents the starter from operating when the engine is inertial rotation.

(Means and Effects for Solving the Problems) In order to achieve the above object, the present invention operates a starter by a signal from a key switch to start the engine, and starts the starter by a power generation signal from an alternator driven by the engine. In a starter control device that controls the engine to stop, a timer is activated when the key switch is turned from the on position to the off position, and prohibits the starter from operating even if the key switch is turned to the start position until a certain period of time has elapsed. This engine starter control prevents the starter from operating even if the key switch is turned to the start position while the engine is rotating due to inertia after the key switch is turned to the off position to stop the engine. It provides equipment.

(Example) An example of the present invention will be described in detail with reference to the drawings. In the figure, 1 is the key switch to start the engine, and B
There are a contact, a C contact, and an ACC contact.The B contact is connected to the anode side of the battery 2, and the ACC contact is connected to the S terminal and the ACC terminal of the safety relay 3, respectively.

As shown in Fig. 2, the safety relay 3 has an RS flip-flop 4, which is reset by a signal from a reset circuit 5 that operates when a signal is input to the ACC terminal, and set by a signal input manually to the S terminal. It is now possible to do so.

The output signal of the RS flip-flop 4 and the signal input to the ACC terminal are input to an AND circuit 6, and the output of the AND circuit 6 causes a timer interposed between the stabilized power supply 7 and the relay drive circuit 8 to be input. 9 is now activated.

Relay 10 connected to the output side of the relay drive circuit 8
The contact 10a is provided between the S terminal connected to the anode side of the buffer battery 2 and the C terminal connected to the C terminal of the starter 11, and when this contact 10a is turned on, the starter 11 is started. It has become so.

Next, to explain the operation with reference to the timing chart shown in Fig. 3, if you turn the key switch 1 to turn on the key switch 1 shown in Fig. 3 (a) to start the engine, the AC
When the C contact is turned on, the RS flip-flop 4 is reset by the pulse signal output from the reset circuit 5, and the output Q becomes "LJ".

Further, since the signal input to the ACC terminal is inverted and input to the AND circuit 6 together with the output of the RS flip-flop 4, the output of the AND circuit 6 becomes rLl.

After that, when the key switch l is turned to the start position, the signal input from the contact point of the key switch l to the S terminal causes the R
The S flip float 4 is set and the output Q becomes rHJ, but since one input remains Ill, the AND circuit 6
The output remains at fLI, and the signal input to the S terminal turns on the transistors T, 1 of the relay drive circuit 8, which energizes the relay 10 and closes the contact 1.
Since 0a is turned on, C@ is turned on, energizing the starter 11, the starter 11 is rotated, and the engine is started.

When the engine start key switch l is returned to the ACC contact (on) position, the S terminal is turned off, so the transistor TP of the relay drive circuit 8 is turned off.

is turned off, relay 10 is opened, and starter 11 is stopped.

Next, when the key switch 1 is turned from the on position to the off position to stop the engine, the ACC contact becomes rLI and the signal is inverted and input to the AND circuit 6.
The output of the DIiJ path 6 becomes fHI and the timer 9 is activated.

Furthermore, even if the key switch l is set to the OFF position, the engine continues to rotate due to inertia, but the output of the timer 9 turns on the transistor Tr2 while the timer 9 is counting the preset X seconds. Even if the key switch 1 is turned to the start position again, the relay 10 is not energized.
It is not possible to start the starter 11. Therefore, even if you accidentally turn the key switch 1 to the start position and try to start the engine while the engine is inert, the starter 11 cannot be activated.
Since the starter 11 is not operated, it is possible to prevent the pinion of the starter 11 and the ring gear of the engine from being damaged.

(Effects of the Invention) As detailed above, this invention prevents the starter from operating until a certain period of time has elapsed even if the key switch is accidentally turned to the start position while the engine is inertly rotating after the engine has stopped. This makes it possible to reliably prevent the starter binion and engine ring gear from being damaged due to incorrect operation.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall circuit diagram, FIG. 2 is a circuit diagram of a control device, and FIG. 3 is a timing chart showing the operation. 1...Key switch. 11...Starter.

Claims (1)

[Claims] In a starter control device that operates a starter 11 according to a signal from a key switch 1 to start the engine, and controls the starter 11 to be stopped according to a power generation signal from an alternator 13 driven by the engine, the key switch 1 is set to the on position. This engine starter control device is provided with a timer 9 that is activated when the key switch 1 is turned to the off position and prohibits the operation of the starter 11 even if the key switch 1 is turned to the start position until a certain period of time has elapsed.