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Engine starting device

An engine starting and starter technology, which is applied to the starting of the engine, the starting of the motor for the engine, the engine components, etc., can solve the problems of discomfort of the driver and the passengers, and the instantaneous disconnection of the air conditioner, and achieves a low-cost circuit structure, The effect of preventing instantaneous interruption and suppressing voltage drop

Inactive Publication Date: 2013-07-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, when the engine is started, there will be the following problem: that is, the voltage drop of the vehicle power supply caused by the current when the starter motor is started will cause damage to the vehicle's other electrical equipment, such as stereos, navigation systems, air conditioners, etc. momentary interruption
This momentary interruption does not become a problem when the engine is started normally, but in a vehicle equipped with an idle stop function, etc., a momentary interruption may occur when the engine is restarted after the idling stop, and may cause serious damage to the driver and passengers. come discomfort

Method used

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Examples

Experimental program
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Effect test

Embodiment approach 1

[0035] figure 1 is a circuit diagram of the engine starting device according to Embodiment 1, figure 2 It is a timing chart related to the operation of the engine starting device according to Embodiment 1, in which the horizontal axis represents time.

[0036] exist figure 1 Among them, the engine starting device 1 includes: a starter motor 2 for starting the engine (not shown); a battery 3 as a power source for supplying power to the starter motor 2; a starter switch connected to the battery 3 for starting the starter motor 2 4 and a starter switch 5; fixed contacts 5e, 5f connected to the starter motor 2 via contact terminals 5g, 5h of the starter switch 5; current suppression resistors 6 connected in series with the fixed contacts 5e, 5f; A short-circuit switch 7 provided to short-circuit the current suppressing resistor 6 when an engine start request is generated;

[0037] The starter switch 5 includes: fixed contacts 5e, 5f connected in series between the starter moto...

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Abstract

The device (1) has a short-circuit switch (7) comprising a normally closed contact that is switched to open-circuit before a contact of a starter switch (5) is switched to closed-circuit, and switched to closed-circuit after the starter switch contact is switched to closed-circuit. The short-circuit switch is closed to short-circuit a resistor (6) that is in series connection with the starter switch. The starter switch is connected in series between a power supply i.e. battery (3), and an electric starter motor (2). A timer circuit (8) controls opening and closing of the short-circuit switch.

Description

technical field [0001] The invention relates to an engine starting device which uses a starter motor to start an engine. Background technique [0002] In the case of starting the engine, the coil of the starter switch is energized to close the fixed contact of the starter switch, so that the vehicle power supply is used to supply power to the starter motor, so that the starter motor generates a rotational torque, and through the meshing The pinion and ring gear transmit the rotational force of the starter motor to the engine crankshaft to start the engine. At this time, when the starter switch is closed, the starter motor is still in a static state and does not generate back electromotive force voltage. Therefore, the extremely small internal resistance of the starter will cause an inrush current of hundreds to hundreds of amperes to flow. At this time, a voltage drop occurs in the vehicle power supply due to an internal inherent resistance in which the terminal voltage dro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02N11/08
CPCF02N11/087
Inventor 中山晴贵金田直人
Owner MITSUBISHI ELECTRIC CORP
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