Double electronic switch starter and its control method

Abstract

The invention discloses a double-electronic-switch starter and a control method of the double-electronic-switch starter. According to the double-electronic-switch starter, voltage reduction of a storage battery can be reduced, gear jacking is avoided, the starting noise and vibration are reduced, and the service life of the starter and an engine is prolonged. The double-electronic-switch starter comprises an electric motor, a starting gear, an electromagnetic switch and a shifting fork and is specially characterized by further comprising an ECU, a sensor, an electronic switch A and an electronic switch B. A probe of the sensor is located on one side of the starting gear; and the electronic switch A is used for controlling a current flowing through the electromagnetic switch, and the electronic switch B is used for controlling an armature current. The electronic switch A and the electronic switch B are in series connection, and the electromagnetic switch is provided with a single coil; the electronic switch B is in series connection with an armature circuit of the electric motor; power source ends of the double electronic switches are in parallel connection to a positive electrode of the storage battery, and control ends of the double electronic switches are connected to the signal output end of the ECU; the output end of the sensor is connected with the input end of the ECU, and the other input end of the ECU is connected with a key door; and under the control of the ECU, the double electronic switches are matched to complete processes of popup, reliable meshing and stable starting of the starting gear of the starter.

Description

technical field [0001] The invention relates to the field of engine starters, in particular to a double electronic switch starter and a control method thereof. Background technique [0002] The starter on the engine is mainly composed of the motor and the starter gear at the output shaft end, an electromagnetic switch and a shift fork. When the key door is closed, the motor starts to work, and the electromagnetic switch is energized to drive the shift fork to mesh the starter gear with the engine ring gear. The starter gear on the starter runs at high speed to drive the engine to work. [0003] This non-buffering mode of operation of the starter has the following disadvantages: [0004] 1. The high current at the moment of starting will not only cause the battery voltage to drop too much, affect the starting performance, but also cause damage to the battery. [0005] 2. The starter gear is in a non-rotating state during the meshing process of the starter gear and the engin...

AI Technical Summary

Problems solved by technology

[0004] 1. The high current at the moment of starting will not only cause the battery voltage to drop too much, affect the starting performance, but also cause damage to the battery

[0005] 2. The starter gear is in a non-rotating state during the meshing process of the starter gear and the engine ring gear. This state may cause the teeth of the starter gear to collide with the teeth of the engine ring gear and cause the top teeth to fail to mesh successfully.

[0006] 3. There will be a peak torque when the starter rotates suddenly at the moment of starting, which will cause the starter and engine to vibrate and make noise, causing damage to the starter and engine and shortening the service life of the starter and engine

Because there are two coils inside the switch, the weight is heavy, the cost is high, the coil winding is highly complicated, and the failure rate of the electromagnetic switch is high

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