What is the function of the automotive starting system?
1 Answers
The function of the automotive starting system is to convert the electrical energy from the battery into mechanical energy through the starter motor, thereby initiating the engine operation. The starting switch activates the electromagnetic switch circuit of the starter motor, enabling the electromagnetic switch to operate. In gasoline engines, the starting switch is integrated with the ignition switch. The starting relay controls the on/off state of the starter motor's electromagnetic switch circuit via its contacts (normally open type), while the starting switch only controls the coil circuit of the starting relay, thereby protecting the starting switch. The starting system consists of the battery, ignition switch, starting relay, and starter motor. The starter motor, commonly referred to as the "motor," is composed of three main components: a DC motor, a transmission mechanism, and a control mechanism. The DC motor's role is to convert electrical energy into mechanical energy, generating electromagnetic torque. The transmission mechanism's function is to engage the drive gear with the engine flywheel ring gear, transmit the DC motor's electromagnetic torque to the crankshaft, and promptly disconnect the power transmission between the crankshaft and the DC motor to prevent the crankshaft from being driven backward. The control mechanism's purpose is to connect or disconnect the main circuit between the starter motor and the battery, as well as to engage or disengage the drive pinion. Some pneumatic control mechanisms also feature an auxiliary switch that can short-circuit the ignition switch during startup to increase ignition energy.
