Structural composition of an automobile-Manufacturers of automotive alternators and automotive starters

language

jingdn@vip.sina.com

Quote Now

language

Home

Structural composition of an automobile

Jun 19,2025

Function: Converts electrical energy from the battery into mechanical energy, generating electromagnetic torque to provide power for engine starting. Main components: Includes armature, commutator, magnetic poles, brushes, bearings, and housing, etc. The armature is the core component that generates electromagnetic torque, and the commutator is used to change the current direction, allowing the armature to continuously rotate.

An automotive starter motor mainly consists of three parts: a DC motor, a transmission mechanism, and a control device.

DC Motor
Function: Converts electrical energy from the battery into mechanical energy, generating electromagnetic torque to power the engine start.
Main components: Include the armature, commutator, magnetic poles, brushes, bearings, and housing. The armature is the core component that generates electromagnetic torque, and the commutator changes the current direction, allowing the armature to continuously rotate.
Transmission Mechanism
Function: When the engine starts, the pinion gear on the starter motor shaft meshes with the flywheel ring gear, transmitting the starter motor's torque to the engine crankshaft; after the engine starts, the starter motor pinion gear automatically disengages from the flywheel ring gear, preventing the engine from driving the starter motor at high speed and damaging it.
Types: Common transmission mechanisms include inertial engagement type, forced engagement type, and armature movement type. Among them, the forced engagement type transmission mechanism is the most widely used, with its advantages of reliable operation and rapid engagement.
Control Device
Function: Used to connect and disconnect the circuit between the motor and the battery, and can also connect and disconnect the additional resistance of the ignition coil.
Main components: Generally consists of an electromagnetic switch. The electromagnetic switch contains an attracting coil and a holding coil. When the ignition switch is turned to the start position, the attracting coil and the holding coil are energized, generating electromagnetic attraction to move the armature, thereby driving the pawl to push the starter pinion gear into the flywheel ring gear and connecting the main circuit to start the starter motor.

Common malfunctions and causes of car starters

Maintenance and upkeep of car generators

Related news

The 2021 Beijing Dongtian new production base construction project is progressing smoothly

Beijing Dongtian Auto Parts Co., Ltd. has built a new production base in Jinta Development Zone, Dingxing County, Baoding City, Hebei Province. The base covers a total area of 22 mu. The first phase (Workshops 1 and 2) will be completed and put into production by the end of June 2021. The second phase is planned to be completed by the end of December 2021. After the completion of the new base, the designed production capacity will reach 350,000 automotive starters and 250,000 generators.

In December, Beijing Dongtian invites you to the Frankfurt Auto Parts Show in Shanghai.

Beijing Dongtian Auto Parts Co., Ltd. will participate in the 2020 Frankfurt Auto Parts Show in Shanghai from December 2nd to 5th, 2020. Booth No.: 6.1 H32 (Remanufacturing Zone). We welcome colleagues from all walks of life to visit and guide us.

Maintenance points of car generator

Appearance Inspection: Regularly clean dust and dirt from the surface of the generator using a soft cloth or brush. Avoid using chemical cleaners. Inspect the generator's casing, cables, and junction boxes for damage or corrosion, ensuring their integrity.

Tel/WeChat:+44 07354725924
WhatsApp:+44 07354725924
Email:jingdn@vip.sina.com
Address: Jinta Economic Development Zone, Dingxing County, Baoding City, Hebei Province