Car start-up is a key component of engine start-up and its circuit design is complex and involves a wide range of electronic components such as relays, electrons, sensors, etc. Knowledge of their circuit maps and method of detection of failures are essential for vehicle repair and maintenance. This paper provides detailed information on the working principles of motorized circuits, their composition and common methods of trouble analysis and maintenance。
Automotive composition and working principles
1. Composition
Motives for motor vehicles consist mainly of the following components:
Electro-sensitization loops: multiple guidance lines around the iron core for generating electromagnetic fields. Magnetic: the end of a fixed online circle, linked to the driven (e. G., pistons or curves). Spring: used to keep magnets in contact with the drive. Touches: connect to control circuits, which are used to break the current of the wire. Relays: control the break-up of the contact point, and thus the energization of the electrons. Sensor: is used to detect the operational state of the motive, e. G. The motor rotation, contact state, etc。
2. Rationale
When power is connected to the motor circuit, the control circuit closes the contact point of the relay and connects to both ends of the electric sensor circle. When wire loops go through, they create a powerful electromagnetic field that attracts magnets at the end of the spring, thus enabling the movement of the driven (e. G., pistons or curves). When the driver moves to the limit position, the spring bounces back, disconnects the connection to the esp, at which point the contact is disconnected and the esp stops energization. The relays then reopen the contact points and complete a start-up cycle. Analysis of motorized circuit maps
1. Basic composition of circuit maps
Power component: usually provided by vehicle-borne power, divided into positive and negative poles. Control of circuits: this includes relays and control circuits at contact points, which are used to break wires. Electromagnetic loop circuits: composed of electrons and sensors used to detect motor motion。
2. Interpretation of circuit maps
Endmarking: the circuit map is usually marked with a lead end for connecting to actual equipment (e. G. Generators, control modules, etc.). Relay's contact status: by observing the break-up of the contact, it is possible to determine whether the electrons are subject to energization. Signal output of the sensor: the sensor sends a signal to the control system by detecting the motor's state of motion (e. G. Rate of rotation, location, etc.). Car motor circuit failure analysis
1. Common failures
Motivation not working: usually caused by damage to relay contacts or short circuits. Motivated overheating: caused by excess or dispersible heat, which may be associated with sensor abnormality or failure of relay overload protection. Motivation vibrating or acoustic: may be caused by electro-sensor loop dirt or sensor failure。
2. Fault detection methods
Observation method: preliminary determination of cause of failure by examining end state, contact contact contact and sensor signal strength. Measurement: the electro-resistance, sensory values of the electro-sensor circle are used to measure the electrocution properties of the contacts. Fault removal process:
1. Check whether the power supply is normal。
2. Check for electrical power at contact points。
3. Measuring the electrical resistance of the electrons and determining whether they are short-circuited。
4. Check the signal strength of the sensor and determine whether the sensor is working properly。
Maintenance and maintenance of motorized circuits
1. Common maintenance scenarios
Contact failure: the point of contact is reduced by wear and tear or by the accumulation of dirt, which requires replacement or cleaning. Electromical coil failure: a short or broken coil is required to disassembly the coil and to check whether the coil or magnetic core is damaged and replace it. Sensor failure: sensor output is abnormal and needs to be replaced。
2. Maintenance steps
Disconnected power source: ensure that circuits are in a state of blackout and avoid exposure to electrical shocks. Disassembly the endpoint: dismantling the endpoint in order to ensure the correct connection, according to the circuit chart number. Check and replace: check the state of contact points, electrons and sensors based on the results, and replace them as necessary. Reassembly: reconnect the components to the circuit map to ensure the correct connection。
The motorized circuit map is an important reference for vehicle maintenance and maintenance, and the correct interpretation of the circuit chart and the mastery of fault analysis and maintenance methods effectively guarantee the proper operation of the engine and enhance the overall performance of the vehicle. Learning car motorized circuit maps and mastering of trouble detection and maintenance skills is a necessary learning element for repairers who have just come into contact with car motivations。
