1. Replace the engine oil, oil filter, fuel filter and air filter.
2. Check if the car's coolant level meets the requirements.
3. Check the brake and clutch fluid level.
4. Check whether the oil level in the power steering reservoir meets the requirements, and check whether there is oil leakage in each oil line interface in the system.
5. Check the fluid level in the battery and window cleaning tank.
6. Check the belts of the generator, air conditioner, water pump and booster pump for tightness and aging.
7. Check whether the car's front and rear lights are complete (including headlights, width lights, turn signals, brake lights, reversing lights and fog lights).
8. Check the car tire pressure and wear, tighten the tire screws to torquee specified, increase the tire pressure to the specified value of the model and replace the tires according to wear.
9. Check whether the vehicle's exhaust emissions meet standards.
There are many forms of automobile engines, but their operating principles are all based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is: using suitable magnetic and conductive materials to form magnetic circuits and circuits that conduct electromagnetic induction among themselves to generate electromagnetic energy and achieve the conversion goal of energy. According to the different starting and working modes of motors, they can be divided into capacitor-started single-phase asynchronous motors, capacitor-started single-phase asynchronous motors, capacitor-started single-phase asynchronous motors.e by capacitor, divided single-phase. phase asynchronous motors and three-phase motors.
According to the rotor structure, the motor can be divided into cage induction motor, which is the one you use (the old standard is called squirrel cage asynchronous motor) and squirrel cage induction motor. wound rotor induction (former standard is called wound type asynchronous motor). A squirrel cage is a closed coil.
(1) When a three-phase asynchronous motor is connected to a three-phase AC supply (each phase differs by 120 degrees in electrical angle), the three-phase stator winding passes through the three-phase circuit. phase symmetrical current and generates the three-phase magnetomotive force (rotating magnetomotive force of the stator) and generates a rotating magnetic field, which rotates clockwise along the inner circular space of the stator and rotor at a synchronous speed.
(2) The rotating magnetic field and the conductoru rotor have a relative cutting movement. According to the principle of electromagnetic induction, the rotor conductor (rotor winding is a closed path) generates induced electromotive force and induced electromotive force. induced current (the direction of the induced electromotive force is determined by the right hand) Then judge).
(3) According to the law of electromagnetic force, under the action of the induced electromotive force, an induced current will be generated in the rotor conductor which is basically consistent with the direction of the induced electromotive force . The current-carrying rotor conductor is affected by the electromagnetic force in the magnetic field generated by the stator (the direction of the force is determined by the left-hand rule. The electromagnetic force forms an electromagnetic torque on the motor rotor shaft , driving the rotor). The motor rotor rotates in the direction of the rotating magnetic field when the wordeur when there is a mechanical load on the shaft, the mechanical energy is emitted outwards. Since the magnetic flux in the part without short-circuit ring is ahead of the magnetic flux in the part with short-circuit ring, the rotating direction of the motor is the same as the direction of the rotating magnetic field.