What is the cause of the shaking of electric vehicles

There are two reasons for this.

1. The potentiometer power supply system is faulty.

2. Caused by poor contact of electric vehicle power supply.

The working principle of the potentiometer: set a fixed maximum voltage, and then generate different voltage signals according to different angles, so as to adjust the duty cycle of the controller to drive the motor fast or slow!

A potentiometer is a resistive element with three pin-outs and the resistance value can be adjusted according to a certain change law. A potentiometer usually consists of a resistive body and movable brushes. When the brush moves along the resistor body, a resistance value or voltage is obtained at the output that is related to the amount of displacement.

The potentiometer can be used as both a three-terminal element and a two-terminal element. The latter can be regarded as a variable resistor, and because its role in the circuit is to obtain an output voltage that is related to the input voltage (applied voltage), it is called a potentiometer.

The main role of potentiometer in the circuit is as follows.

1.Used as a voltage divider.

A potentiometer is a continuously adjustable resistor that slides over the resistor body when the handle or slide of the potentiometer is adjusted. At this time, the output voltage of the potentiometer can be obtained at the output end of the potentiometer, which has a certain relationship with the applied voltage of the potentiometer and the angle or stroke of the movable arm.

2.Used as a rheostat.

When a potentiometer is used as a rheostat, it should be connected to two terminals, so that a smooth and continuously varying resistance value can be obtained within the stroke of the potentiometer.

3.Used as a current controller.

When a potentiometer is used as a current controller, one of the selected current outputs must be a sliding contact exit.

If it is caused by the second situation, please check whether the power connection of the electric vehicle is intact.

My tram has done this twice.

The fight is still very strong.

It's all battery wires connected to electricity.

The brushless DC motor is free of self-inductors in the case of bai

There is a startup DU process at startup, and this process will:

zha jitter. The reason is that when the DAO is sensorless, the controller cannot perceive the angle of the motor rotor and cannot make accurate commutation, so such a starting process is needed, because the commutation is not accurate, so it will shake. When the motor rotates, the motor winding will produce back electromotive force, through the phase of back electromotive force, the controller can judge the rotation angle of the rotor, and can accurately commutate, at this time the output of the motor torque enters a stable state.

So, either your motor doesn't have a Hall sensor, or your controller is in non-inductive mode and isn't using a Hall sensor.

This problem is due to a lack of phase. Two conditions can lead to phase loss:

If the Hall of the electric vehicle motor is broken, it will be out of phase, and it will be solved by replacing the motor Hall.

2.The Hall output of the controller is out of phase, and you can replace it if the controller is broken.

Analysis of the causes of car shake:

1. Cold start jitter.

First of all, starting from the cold start, the main reason for the cold start body shaking is that the fuel combustion is insufficient, resulting in insufficient power of the car. The ignition energy is low, and when starting, especially when the temperature of the fuel and lubricating oil is low, more oil is required to meet the power. Over time, the pole gap of the spark plug gradually increases, resulting in a decrease in ignition energy and poor fuel atomization, which leads to the shaking of the body.

In addition, the ignition energy can also be reduced due to the aging of the ignition coil, the aging of the high-voltage wire of the spark plug, or the leakage of electricity.

2. Suspension system problems.

Body shake is also related to the aging of the suspension system. It is mainly responsible for filtering out the shake of the engine when it is running, and if there is a problem with the suspension, these vibrations will be transmitted directly to the steering wheel and cab, affecting the driving. When the engine is idling, it is easy to cause shaking when the electrical system in the car is turned on.

The engine will increase the load when the electrical appliances are turned on, causing the idle speed to drop, and to compensate for the jitter caused by the idle slip, the engine will automatically increase the speed by partially. So, when the electrical system, especially the air conditioner, is turned on, the engine will often shake. This jitter is likely to be caused by the aging of the shock absorber and needs to be replaced in time.

3. Tire problems.

For tires, the tire must be balanced once when the car is replaced with new tires and new steel rims, otherwise the steering wheel will be prone to shake when the counterweight is uneven. If you find that the tire weight is not equal, you need to add lead to the inside of the rim to average the weight of the tires on both sides. Whether it is a general steel ring or a lightweight aluminum ring, it may deform or crack when subjected to a certain external force.

Deformation of the rim can cause shaking when driving, uneven weight of the rim can also cause shaking when driving, and incorrect angle of the rim can also cause shaking when driving.

4. Throttle problems.

The most common cause of car shake may be a dirty throttle valve and excessive carbon build-up in the fuel injector. After the car travels for a period of kilometers, the throttle valve will be too dirty to cause the throttle to close loosely or the idle motor to stagnate, resulting in the engine idling speed is too high, and the carbon deposits generated by the engine in this process will also cause the vehicle to shake, especially when starting the vehicle, the engine will shake more than normal, and even sometimes there will be a phenomenon that can not be started at one time. Therefore, when the body shakes, the first thing to do is to check the throttle and fuel injectors.

If you find that the throttle valve is too dirty or the fuel injector has too much carbon deposit, you should clean it with fuel injector cleaner or throttle cleaner in time.

5. The oil pressure is unstable.

If you still find that the body shakes after these are finished, it is recommended that you go to the repair shop to check whether the fuel supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is not normal, the intake pressure sensor is wrong and improper work will cause the body to shake.

Hello! The reasons for the shaking of the vehicle start are: 1. The engine lacks cylinders

Engine cylinder shortage mainly refers to the engine has one or more cylinders do not work normally, so that the exhaust gas flow discharged by the car has obvious intermittent, and the exhaust pipe shakes violently, sometimes accompanied by abnormal noise; 2. Aging or loosening of the foot glue: its function is to reduce the vibration and buffer of the engine when working, and to fix the engine; 3. Carbon deposition problems: including cylinder carbon deposition, throttle carbon deposition, spark plug carbon deposition, air intake carbon deposition, etc., when the carbon deposition inside the engine is too much, the ignition energy, air intake efficiency, and mixture ratio of the car will be affected, resulting in the unstable power output of the car; 4. Fuel system failure:

Answer: Hello, there are several reasons for the shaking of the car's start. 1. The clutch shakes to make the engine idle and run at low speed, hang up the low-speed gear, slowly release the clutch pedal and increase the throttle to start, if the body shakes at this time, it means that the clutch is shaken. 2. The uneven distribution of positive pressure between the main and driven discs often engages the uneven elastic force of the compression spring of the engaged-type clutch, and the adjustment of the separation lever is inconsistent and the finger end of the diaphragm spring separation is uneven, which will lead to the unsynchronized compression time, the uneven force of the pressure plate, and even the skewed pressure plate, resulting in poor contact between the main and driven discs, resulting in the shaking of the clutch.

Beimai auto parts network experts said that at this time, the clutch compression spring should be replaced and the release lever should be leveled. 3. The elastic force of the damping spring becomes weaker, and the experts of Beimai Auto Parts Network said that the elastic force of the clutch torsional damping spring becomes weaker, the elastic force of the clutch compression spring becomes weaker, and the cracks in the diaphragm spring will cause the clutch to tremble when engaged. The strategy that should be adopted at this point is to replace the springs.

4. Poor contact of clutch lining, poor contact of clutch lining, surface hardening or glue-like substance, easy to cause clutch trembling. At this time, the clutch lining should be re-connected. 5. When the driven disc is warped, skewed and deformed, the clutch lining will be in irregular contact during the clutch engagement process, and the pressure cannot be increased smoothly.

At this point, the driven disc should be calibrated or replaced. 6. The clutch trembling is caused by loose or serious loss of parts, the clutch control mechanism is locked or loosely connected, the clutch plate spline load is seriously worn, and the first shaft of the transmission is bent. At this point, the corresponding part should be replaced.

7. When the engine is loose, the engine is loose, or the first shaft of the transmission is different from the center line of the engine crankshaft, it is easy to make the clutch tremble. Beimai auto parts network experts said that the engine should be tightened or replaced at this time. 8. The driven disc loaded hoe is broken or loosened, the driven disc loaded hoe is broken or loose, the driven disc steel sheet is broken, and the dynamic balance of the rotating parts does not meet the requirements, which causes the clutch to tremble.

At this time, the parts should be replaced or re-connected with the driven disk. I recommend that you test it, I hope it can help you.

Question: I'm boasting together GAC Trumpchi dual-clutch automatic transmission car 200,000 kilometers of test kilometers Now there is shaking at the start You are always normal There is shaking from time to time.

Hello, idling body shake is a common situation encountered by many car owners. If the owner finds that the body shakes significantly while starting the vehicle or stopping the vehicle without turning off the engine, it may mean that the vehicle has one of the following three conditions:

1.The most common cause of car shake caused by serious carbon deposits in the engine is that the throttle valve is too dirty or the fuel injector is too much carbon. When there is too much carbon inside the engine, the gasoline ejected from the cold-start injector will be absorbed by the carbon deposit, resulting in a cold-start mixture that is too thin and makes it difficult to start.

In this case, only when the gasoline absorbed by carbon deposits is saturated, it is easy to get on the car, and the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the vacuum suction of the engine after the car is burned, and the mixture becomes thicker, and the combustible mixture of the engine is dilute and thick, resulting in idle shaking after cold start. The lower the temperature, the greater the amount of oil required for the cold start, and the more carbon deposits will affect the smooth cold start.

Solution: Clean the oil circuit and check whether the idle motor has carbon deposits and should be cleaned.

2.Ignition system problems Check the working condition of the spark plug, high-voltage wire and ignition coil, the ignition system is not working well, and the spark plug flashing condition is not good will also lead to this kind of failure.

Solution: Check whether the spark plug has too much carbon deposit, and replace the spark plug.

3.If the oil pressure is unstable, if you have cleaned the engine carbon deposit, washed the throttle, changed the oil pad and spark plug, etc., and still found that the body shakes when idling, it is recommended that you go to the 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is abnormal or the intake pressure sensor value is wrong and the work is not good, the body shakes will be caused.

Solution: Check the oil pressure and replace the parts if necessary.

4. Aging of engine parts.

Car jitter is also related to the aging of the engine feet (also known as claw pads). The engine foot is actually the suspension system of the engine, and the engine foot is responsible for absorbing the subtle shake of the engine when it is running, and if there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing shaking when idling.

Hope it can be adopted, thank you.

You don't need to step on the accelerator when you are cold, and you can start by idling. Because of the high rotational speed. After the car is hot, the idle speed is low and the power is small, so it will shake when starting simply by idling.

1. The main reason for the difficulty in starting is that the engine temperature is too low, so we can avoid not being able to hit the car as long as we keep the engine warm and do not let the biting cold wind blow directly into the engine compartment. Therefore, when parking in winter, pay attention to the direction of the front of the car, it is best to keep the front of the car facing the building, and use the building to block the wind and prevent the engine from being blown by the cold wind and getting too cold.

2. When parking at night, you can turn the front of the car to the direction of the sun, so that the first rays of sunlight in the morning can shine on the front of the car and help the engine heat up, so that it is much easier to get out of the car. Usually, you should also go to the designated service station regularly to check and adjust.

3. The engine is turned off when changing gears.

3. When changing gears, the engine stalls, which may be due to the idle speed being too low at that time, or the idle stop valve is not tightened, or it may be that the gear is too high and suffocated, and there is also a possibility that the oil-gas separator is seriously blocked. At ordinary times, the first gear should be basically applied at the start, and the idle stop valve should be checked to see if it is tightened and whether the plug is tightened. At the same time, it is best to go to the designated service station to clean the oil and gas separator.

1. The positioning angle of the front wheel is out of alignment, and the toe is toe.

excessively large; 2. The air pressure of the front forum is too low or the tire is unbalanced due to repair and other reasons;

3. The front spokes are deformed or the number of tire screws is different;

4. The installation of transmission system parts is loose;

5. a transmission shaft.

bending, dynamic unbalance, deformation of the front axle;

6. The shock absorber fails, the stiffness of the front leaf spring is inconsistent, and the frame is deformed.

Diagnosis and elimination of high-speed vibrations:

1. There are two situations of high-speed vibration, one is that the vibration is strong with the increase of vehicle speed, and the other is that the vibration occurs during a certain higher speed period, which causes the steering wheel.

Dithering. When judging, the drive axle is erected first, the front wheel is plugged with safety plug blocks, the engine is started and the high-speed gear is gradually shifted, so that the drive wheel reaches the final test vibration speed. If both the body and steering wheel shake at this time, it is caused by vibrations caused by the drivetrain.

Because the front axle is in a stationary state at this time, if the final test vibration speed is reached, the car does not shake, the cause of vibration is the fault of the front axle part of the car;

2. Check whether the positioning angle of the front wheel and the front wheel meet the requirements, and if it is inaccurate, it should be adjusted;

3. Set up the front axle to test the wheels, check the static balance of the wheels and whether the tires are too deformed. If necessary, a good wheel can be changed for comparative experiments.