How to troubleshoot and diagnose the deterioration of car acceleration

If the speed deviation is too large, the speed deviation is too large, and the cause should be analyzed, and the second should be taken to correct the deviation and return to normal.

Check the servo motor.

Whether the inverter operation mode is selected correctly, for example, whether it works in JOG mode, multi-stage variable speed mode check whether the servo motor DI input signal is correct, for example, whether the turn signal, stop signal is defined as JOG mode, input signal of multi-stage variable speed mode, etc.

This is a fault for excessive speed deviation. Cause of failure: Encoder parameter setting, incorrect motor plugging inverter wiring, phase sequence error, solution:

Check encoder parameters; Check whether the motor parameters are correct, such as Zheng; whether the settings are reasonable; Check the cable connection is the speed of the command given by the main control board, and the rotary encoder.

The actual velocity obtained, the difference is outside the detected value. It is normal for Laitoutiao to have a certain error, and the general inverter error is allowed to be 10% by default.

Poor contact or signal interruption; poor engine maintenance;

1. Sensor problems; The sensors mentioned here include water temperature, crankshaft position, air flow, intake air temperature, oxygen sensor, etc., when these sensors are damaged, poor contact or signal interruption, the ECU of the car can not accurately obtain the engine data, at this time it will cause the engine fault light to turn on. 2. Maintenance problems; Poor engine maintenance is the most common cause of engine failure to light up. We know that the vehicle has a certain maintenance cycle, if the owner does not maintain on time, coupled with bad driving habits, then it will increase the burden of engine operation, and finally can only remind you through the fault light to care about your car 3, oil quality problems; The oil quality here includes fuel and engine oil, we know that the fuel filled by the car is generally marked, and the engine oil is also semi-synthetic and fully synthetic, the manufacturer will generally recommend the owner to use which grade of fuel, which type of engine oil, if the owner does not add as required, it will cause wear and tear of the engine in the long run, and the fault light is not to blame.

Poor combustion of the mixture; The failure of the spark plug, ignition coil, fuel pump, and oil circuit blockage of the engine will cause poor combustion of the engine mixture. Mixed gas combustion and poor signaling are caused by engine carbon deposition or knocking problems, which will eventually be monitored by the engine's oxygen sensor and reported to the ECU, which will naturally light up the fault light to warn of the intake air intake problem; When the engine burns, it needs to take intake, the air filter element is very important in this process, if the air filter element of the car is not clean, it will affect the air intake of the car if it is not cleaned regularly, and it will be blocked for a long time, and if it is serious, it will cause the engine failure light to turn on. pressurization issues; Intake booster lines and turbochargers can also cause engine failure lights to illuminate.

The most common of these is turbocharger damage, and the vehicle can also slip and cause symptoms such as oil leakage, high oil consumption, power drop, metal noise, and blue or black smoke from the exhaust pipe. 7. Exhaust problems; Rear oxygen sensor, three-way catalytic converter, exhaust camshaft and bearing. The most common of these is a failure of the three-way catalytic converter that causes the engine failure light to illuminate.

The use of leaded gasoline, the use of leaded or silicone lubricant additives, the bump of the three-way catalytic converter, and the failure of the engine oil supply system are some of the factors that can easily cause the failure of the three-way catalytic converter.

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The method of diagnosing the fault of automobile acceleration error is to use the fault diagnosticator to read the fault code and related data stream, and find out the cause of the fault according to the fault code prompt and dynamic data. Focus on air flow meters, intake pressure sensors, and throttle position sensors. Check whether the air intake system is leaking, and focus on checking whether the vacuum pipe and the air intake hose clamp are damaged.

The vacuum gauge can be used to detect the vacuum level of the intake manifold, especially when the throttle opening is increased. The above is the method of diagnosing the fault of poor acceleration of the car.

Fault diagnosis of poor acceleration of automobiles.

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The method of fault diagnosis of poor acceleration of automobile is to use the fault diagnosis instrument to read the fault code and related data stream, and find out the cause of the fault according to the fault code prompt and dynamic data. Focus on air flow gables, intake pressure sensors, and throttle position sensors. Check whether the air intake system is leaking heavy liquid, only change the point, and check whether the vacuum pipe and the air intake hose clamp are damaged.

The vacuum gauge can be used to detect the vacuum level of the intake manifold, especially when the throttle opening is increased. The above is the method of diagnosing the fault of poor acceleration of the car.

Fault diagnosis of poor acceleration of automobiles.

Start with the system.

Kiss, okay.

As soon as possible. Dear, starting from the system, check the air intake system is to eliminate air leakage, and focus on checking whether the vacuum pipe and the intake hose clamp are damaged. The vacuum gauge can be used to detect the vacuum level of the intake manifold, especially when the opening of the throttle valve is missing.

If there is charcoal and dirt in the body of the solar term, it should be cleaned. Note: After cleaning and reinstalling the throttle body, the diagnostic instrument must be used for matching settings.

Kiss, okay.

All five major systems need to be analyzed.

Kiss, okay.

Kiss, engine only nuclear system: check whether the engine is working properly, including ignition system, air intake system, fuel system, exhaust system. Drivetrain:

Check that the transmission and clutch are working properly, and also check that the propeller shaft and differential are not damaged. Fuel ** System: Check that the fuel pump and injector are working properly, and that the high-pressure oil line is not damaged and clogged.

Discharge system: check whether the exhaust pipe is damaged and blocked, and whether the emission control equipment is working properly. Vehicle electronic control system:

Check that the vehicle's electronic control unit ECU is working properly, and the fault diagnostics can help diagnose if there is a fault in the electronic control system**.

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Expansion: The automobile engine is the device that provides power for the car, and the absolute burial is the heart of the car, which determines the power, economy, stability and environmental protection of the car. Depending on the power**, the dust of a car engine can be divided into diesel engines, gasoline engines, electric motors, and hybrids.

1. The reason why the car has a sense of powerlessness is mainly because the engine does not have enough oil when the rubber trail is uphill, the combustion efficiency decreases, and the horsepower does not meet our requirements.

2. In addition to oil, the engine also needs air, if the air filter, throttle and other components are blocked or there are problems, resulting in insufficient air intake, it will also cause the car to accelerate weakly and slowly.

When the fault diagnosis is missing, it should be combined with the specific symptoms of the engine to make a preliminary judgment. When the accelerator pedal is pressed, the engine speed fluctuates slightly and then rises immediately, and can be maintained at high speeds for a long time. In this case, there is usually a fire failure at the moment of acceleration, and the fault is in the ignition system, which should be checked first.

When the accelerator of the car is weak, you should check the spark plug of the car fuel tank and engine. Do some simple faults, troubleshoot them and then go to the repair.

In the current family life material is constantly rising, many families have their own private cars, so in daily life, there will be some small faults in the vehicle from time to time. So how should families troubleshoot and troubleshoot poor acceleration? In fact, the method is very simple, and I will summarize it for you today.

1. Check the mechanical part It is very important to check the mechanical part of the vehicle, because if there is a problem with the parts of some mechanical parts, the vehicle will have a failure of poor acceleration. So we have to check whether some engines can run normally, whether there is a reason why the engine cannot be accelerated because of the engine stalling. Therefore, we should pay attention to the inspection of the mechanical part of the vehicle, so that we can judge whether it is due to engine problems that cause poor acceleration of the car.

Therefore, when checking the quality problems at home, we must pay attention to the part of mechanical inspection. <>

2. Check the ignition deviceSometimes there is a problem with the large device of the vehicle that causes the ignition to be unable to run normally, that is, the engine cannot run normally, so the integrity of the ignition device is very important for troubleshooting the fault of poor acceleration. Therefore, when checking the vehicle problem, we must pay attention to check whether the ignition device is in good condition, because if there is a problem with the ignition device, the operation of the engine will definitely have problems, which will also lead to poor acceleration failure of the vehicle. Therefore, when eliminating the fault of poor acceleration, we must check whether the ignition device is in good condition, and if the ignition device is not intact, the engine must not operate normally.

3. Check the remaining amount of gasoline For cars, the sufficiency of gasoline is to provide sufficient kinetic energy for the car, if the gasoline is not enough. It will definitely lead to poor acceleration of the car, so be sure to check the fertility of gasoline before starting a new car, and when you see that the intake of gasoline is not enough, you must fill up the gasoline if you are driving long distances. In this way, there will be no failures that cannot be operated on the road.

The above are some suggestions on how to troubleshoot beam excavation and closing faults such as poor acceleration.

First of all, you should check the ignition system, and at the same time, you should also observe whether there is any adverse reaction when accelerating, if the sound of the engine running is particularly slow when you step on the accelerator, it means that there is no bad acceleration. The mechanical part should be checked first, or it should be determined by checking the oil and gas ratio, and the oil pressure gauge should also be observed.

You can go directly to a professional repair shop for an overall inspection and elimination, because sometimes it is easy to overlook some small details and make mistakes in judgment.

You can first check whether there is a problem with the engine, or whether there is any other problem with the brake, or maybe some parts of the throttle are faulty.

To inspect and eliminate the fault of the poor bending speed of the combustion delay, it is necessary to consider the ignition system, oil and gas ratio and computer, as well as the mechanical aspect to check whether there is a problem of Pitong.

When the acceleration of the car is weak, it should be accompanied by the occurrence of trembling when the engine accelerates, and there may also be guns, black smoke, etc. The reasons for it are manifold. It is mainly reflected in the three major aspects of oil, electricity and machinery.

First, the oil circuit failure.

Many people think that throttle carbon deposits will affect the acceleration performance of the engine. However, I think that throttle carbon deposition only affects idle instability, and has little impact on engine acceleration performance.

The air filter element is blocked or water ingress will make the air volume small, resulting in too thick the mixture, incomplete combustion of the engine, and poor acceleration, at this time, the exhaust pipe will be seriously smoky.

Cracks in the oil pipe or loose air leakage in the joint, and insufficient pressure of the oil pump, resulting in poor oil supply and weak acceleration.

The injector is poorly atomized or clogged, resulting in the cylinder not working well or not working. Affects acceleration performance. Black smoke may come out of the exhaust pipe.

The issue of oil products is also an aspect. If the water content of the oil is too large, the exhaust pipe will emit white smoke.

Second, circuit failure.

There is a problem with the air flow meter, which causes a decrease in the air intake, resulting in an over-concentrated or over-thin mixture, which affects the acceleration performance.

The spark plugs of individual cylinders are damaged, that is, the cylinders are missing, which affects the acceleration performance. Also, leakage of cylinder line, etc.

High water temperatures or bad temperature sensors can also affect acceleration.

A clogged three-way catalytic converter or a faulty oxygen sensor can also cause poor engine acceleration (many people think that the oxygen sensor does not affect the engine, only the emissions).

Third, mechanical failure.

Engine valves, cylinder liners, pistons, and rings are worn out, resulting in cylinder pressure not meeting the requirements.

The intake valve clearance is too large, and the exhaust valve clearance is too small. Or the intake and exhaust valves are out. This will lead to a lack of cylinders. Affects acceleration performance.

The timing belt (chain) wears out, resulting in a sooner or later ignition time pattern that also affects the acceleration performance.

A collapsed engine gasket can also cause this problem.

Excessive carbon build-up in the cylinder. It's also a reason.

In fact, there are many reasons why the engine has poor acceleration. It should be judged according to the various conditions of the vehicle. For example, the number of kilometers driven, the age of the vehicle, the fault point and so on. This requires some maintenance experience.

Many people say that it can be plugged into a computer for testing. But beware, like many mechanical failures, computers can't detect them. For example, the size of the valve clearance cannot be detected by the computer. Of course, the fault of the circuit is very easy for the computer to detect.

Through the above analysis, it can be seen that there are many reasons for poor engine acceleration. There is still a certain amount of experience in judging this aspect. Otherwise, it will be like a dog biting a hedgehog with nowhere to start.

The so-called poor acceleration (commonly known as:"Speed up and get in the car"), refers to when the accelerator is pressed 3 5 or more rapidly, the engine speed can not rise rapidly, but as long as the accelerator is pressed, the engine speed will still increase slowly, and the engine has no other faults (such as unstable idling).

The reasons for poor acceleration are as follows:

1. If you press the carburetor carburet, the main reason is that the carburetor accelerates the oil circuit.

2. There are many reasons for insufficient power, such as: lack of fire in the cylinder, improper air-fuel ratio, poor ignition timing, insufficient cylinder pressure, blockage of the three-way catalytic converter, poor signal of some sensors, air intake system leakage, air filter blockage, brake bite, automatic transmission failure, tire pressure, wheel alignment, etc.

Therefore, in the actual diagnosis of such faults, the first thing to do is to confirm whether it is poor acceleration or insufficient power. Although some of the phenomena and causes of these two types of faults are the same, but in essence, these are two different types of faults, if the rapid acceleration is not repaired according to the lack of power, it will be twice the result with half the effort, and it may take many detours before finally finding the cause of the failure.