Why does the car accelerate fast at high speed, and the higher the speed of the car, the faster the

The speed of the car at high rpm is directly related to torque.

The greater the torque of the car, the better the acceleration performance, and when driving, you will feel that the car can do whatever you want, and you can accelerate if you want to, and the "back feeling" is very good. Torque is one of the main parameters to evaluate the performance of a car, the acceleration time of the car at 0 100 km h depends on the torque of the car engine, and this acceleration time is the most important parameter to characterize the acceleration of the car.

Generally speaking, the highest index of torque can be achieved when the engine speed is relatively low, which means that the engine technology of this car is better and the power is good. Some cars only reach the maximum torque index at about 5000 rpm, which shows that "power" is not the car's forte. It can be said that the driving pleasure we pursue mainly comes from torque, which is the so-called "push-back feeling", and if the maximum torque of the engine of a certain car is in the speed range that we often use, then such a car can definitely bring you extraordinary driving pleasure.

For the average family car, the perfect maximum engine torque should occur at very low speeds, while the maximum power should appear at relatively high speeds. At present, the common turbocharged engine car, the speed of turbo intervention is usually 1500-2000 rpm, after exceeding this speed, the turbo intervenes, the car accelerates faster, and there will be a strong "push back feeling".

It's not accurate.

It's not that the speed is high and the acceleration is fast.

It is decided by torque.

If you don't understand, look for one of your cars online.

Engine condition diagram.

Look. The highest torque peak speed is the fastest when accelerating.

After the torque peak, the acceleration value will go downhill.

Yes. The speed of the engine is closely related to the speed of the vehicle, the higher the engine speed, the more pulses generated, the greater the speed value displayed on the table, and the higher the speed of the vehicle.

On the engine there is a crankshaft.

The rotational speed sensor, which rotates with the engine crankshaft, emits a pulse signal.

Some gasoline machines take an ignition pulse signal).

This signal is transmitted to the engine computer, and after calculation, a control signal is output, which is transmitted to the tachometer to control the drive stepper motor on the tachometer.

Rotation (the pointer is mounted directly on the axis of rotation of the stepper motor).

Summary. The high speed of the car and the low speed are generally due to the failure of the clutch or transmission, which may be the serious wear of the clutch plates or the damage of the clutch pressure plate spring, resulting in the inconsistency between the power emitted by the engine and the power output. It may be that the transmission is damaged, causing the transmission to not be engaged in the appropriate gear.

The solution is to go to the 4S shop to inspect and repair the clutch and transmission of the car.

Resulting in high speed of the car and low speed, it is generally the fault of the base macro clutch or transmission, which may be the serious wear of the clutch plate or the damage of the clutch pressure plate spring, resulting in the inconsistency between the power emitted by the engine and the power output. It may be that the transmission is damaged, causing the transmission to not be engaged in the appropriate gear. The solution is to go to the 4S shop to inspect the clutch and transmission of the car.

It's just that at the beginning of the start, the revs are high, and the speed is less than a few hundred meters.

Why not reply.

If there is a problem with the clutch, how can I run normally after a few hundred meters after starting?

When the car is just on fire, the engine speed is higher than the normal idle speed, which is commonly known as the high idle state of the engine. The speed can reach 1200-1500 rpm, and it will begin to gradually fall back in about half a minute, and will return to the normal idle speed of about 800 rpm. This phenomenon is normal, all vehicles will have, the purpose of the high idle speed is to allow the engine temperature to rise as soon as possible to reach the optimal operating temperature.

After each start, the rev drops to 1000 before starting.

Why is there still a high rpm and low speed within a few hundred meters of the first drive?

If there is a problem with the gearbox and clutch plates, how can you drive at a normal speed after a few hundred meters? Is it normal to run high?

When I first started, the speed of the car was very high, which was higher than normal, pro.

Here are the effects of a car revving too high:1Engine:

Long-term high rotational speed will cause a great burden on the engine due to overheating. If the output torque of the vehicle is too large at 3500-4000 rpm, driving or changing gears at this speed for a long time will cause the various parts of the vehicle to bear excessive torque (engine, gearbox, tires, etc.), and the life of the vehicle will be reduced. 2.

Fuel consumption: the lack of cherry blossoms leads to increased fuel consumption, and the speed of the vehicle is too fast, the safety will also be reduced, in the 3500-4000 gear change, the vehicle has a slight forward feeling, can appropriately reduce the shift speed, in order to achieve the best driving economy. Additional Information:

1.Calibration condition: The working condition of the engine under the calibrated power and calibrated speed is called the calibration condition.

2.Rated power: The rated power is the maximum use limit of the effective power of the early date according to the use of the engine.

The reason for the high speed of the car is that the intake system is faulty, and the throttle opening suddenly becomes larger. 2. If the cylinder pressure is not enough, check the piston ring and piston wear. 3. The problem of engine oil.

4. The clutch of the air conditioner slips or is damaged, and the engine suddenly loses load, resulting in an increase in speed. 5. Caused by the forced downshift of the transmission computer or the failure of the transmission inside. 6. The engine output power is insufficient.

Causes of high engine speed: Failure of the intake system, sudden increase in throttle opening, slippage or damage to the clutch of the air conditioner, and sudden loss of load on the engine will also cause the speed to rise.

The speed of the engine is related to the number of work times per unit time or the effective power of the engine, that is, the effective power of the engine changes with the different speeds. The working condition of the engine at the rated power and rated speed is called the calibration condition. Rotational speed size:

The engine speed can generally reach 700r min when idling, and it can be brought to 3000r min when it is running normally.

Reasons why the speed of the car becomes high:

1. The intake mold system is faulty, and the throttle opening suddenly becomes larger.

2. If the cylinder pressure is not enough, check the piston ring and piston wear.

3. The problem of engine oil.

4. The clutch of the air conditioner slips or is damaged, and the engine suddenly loses load, resulting in an increase in speed.

5. Caused by the forced downshift of the transmission computer or the failure of the transmission inside.

6. The engine output power is insufficient.

Photo by Pacific Automobile Network Q&A).

The reasons for the increase in the speed of the car are: 1. The intake system is faulty, and the opening of the dust-saving valve suddenly increases; 2. If the cylinder pressure is not enough, check the piston ring and piston wear. 3. The problem of engine oil. 4. The clutch of the air conditioner slips or is damaged, and the engine suddenly loses load, resulting in an increase in speed. 5. Caused by the forced downshift of the transmission computer or the internal failure of the transmission; 6. The engine output power is insufficient. The speed of the engine is related to the number of work times per unit time or the size of the engine's effective power, that is, the effective power of the engine changes with the different speeds.

The engine speed can generally reach 700 revolutions per minute when idling, and 3000 revolutions per minute during normal operation.

The reason for the high speed of the car is the failure of the air intake system, the sudden increase in the opening of the throttle, the lack of cylinder pressure, the inspection of piston rings and piston wear, oil problems, etc.

For manual transmission cars, it is important that the gear is matched to the rpm and travel speed, and if the correct gear is not used, it will lead to excessive engine speed. When cruising at high speeds, the top gear should be engaged, which can reduce the engine speed and improve the engine's fuel economy.

When the clutch is not fully integrated for a long time, you can smell a mushy smell in the car, if this happens, it is recommended that you check the pressure plate and diaphragm spring of the clutch, and adjust the free stroke of the clutch pedal.

Inspect the vehicle

When driving normally, do not keep your left foot on the clutch pedal when you are not using the clutch, as this will accelerate the wear of the release bearing and may also cause severe wear on the clutch plates. If there is a large amount of gas mixture entering the cylinder, the greater the force emitted by the combustion, the greater the force that naturally pushes the piston. When the speed of the piston movement increases, it means that the engine speed will be more chaotic and faster.

If the owner's oil is thicker, the engine will also have a high idle speed, and at this time, due to excessive resistance, the amount of fuel injected will also be appropriately increased. And if the fast idle speed is controlled, its idle learning value naturally needs to be increased appropriately.

Here's an analysis of the reasons for the high engine speed:1. Throttle failure shouting feast:

A throttle valve is a controllable gate valve that controls the flow of gas into a car's engine. After the gas flows into the intake pipe, it is mixed with gasoline to form a combustible mixture for combustion. There is a problem with the throttle, which causes the throttle opening to suddenly increase and the speed of the vehicle to increase suddenly.

2.Fuel pump and oil circuit system failure: the injector leaks or is blocked, and the fuel cannot be injected according to the prompts of the electronic control unit, resulting in the mixture being too thick or too thin, resulting in poor working of individual cylinders and idle jitter.

3.High rotational speeds are usually due to excessive carbon deposits. and simple infiltration to clean the throttle and idle motor in time.

4.Empty clutch failure: manual transmission, power shift, semi-automatic transmission and other types of transmissions all use friction barrier plate clutches to transmit the power of the automobile engine.

If the compression torque is insufficient or the friction plate is badly worn, it will slip and cause the car to spin at high speed.