What is the effect of the car engine speed being constantly at high speed?

As long as it is within the tolerance range of the car engine, that is to say, at about 3000 rpm, running at high speed, I think it is very normal, because now the engine quality of the car is getting better and better, it is the core component of the car, if the quality is not good, it is difficult to use it for 10 years and 8 years, the normal speed within the engine tolerance range, will not have any impact on the car, at most it is to say that the speed of running is fast, it will put forward a test for the safety of the whole vehicle and other parts. <>

It will wear parts, especially increase the friction of the gears, and damage the gearbox, usually everyone will feel such a problem when driving at high speed, but if it is a new car, the probability of this problem is not large, but if your vehicle has been for a long time, then you must regularly go to the repair shop for maintenance, and check the degree of tire wear when you are usually on the road.

Often in a high-speed state, you may often run high-speed kilometers, high-speed highway speed for a long time in 100km h-120km h, even if the highest gear is hung at this time, the speed of the engine can also ensure that it is in a relatively good combustion state, but also can play a certain role in cleaning the engine valve, some carbon deposits and gum inside the combustion chamber, and promote the smoother work of the moving parts. Long-distance high-speed cars have sufficient engine speed to ensure that the generator has sufficient power generation, and the battery is not easy to lose power, and the life of the battery will be extended.

Car engines often run at high speeds, which can put a lot of unnecessary load on the engine. This can greatly affect the life of the engine. Moreover, the high-speed operation of the engine will put the engine in a very high temperature environment, which can easily lead to the engine for a long time, affecting life safety!

The engine is the core component of the car, and if it is always loaded, there will be damage, especially the engine, which is easy to rise in temperature. Long-term operation can lead to engine failure or even high air pressure. It will affect the normal life of the car.

It will bring high load to the engine, it hurts the engine for a long time, and the biggest and most direct impact is the fuel consumption, I have a friend who likes to drive fast, and only change gears after 2500 rpm, the same car has a lot higher fuel consumption than others, and the new car has been overhauled for two years.

If the speed of the engine is maintained at 3000 rpm, above the speed, such an engine will lead to serious wear of the steel wall inside the engine, damage to the piston connecting rod, scrapping of the engine, and ultra-high water temperature, it is not recommended for novices to drive like this, and the general driver knows that the vehicle is maintained at 2000 to 3000 rpm, which is a very reasonable range, <>

The engine is often in a high-speed state, and the impact is quite large, and you also need to pay more attention to it in ordinary driving.

1. The engine is often in a high-speed state, which can easily lead to engine bursting, and the maintenance cost is quite high, and the maintenance is also very difficult.

2. It can reduce the life of the engine, and there will be high fuel consumption and weak power in the later stage.

Therefore, you must not drive violently when you usually drive, and the loss will be very large.

<> is actually nothing at high rpm all the time, for example, when you run at high speed, you generally have to reach 2000 rpm, and sometimes even 3000. This is the time when the engine is running very well. For the external structure of the engine is completely bearable.

So it doesn't hurt much at all.

The wear and tear on the gearbox is enormous. If it is kept in this working condition from time to time, it will accelerate the wear of the transmission clutch, and the gearbox oil will soon turn black and then slowly become worse and worse heat dissipation.

The reason why the car idles very high when starting and only drops to normal after a while:

1) It is normal for the idle speed to be high when starting. Cars need high speeds to get the engine to reach normal working conditions as soon as possible, and they need a thicker mixture, so the air intake and fuel injection will increase, resulting in high speeds.

In order to save fuel and reduce wear and tear when starting, there is generally a cold car fast idle or water temperature sensor, (water temperature sensor, as the name suggests, is an electronic component that detects water temperature, provides signals to the ECU, and ensures that the engine controls the amount of fuel injected when starting or running.) Further, the ECU changes the amount of fuel injected each time according to the signal provided by the water temperature sensor to meet the different needs of the engine for fuel supply under various operating conditions).

The colder the weather, the lower the water temperature (higher than the normal working temperature of the engine, generally about 85-110 degrees), that is, the greater the temperature difference with the normal engine operation, the computer will control the cold car to idle, that is, the higher the engine speed when it is just started. Under normal circumstances, according to the different water temperatures, the idle speed of the engine will slowly decrease from more than 2000 until the engine reaches the normal working temperature and reaches the standard idle speed of about 800 rpm.

2) High rotational speed is generally the cause of excessive carbon deposit. Timely cleaning of the throttle and idle motor can usually solve the problem.

Reasons for high car idling:

1. The idle switch is not closed;

2. The idle control valve is faulty;

3. Air intake pipe leakage;

4. The gas distribution phase is wrong;

5. The injector is dripping or clogged;

6. The exhaust system is blocked;

7. The EGR valve is opened when idling.

A malfunction in the intake system, a sudden increase in the opening of the throttle, a slippage or damage to the air conditioning clutch, and a sudden loss of load on the engine can also cause an increase in rpm.

Under normal circumstances, in order to reach the normal working temperature as soon as possible, the speed of the engine will increase after the cold car starts, when the normal temperature is reached, the engine speed will drop, if the engine speed does not drop, it may be the idle control valve stuck, the engine water temperature sensor failure, the engine computer failure, the idle speed adjustment is improper, the throttle failure, the air intake pipe leakage is caused, if you are worried about the impact of use, it is recommended that you contact the after-sales service as soon as possible, if the problem is not solved, It is recommended to feedback your questions through the car quality network, and the car quality network will feedback the problem to the manufacturer for processing, I hope my answer can help you.

Long-term overheating can put a lot of strain on the engine due to overheating, and of course, the torque output varies from model to model in each rev range.

Theoretically speaking, the engine can be fully burned at high speed to reduce the generation of carbon deposits, but if the output torque of the vehicle at 3500-4000 rpm is too large, driving or changing gears at this speed for a long time will cause the vehicle parts to bear excessive torque (engine, gearbox, tires, etc.), resulting in reduced life.

At the same time, it will also lead to an increase in fuel consumption, and the speed is too fast, the safety will also be reduced, when the 3500-4000 shift gear, whether the vehicle has a slight feeling of moving forward, if there is, it means that the vehicle has output excess torque in the speed range, and the shift speed can be appropriately reduced to achieve the best driving economy.

It is better to switch into the right gear at the right time.

In addition, the new car will cause more damage, and if the car in the run-in period is too high for a long time, the engine life will be greatly reduced.

The reasons for the high speed of the automobile engine are: 1. The throttle opening suddenly becomes larger; 2. The fuel injector is dripping or clogged; 3. The clutch of the air conditioner is slipped or damaged; 4. Air leakage in the air intake system; 5. The engine output power is insufficient. The solution to the high speed of the car engine is:

1. Adjust the throttle opening; 2. Replace the fuel injector, air conditioning clutch, air intake system, and engine. The speed refers to the number of revolutions per minute of the engine crankshaft, the speed of the engine, related to the number of times of work done per unit time or the size of the effective power of the engine, its role is: timely response to the operation of the engine, so that the driver can better cooperate with the transmission gear and throttle position, so that the car maintains a better working condition.

Long-term high rotational speed will cause a great burden on the engine due to overheating. The engine can be fully burned at high speed to reduce the generation of carbon deposits, but if the output torque of the vehicle is too large at 3500-4000 rpm, driving or shifting at this speed for a long time will cause the vehicle parts to bear excessive torque (engine, gearbox, tires, etc.), resulting in reduced life.

Long-term high rotational speed will cause a great burden on the engine due to overheating. The engine can be fully burned at high speed to reduce the generation of carbon deposits, but if the output torque of the vehicle is too large at 3500-4000 rpm, driving or shifting at this speed for a long time will cause the vehicle parts to bear excessive torque (engine, gearbox, tires, etc.), resulting in reduced life.

At the same time, it will also lead to an increase in fuel consumption, and the speed is too fast, the safety will also be reduced, when the 3500-4000 shift gear, whether the vehicle has a slight feeling of moving forward, if there is, it means that the vehicle has output excess torque in the speed range, and the shift speed can be appropriately reduced to achieve the best driving economy.

The effective power specified on the engine product label and its corresponding speed are called the rated power and the rated speed, respectively. The working condition of the engine at the rated power and rated speed is called the calibration condition. The rated power is not the maximum power that the engine can emit, it is the maximum effective power use limit formulated according to the use of the engine.

Photo by Q&A) M5 Trumpchi GS8 AION V Macchiato DHT PHEV Latte DHT Hiphi X @2019

High engine speed is caused by the idle switch not closing, the idle control valve is faulty, the intake pipe is leaking, etc.

1. The idle switch is not closed;

Fault analysis: When the idle contact is disconnected, the ECU determines that the engine is in a partial-load state, and the ECU determines the amount and time of injection based on the air flow sensor, crankshaft position, and speed signal. At this time, the engine is working under idle condition, and the air intake is small, resulting in an over-concentrated mixture and an increase in speed.

When the ECU receives the signal that the mixture is too concentrated from the oxygen sensor, it reduces the amount of fuel injected and increases the opening of the idle control valve, which causes the mixture to be too thin and reduces the speed. When the ECU receives the signal that the mixture is too dilute fed back by the oxygen sensor, it increases the amount of fuel injection, reduces the opening of the idle control control and valve, and causes the mixture to be too thick, so that the speed increases.

This repeats itself so that the engine idling is unstable. Turning on the air conditioner, turning the steering wheel, and turning on the lights at idle will increase the load on the engine, and in order to prevent the engine from stalling due to increased load, the ECU will increase the fuel supply to maintain the balanced operation of the engine. When the idle contact is disconnected, the ECU thinks that the engine is not in the idle condition, so the oil supply will not increase, so the speed does not increase.

2. The idle control valve is faulty;

Failure AnalysisThe normal idle speed of the EFI engine is guaranteed by the Idle Control Valve (ISC). According to the engine speed, temperature, throttle switch and air conditioning switch, the ECU calculates to open the intake side channel of the idle control valve or directly increase the opening of the throttle to increase the air intake volume to increase the engine idle speed; When the idle speed is higher than the set speed, the ECU will command the idle control valve to close the small intake hail pants side channel, so that the air intake volume is reduced and the engine speed is reduced.

The ECU will not be able to adjust the idle speed of the engine correctly, resulting in unstable idle speed.

3. Air intake pipe leakage;

The fault analysis can be seen from the idle control principle of the engine, under normal circumstances, the opening of the idle control valve and the air intake strictly follow a certain functional relationship, that is, the opening of the idle control valve increases, and the air intake increases accordingly.

The air intake pipe leaks, so that the air intake volume and the opening of the idle control valve do not strictly follow the original function relationship, and the air flow sensor cannot measure the real air intake, resulting in inaccurate control of the air intake volume by the ECU, resulting in unstable engine idling.