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List of contents of this article:

• 1, What's wrong with the shaking of the car tachymeter?
• 2、The car tachometer is more or less normal
• 3, What is the reason for the up and down jitter of the tachometer pointer
• 4 
  、How to view the fault of the tachometer
• 5,import data visualization What does a car tachymeter mean?
• 6, The function and description of the engine tachmeter of the car dashboard

What's wrong with the shaking of the car tachymeter?

Engine feet are aging.When the engine is running, the engine legs can absorb slight vibrations. If the engine foot is aging, it will cause speed shake, so the engine foot needs to be replaced. Tire bulge. The speed of the car is shaking, and the body is skewed. It may be that the tire is bulging and needs to be repaired or replaced. The hub is deformed.

Causes for tachometer shaking: water accumulation in the throttle valve, carbon accumulation in the throttle valve, and the air intake duct is too dirty; when the intake duct is blocked, the idle speed will be pulled, but there is carbon and oil in the throttle valve. This is the most common reason for idle instability.

The reason for the shaking of the tacometer pointer up and down is the failure of the oxygen sensor of the car. If you need to go to the 4S store or repair shop of the car in time to overhaul or replace the oxygen sensor of the car, you can solve the shaking of the tactometer up and down. The tactometer pointer shakes up and down, which is a manifestation of idle instability.

Insufficient oil supply or uneven air intake: When the tachometer pointer jitters up and down, it is likely to be caused by insufficient oil supply or uneven air intake of the car; in this case, it will directly affect the working performance of the engine, so the speed will be high and low at this time, then The tachymeter pointer can't fall back normally when it is displayed.

If the tachmeter pointer of the car shakes up and down, as long as the shaking amplitude is not very large, this is a normal phenomenon.

How much is normal

1. The normal value of the engine speed when the car is running is 2000 to 3500r/min Between; The normal value of the engine speed at idle speed is between 600 and 900r/min, and the engine speed of the vehicle will also be different in different states. Just compare according to the above range.

2. It is normal for the engine tachmeter to be between 1000 and 3500. At about 3000 rpm, the engine output torque is the largest, and then it is inversely proportional to the speed. The general engine idles at 1000 rm, and after starting, it reaches 1500 rm. If the speed does not exceed 15, it will be changed to 2nd gears. In the future, the gear upgrade will basically be 2000 runs until the highest gear.

3. The car tachymeter from 2200 to 2500 is normal. Generally speaking, the tachometer is divided into several areas. The white scale area is the safe speed range, the red scale part is the dangerous speed range, and some models are also divided into green areas, which indicates that the speed is the more economical range of the engine.

4. It is normal for the engine tachmometer to be 2200-2500. The car has a speed indicator, so the speed of the car can be controlled by yourself. During driving, the engine speed of the car is about 2200-2500. No matter which gear is hung, the engine speed will remain at about 2200-2500. Speeding will increase the ineffective fuel consumption and damage the engine.

5. The automatic transmission car tachometer is 1500 to 2000 rpm normal.When the automatic transmission car changes gears, when the driving speed reaches 20 yards and the rotation speed is 1500 to 2000, it can be changed to 2nd gear. When the rotation speed reaches more than 2000, it can be changed to 3rd gear, which will reach 30 yards; in the same way, when the driving speed reaches 50 yards, it can be changed to 4th gear.

What is the reason for the up and down jitter of the tachometer pointer

1. The reason for the up and down jitter of the tachometer pointer is the failure of the oxygen sensor of the car. If you need to go to the 4S store or repair shop of the car in time to overhaul or replace the oxygen sensor of the car, you can solve the shaking of the tactometer up and down. The tactometer pointer shakes up and down, which is a manifestation of idle instability.

2. On the dashboard of the vehicleThe tachometer can let the driver know the current speed of the engine, but sometimes there may be some abnormalities in the tachometer on the vehicle, such as the tachometer pointer floating up and down.

3. If the tachometer pointer of the car shakes up and down, as long as the shaking amplitude is not very large, this is a normal phenomenon.

4. The tachmeter pointer shakes up and down, which is a manifestation of idle instability. If you haven't done maintenance for a long time, go to a 4S store or a professional auto repair shop for maintenance first, and replace spark plugs, fuel filters and other parts, which can generally solve the problem.

What do you think of the fault of the tachometer

1. Specifically, the fault light of the tachometer includes four types: the high water temperature indicator light is usually a red thermometer.When this indicator light is on, it means that the temperature of the cooling system is too high, and you need to be careful that the engine will be seriously worn; the oil pressure warning light is in the shape of a red oil pot.

2. There is also a fault light display on the tachymeter. The fault light indicates different problems, as follows: the high water temperature indicator light is usually a red thermometer. When this indicator light is on, it means that the temperature of the cooling system is too high, and it should be noted that the engine may cause serious wear.

3. The tachometer pointer does not move due to the disconnection of the flexible shaft connection in the tachmeter; the tachometer pointer does not move because the tachometer pointer falls off or gets stuck; there is a foreign object in the dashboard, causing the pointer to be unable to rotate; there is a problem with the line in the tachometer, aging or burning. It is a real-time display of the speed of the vehicle.

4. The first is that the oil lamp on the dashboard lights up. There are two possibilities.First, the lack of oil causes the engine to be completely lubricated by the oil. Under normal circumstances, the oil will not be consumed in large quantities, so it is possible that the oil is leaking. The second reason is the insufficient pressure of the oil pump.

5. There are a lot of meters on the dial of the car, including water temperature meter, tachometer, speed meter, fuel meter, charging meter, etc. The water temperature meter can see whether the water temperature of the engine is good, and the tachometer can see the real-time speed of the engine. When the speed of the vehicle becomes faster, the speed of the engine will also increase. .

6. Generally speaking, the tachometer is divided into several areas. The white scale area is the safe speed range, the red scale part is the dangerous speed range, and some models are also divided into green areas, which indicates that the speed is the more economical use range of the engine.

What does a car tacmometer mean?

1. The tachometer expresses the speed of the engine. Tachmeters are often used in motors, electric fans, papermaking, plastics, chemical fibers, washing machines, automobiles, airplanes, ships and other manufacturing industries. Most commonly used are hand-held centrifugal tachometers. Tachometer measurement is indispensable in all fields of the national economy.

2. The car tachometer means the speed of the engine. That is, it shows the speed of the engine per minute. The tachometer is generally set to be placed symmetrically with the odometer in the dashboard. And the data on the car's tachymeter represents how many rotations the engine rotates per minute.

3. The car speed in the speed table refers to the engine speed, that is, the speed per minute of the crankshaft of the engine, which reflects the working condition of the engine.The tachemometer shows the speed of the car.

Function and description of the engine tachometer of the car dashboard

If the engine idle speed is too high or too low, and the speed is unstable under normal circumstances, it basically means that there is something wrong with the engine. Therefore, frequent observation of the tachymeter when driving can better control the car and detect car faults early.

Indicate the safe operating area of the engine. After knowing the area of the tachometer, it is easy to intuitively know whether the speed is within the safe range. There are several areas on the speedometer. The white scale area indicates that the current speed of the car is within the safe speed range, while the red scale area indicates the dangerous speed range.

The number pointed by the pointer multiplied by 1000 is the engine speed.The tachometer can intuitively display the speed of the engine under various working conditions. The driver can know the operation of the engine at any time, grasp the timing of shifting gears, and match the gear position of the transmission with the throttle position, so as to keep it in the best working state, reduce fuel consumption and extend the life of the engine.