my summer car tachometer

• 2022-04-20

Cars have a speed indicator, so the speed of the car can be controlled by itself. During driving, the engine speed of the car is probably about 2200-2500. No matter in which gear, keep the engine speed at about 2200-2500. The car cannot move at too low speed, the fuel consumption is not in the aisle, and the engine is also injured; Excessive speed increases invalid fuel consumption and damages the engine.

When shifting gears, add a little more oil than the normal driving state to make the speed express a little more than 2500. Once the gear is shifted below 2000 rpm, the speed will drop after shifting. It feels like it is out of gear. You have to refuel to get it back, but you have to consume more fuel.

The automobile tachometer can intuitively understand the working state of the engine, which is equivalent to the Health Barometer of the engine. The engine tachometer generally corresponds to the speed of the automobile, and what speed corresponds to what gear. The greater function of the tachometer is for the manual shift vehicle, because when the driver operates the manual shift vehicle, the speed of the tachometer generally corresponds to the speed in a reasonable range, which can directly observe the speed of the engine tachometer, the driver has more confidence in the operation process, the shift operation is smoother, and the smoothness shift is more reasonable for the operation of the engine.

It has something to do with the transmission gear. If it's a car with automatic transmission, you have to judge the gears of "more than 2500 revolutions" and "more than 3000 revolutions". It's also about resistance. The same gear, different roads, and even different windward resistance on the same road require different engine power to maintain a speed of 150 per hour. Of course, if these conditions are the same, it is the problem of vehicle condition: the engine, transmission, brakes, tires and so on may cause this situation. Specific verification and judgment are required. Usually, it is enough to maintain it at about 3000 when using it. There can be no low-grade high-speed and high-grade low-speed situations. Turning from 2000 to 3000, the low-grade high-speed engine is labor-saving, but it consumes fuel. The climbing is better. The high-grade low-speed engine is laborious. It will damage the engine for a long time and save fuel. This will damage the engine.