Why is the engine speed so high?
2 Answers
Reasons for high engine speed: When the throttle opening is larger, the speed will increase. The gasoline engine throttle does not control the fuel injection amount, but rather the throttle opening. A smaller opening allows less air-fuel mixture to enter the cylinder, resulting in lower engine power output, and vice versa. The more air-fuel mixture enters the cylinder, the greater the combustion force, which increases the force pushing the piston, making the piston move faster and thus increasing the engine speed. An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, electric motors, etc. Internal combustion engines typically convert chemical energy into mechanical energy. Engines can refer to either the power generation device or the entire machine including the power unit.
That day I was driving my old buddy on mountain roads when the RPM suddenly shot up to 4000 but the speed wouldn't increase. I immediately pulled over and popped the hood, discovering the engine was freewheeling - a classic case of high gear with low speed. This kind of driving is particularly damaging to vehicles, especially manual transmission models where gear matching is crucial. Later when going downhill, I tried downshifting to slow down, and the engine immediately quieted down. So fellow drivers, when you see the tachometer needle jumping erratically, first check if you're in the right gear. Don't stubbornly press the accelerator - you might end up burning the clutch plates. Especially when driving long downhill sections, remember to use engine braking for safety.
