What is the method for matching engine speed with gear position?

[Serenity]

Methods for matching engine speed with gear position: 1. When accelerating, first shift to a higher gear, the engine speed will increase, and the torque on the gears will become larger; 2. For high-speed cruising, use a higher gear to reduce engine speed; 3. When going downhill, use a lower gear to assist with engine braking and reduce speed; 4. When climbing a steep slope, shift to a lower gear to increase torque on the gears, allowing the vehicle to climb smoothly. Principles of engine operation: 1. Mix air and gasoline in a certain proportion to form a combustible mixture; 2. The intake stroke draws the mixture into the cylinder, where it is compressed, ignited, and burned to generate thermal energy; 3. The high-temperature, high-pressure gas acts on the top of the piston, driving the piston to perform reciprocating linear motion, and mechanical power is output externally through the connecting rod, crankshaft, and flywheel mechanism.