What are the working characteristics and principles of old-fashioned cars (such as cars in the sixties and seventies)?

The principle of automobile throttle is. By controlling the amount of pedaling, the throttle opening of the engine, the air intake and the oil quantity through the computer, the engine speed can be controlled.

After stepping on the accelerator, the throttle opening will increase, and the increase of throttle opening will increase the air flow into the air intake. At this time, the combustion heat release of the combustible mixture will also increase, thus increasing the work done by the gas on the piston and increasing the engine speed.

Working principle of automobile throttle valve

The throttle of a gasoline engine controls the throttle opening instead of the fuel injection quantity. That is, if the opening is small and the mixture entering the cylinder is small, the power generated by the engine will be small, and vice versa. The more mixed gas enters the cylinder, the greater the force generated by combustion, so the greater the force to push the piston, the faster the piston moves, and the faster the engine speed.

For gasoline engines, the throttle valve controls the opening of the throttle valve, thus affecting the intake of the engine. After stepping on the accelerator, fresh air enters, and the fuel injection quantity controlled by ECU also increases, so the force generated by combustion also increases, driving the engine to run faster.

The operation of the accelerator pedal should be based on the right heel stepping on the cab floor as the fulcrum, and the sole of the foot lightly stepping on the accelerator pedal, stepping down or relaxing with the extension and flexion of the ankle joint. When stepping on the accelerator pedal, the force should be gentle, so that you can step on it gently and lift it slowly.