Which is to increase traction and which is to increase power when stepping on the accelerator or shifting gears?

If separation is necessary, stepping on the accelerator will increase power. Because according to the law of conservation of energy, when stepping on the accelerator, a lot of engine oil will be consumed per unit time, so assuming that the engine oil is completely burned, it will increase the energy (that is, power) generated per unit time, thus increasing the power of the engine.

The purpose of shifting gears is to change the gears connected between the wheels and the engine. Under the condition of constant engine speed, the wheel speed can be reduced after gear shifting. According to p=fv, it can be concluded that F (that is, the output traction) will increase.

Throttle, also known as "throttle" and "throttle". Refers to the control device that controls the engine power (thrust). On the piston aero-engine, the throttle valve controls the opening of the carburetor to control the filling amount of the cylinder, thus determining the output power of the engine.

On the gas turbine engine, the throttle valve controls the metered fuel flow of the fuel regulator, thus determining the thrust generated by the engine.

The position of the throttle is controlled by the driver operating the throttle lever in the cockpit, and it is transmitted to the carburetor or fuel regulator on the engine through control system components such as pull rod, rocker arm, torsion tube, steel cable, pulley and sector wheel. On an airplane, the throttle lever is always pushed forward to increase power (thrust) and pulled back to decrease power (thrust).