When I push the gas paddle, the engine speed is immediately sped up like 3 time but the car is only accelerating slowly, what mechanism is it that make cars acceleration not like the ones like bikes where the “engine” speed is the synced with the wheel speed?
In: Engineering
Most cars in the US have automatic transmissions, and most of those are coupled to the engine by a torque converter. The torque converter is essentially two turbines. The turbine on the engine spins a fluid inside the torque converter, and that fluid spins the turbine coupled to the transmission. Due to that coupling, the input speed will not always match the output speed. On top of that, gears in the transmission and differential multiply the torque of the engine, so that even a thousand revolutions a minute might translate to only a few miles an hour
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