The principle behind the reduction of reaction force during vehicle gear changes in a one-way pulley (OAP) primarily relies on its internal one-way clutch mechanism. The specific working process is as follows:

Working Principle

Function of the one-way clutch: A one-way clutch is installed inside the one-way pulley, allowing the outer ring (the part in contact with the belt) and the inner ring (connected to the generator rotor) to rotate relatively independently under specific conditions.

Dynamic changes during shifting: When the vehicle shifts gears, the engine speed suddenly drops. At this time, a traditional two-way pulley will continue to rotate due to the inertia of the generator rotor, thus causing reverse tension on the belt, increasing the reaction force between the belt and the engine.

Decoupling function of the one-way pulley: When the engine speed drops, the inner ring (generator rotor) of the one-way pulley continues to rotate at high speed due to inertia, while the outer ring slows down synchronously with the belt. Due to the action of the one-way clutch, the inner and outer rings will temporarily disengage, thus avoiding the generation of reverse tension.

Buffering and protection: This decoupling mechanism creates a brief buffer state at the moment of shifting, reducing the impact and vibration caused by the speed difference. This not only reduces belt wear but also protects the generator rotor and shaft from reverse forces.

Specific Impacts

Reduced reaction force: Through the decoupling mechanism, the one-way pulley significantly reduces the reaction force between the engine and the generator during gear changes, reducing changes in belt tension.

Reduced noise and vibration: Reduces belt vibration and noise caused by shifting impacts, improving driving comfort.

Protection of belt and generator: Reduces reverse tension on the belt, extending its service life, and protects the generator from mechanical impacts.

Optimized driving experience: Reduces the jerky feeling during gear changes, making the vehicle's gear shifting response smoother and improving the driving experience.