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What is the principle of hydraulic retarder braking?

1 Answers

FaithLee

08/29/25 3:16am

Hydraulic retarder braking utilizes liquid damping to generate a deceleration effect. Below is an introduction to the principle of hydraulic retarder braking: 1. Hydraulic retarder braking uses liquid damping to produce a deceleration effect and can be installed in front of or behind the transmission. When a vehicle is going downhill, exhaust braking is employed, which offers good braking performance. However, for heavy-duty trucks with substantial tonnage, the effectiveness of exhaust braking is relatively limited and can also harm the engine. Therefore, certain large vehicles, especially mining dump trucks equipped with hydraulic-mechanical transmissions, are fitted with hydraulic retarders. 2. The hydraulic retarder can be integrated with the transmission, featuring small size and mass, with minimal wear during operation. The heat generated during operation is easily dissipated, and the wheels do not slip when braking on slippery roads. However, the engagement and disengagement times are relatively long, and there is a corresponding power loss when not in operation.

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