CLUTCH ACTUATING HYDRAULIC CIRCUIT

摘要

This invention relates to a clutch actuating hydraulic circuit that is suitable for reduction of output loss in the clutch actuating hydraulic circuit. For this purpose, the clutch actuating hydraulic circuit comprises a switching valve (6) provided in a pressure circuit (31) between a hydraulic pump (2a) and a clutch (7) and a pressure limiting valve (5) provided between the reflux circuit (9) of the valve (6) and the aforementioned pressure circuit (31), a switching valve (8) that switches between the discharge oil of the other hydraulic pump (2b) and that of the first pump (2a) is provided and a circuit on the downstream side of this switching valve (8) is connected to the aforementioned pressure circuit (31) and the aforementioned reflux circuit (9), thereby the discharge oil from the other hydraulic pump (2b) joins the discharge oil from the first hydraulic pump (2a) increasing the flow to the clutch (7) when the clutch is engaged or disengaged.