초록 ▼

A power transmission system for vehicles comprising a driving member connected to an engine crankshaft, and a driven member connected to a driving wheel, the driving and driven members being connected with each other via a one-way clutch and a friction clutch which are disposed in parallel to each o

A power transmission system for vehicles comprising a driving member connected to an engine crankshaft, and a driven member connected to a driving wheel, the driving and driven members being connected with each other via a one-way clutch and a friction clutch which are disposed in parallel to each other. The one-way clutch is in a connected state when a forward load is applied to the engine, and in a disconnected state when a back load is applied to the engine. The friction clutch is operated to slip when it receives a torque greater than a predetermined value. With this arrangement, power is normally transmitted from the engine to the driving wheel through the one-way clutch and the friction clutch without any substantial power loss whereas a back load to be transmitted from the driving wheel to the engine in excess of a predetermined value is interrupted by the disconnection of the one-way clutch and the slipping of the friction clutch to prevent the engine from being subjected to any excessively great back load.

대표청구항 ▼

A power transmission for a vehicle having an engine with a crankshaft and a driving wheel, said power transmission comprising a power transmission system, a clutch, a pair of reduction gears in mesh with each other and drivingly connecting said power transmission system and said clutch, a speed chan

A power transmission for a vehicle having an engine with a crankshaft and a driving wheel, said power transmission comprising a power transmission system, a clutch, a pair of reduction gears in mesh with each other and drivingly connecting said power transmission system and said clutch, a speed change gear device connecting said clutch to the driving wheel, said transmission system being interposed between the crankshaft of the engine and said clutch and comprising a driving member for connection to the engine crankshaft, a driven member for connection to the clutch through the pair of reduction gears, and means operatively connecting said driving and driven members together including a one-way clutch means and a friction clutch means, said one-way clutch means being operative to connect said driving and driven members when a forward load is applied to the engine and being inoperative to disconnect said members when a back load is applied to the engine, said friction clutch means being operable to undergo slipping when it receives a torque greater than a predetermined level.