B - Operations – Transporting – 60 – K
Patent
B - Operations, Transporting
60
K
341/68
B60K 23/08 (2006.01)
Patent
CA 1197596
Abstract of the Disclosure A system for a four wheel drive vehicle for automatically changing a power transmission system of the engine of the vehicle from two-wheel driving system to four-wheel driving system in accordance with road surface condition and driving condition. The transmission system is provided for transmitting power from the engine to two main driving wheels, and a clutch is provided for trans- mitting the power of the engine to driving two wheels other than the main driving wheels. Speed sensors are provided for producing output signals dependent on speeds of four wheels, respectively. A steering angle sensor is provided for producing an output signal dependent on the steering angle. Computation circuits are provided to compute an actual slip rate from the output signals of the speed sensors and to compute a theoretical slip rate from the output of the steering angle sensor. A comparing circuit compares the actual slip rate and the theoretical slip rate with each other and produces an output signal for a set time when the difference between both slip rates exceeds a predetermined level. The output signal operates the clutch for establishing four-wheel drive.
406618
Fuji Jukogyo Kabushiki Kaisha
Ridout & Maybee Llp
LandOfFree
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