Motor vehicles – Having four wheels driven
Patent
1987-10-27
1988-12-20
Mitchell, David M.
Motor vehicles
Having four wheels driven
180248, B62D 1734
Patent
active
047920092
ABSTRACT:
A four wheel drive vehicle comprising dirigible front wheels and nondirigible rear wheels. Drive of an engine is transmitted to the front and rear wheels through a propelling drive transmission for producing at least two, high and low, speeds, a front wheel change speed mechanism, and a rear wheel change speed mechanism. The front and rear wheel change speed mechanisms are controlled by a control device to produce a high speed state with the front wheels accelerated when a steering angle of the front wheels exceeds a predetermined angle and the propelling drive transmission is in a low speed position, to produce a low speed state with the front wheels accelerated when the steering angle of the front wheels exceeds the predetermined angle and the propelling drive transmission is in a high speed position, and to produce a standard state in which the front and rear wheels are driven at the same speed when the steering angle of the front wheels is below the predetermined angle.
REFERENCES:
patent: 4574910 (1986-03-01), Miki et al.
patent: 4609064 (1986-09-01), Suzuki et al.
patent: 4669559 (1987-06-01), Fukui
patent: 4715467 (1987-12-01), Sakai
Kubota Ltd.
McGiehan Donn
Mitchell David M.
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