Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1987-03-16
1988-09-06
Pekar, John A.
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
B60K 1734
Patent
active
047686090
ABSTRACT:
A four wheel drive power transmission for a vehicle has a center differential device for distributing rotational power supplied from an engine to a front wheel propeller shaft and a rear wheel propeller shaft at a variable torque dividing ratio therebetween, and a mechanism for controlling the center differential device so as to vary the torque dividing ratio according to the magnitude of the torque of the rotational power supplied from the engine so that the torque dividing ratio is varied toward a decreased ratio for one of the front and rear wheel propeller shafts and an increased ratio for the other of the front and rear wheel propeller shafts as the magnitude of torque of the rotational power supplied from the engine increases. The torque loaded on one of the front and rear wheel propeller shafts is maintained not to exceed a determinate value as torque increases.
REFERENCES:
patent: 4572318 (1986-02-01), Cady
patent: 4618022 (1986-10-01), Hayashi
patent: 4650202 (1987-03-01), Tsuzuki
patent: 4671136 (1987-06-01), Katayama
patent: 4702341 (1987-10-01), Taga et al.
Kubo Seitoku
Taga Yutaka
Pekar John A.
Toyota Jidosha & Kabushiki Kaisha
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