Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Reexamination Certificate
2006-05-23
2006-05-23
Morris, Lesley D. (Department: 3611)
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
C180S247000, C701S069000
Reexamination Certificate
active
07048084
ABSTRACT:
A CPU computes a throttle opening degree increasing speed Vθh and a steering wheel angular velocity Vθ based on a throttle opening degree θh and a steering wheel angle θ. Based on the throttle increasing speed Vθh and the steering wheel angular velocity Vθ, the CPU selects one of a first drive mode and a second drive mode. The CPU controls the power transmission ratio of a power transmitting device according to the selected drive mode. Therefore, the power transmission ratio of the power transmitting device is properly controlled in accordance with the degree of intention for acceleration of the driver, which is computed based on the throttle increasing speed Vθh, and the turning speed of the steering wheel, which is computed based on the steering wheel angular velocity Vθ. Therefore, the drive mode is properly switched in accordance with the driving state of a four-wheel drive vehicle.
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Fumoto Hisao
Hirokane Yutaka
Murakami Tsuyoshi
Shigeta Ryouhei
Lum L.
Morris Lesley D.
Toyoda Koki Kabushiki Kaisha
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