FOUR-WHEEL DRIVE VEHICLE
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United States of America Patent
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Issued Date -
Nov 18, 2021
app pub date -
Apr 27, 2021
filing date -
May 14, 2020
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Abstract
A four-wheel drive vehicle includes a drive-power distribution device including (a) a clutch for distributing an engine drive power, between main and auxiliary drive wheels, (b) an electric motor, (c) a press mechanism for pressing the clutch by converting a rotary motion of the electric motor into a linear motion. The drive-power distribution device adjusts a torque capacity of the clutch to adjust a drive-power distribution ratio between the main and auxiliary drive wheels. The vehicle further includes a control apparatus for executing a drive-power distribution control for adjusting the drive-power distribution ratio, and an automatic-stop control for causing the engine to be automatically stopped upon satisfaction of an engine-stop condition. When the engine is in a stop state by execution of the automatic-stop control, the control apparatus inhibits change of the drive-power distribution ratio which is to be made by change of a rotational direction of the electric motor.
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