Title:
四輪駆動車両
Document Type and Number:
Japanese Patent JP4376589
Kind Code:
B2
Abstract:
A vehicle driving force control apparatus is configured to prevent co-rotation of a motor (4) caused by rotation of a pair of wheels (3L, 3R) when a clutch (12) connecting the wheels (3L, 3R) and the motor (4) is released (disconnected). The front wheels (1L, 1R) of the vehicle are driven by an engine (2) and the rear wheels (3L, 3R) are arranged and configured such that they can be driven by an electric motor (4). The clutch (12) is used as the device to connect and disconnect the motor (4) to and from the rear wheels (3L, 3R). The clutch (12) is released (disconnected) and the vehicle is shifted to two-wheel drive when, for example, the rotational speed Nm of the motor (4) exceeds a reference speed VC. When the clutch (12) is released, the motor (4) is braked by short circuiting the armature. The motor (4) is then braked again by setting the field current of the motor to 0 when the rotational speed Nm of the motor reaches 0. After the clutch (12) is released, a braking-direction field current is applied to the motor (4) in accordance with the decreasing rotational speed Nm of the motor (4) in such a manner that the braking force is decreased as the rotational speed of the motor decreases. Meanwhile, co-rotation of the motor (4) caused by low-temperature (high-viscosity) operating fluid of the clutch (12) or acceleration of the vehicle is reliably prevented by increasing the braking-direction motor field current when the temperature of the clutch operating fluid is low or when the vehicle acceleration is high.
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Inventors:
Profitability
Satoshi Nakajo
Yasuo Matsunaga
Satoshi Nakajo
Yasuo Matsunaga
Application Number:
JP2003369452A
Publication Date:
December 02, 2009
Filing Date:
October 29, 2003
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
B60W20/00; B60K6/20; B60K6/44; B60K6/52; B60K6/54; B60K17/354; B60K17/356; B60K23/08; B60L15/20; B60L50/16; B60W10/02; B60W10/08; F16D48/02
Domestic Patent References:
| JP2002240589A | ||||
| JP5821284Y2 | ||||
| JP200379004A |
Attorney, Agent or Firm:
Tetsuya Mori
Yoshiaki Naito
Cui Shu Tetsu
Toru Miyasaka
Yoshiaki Naito
Cui Shu Tetsu
Toru Miyasaka