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US 2003/0150660 A1Published application
Traction distribution control system for four-wheel drive vehicle
AssigneeHitachi Unisia Automotive, Ltd.
InventorNobuyuki Ohtsu
Life of this patent
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Abstract
A traction distribution control system for a 4WD vehicle is constructed to calculate a difference gain in accordance with a difference in spinning state between main driving wheels, and determine a control signal for controlling traction distribution to driven wheels by multiplying a control amount by the difference gain.
Claims20
A four-wheel drive vehicle, comprising:
- a source of traction;
- a device which transfers traction;
- main driving wheels which receive traction from the source;
- driven wheels which form at least a state of receiving smaller traction than traction transmitted to the main driving wheels through the device, the driven wheels receiving traction which can be changed through the device;
- and
- an ECU which controls distribution of traction to the driven wheels, the ECU being so programmed as to:
- form a control signal for operating the device in accordance with an input signal,
- calculate a difference in spinning state between the main driving wheels, and
- determine the control signal in accordance with the difference.
6 more elements
A four-wheel drive vehicle, comprising:
- a source of traction;
- means for transferring traction;
- main driving wheels which receive traction from the source;
- driven wheels which form at least a state of receiving smaller traction than traction transmitted to the main driving wheels through the transferring means, the driven wheels receiving traction which can be changed through the transferring means;
- and
- means for controlling distribution of traction to the driven wheels, the controlling means comprising:
- means for forming a control signal for operating the transferring means in accordance with an input signal,
- means for calculating a difference in spinning state between the main driving wheels, and
- means for determining the control signal in accordance with the difference.
6 more elements
A method of controlling traction distribution in a four-wheel drive vehicle with a traction source, a traction transfer device, main driving wheels, and driven wheels, the method comprising:
- forming a control signal for operating the traction transfer device in accordance with an input signal;
- calculating a difference in spinning state between the main driving wheels;
- and
- determining the control signal in accordance with the difference.
1 more element
Dependencies are inferred from the claim text.