Back to results
US 4,981,190 AGranted
Torque distribution control system for a four wheel drive vehicle
AssigneeMazda Motor Corporation
InventorsYasunari Nakayama, Mitsuru Nagaoka
Life of this patent
Estimating the term…
Abstract
In a four wheel drive vehicle adapted to drive all of the four wheels, a braking force is applied to the wheel which causes slipping while the output torque of the engine is increased in accordance with brake operation. A braking pressure adjusting unit is preferably provided with each of the four wheels which is arranged so as to separately and individually brake the wheel which slips.
Claims19
A torque distribution control system for a four wheel drive vehicle comprising:
- a brake means disposed at each of four wheels independently and separately from each other;
- a braking pressure adjusting means disposed at each of two groups of the wheels;
- a slip value detecting means for detecting a slip value of each wheel with respect to pavement;
- a slipping-wheel judging means for judging a slipping wheel which slips in an actual slip value greater than a given target slip value by comparing the actual slip value detected by said slip value detecting means with the target slip value;
- a brake control means for operating said brake means against the group of the wheels containing the slipping wheel when the slipping wheel detected by said slipping-wheel judging means is contained only one of the two groups of the wheels;
- and
- an engine control means for operating an engine to increase its output torque in accordance with operation of said brake means when said brake control means is operated.
4 more elements
A torque distribution control system for a four wheel drive vehicle comprising:
- a brake means disposed at each of the four wheels independently and separately from each other;
- a braking pressure adjusting means disposed at each of the four wheels;
- a slip value detecting means for detecting a slip value of each wheel with respect to pavement;
- a slipping-wheel judging means for judging a slipping wheel which slips in an actual slip value greater than a given target slip value by comparing the actual slip value detected by said slip value detecting means with the target slip value;
- a brake control means for operating said brake means against the slipping wheel detected by said slipping-wheel judging means;
- and
- an engine control means for operating an engine to increase its output torque in accordance with operation of said brake means when said brake control means is operated.
4 more elements
Dependencies are inferred from the claim text.