Patent EP0440132A1 successfully refreshed from Google Patents.
EP0440132A1
Expired / Lapsed
EP
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Slip control system for motor vehicle
Assignee: Mazda Motor Corp
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Filing: 1991-01-28
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Granted: —
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Expires: 2011-01-28
Abstract
Abstract A slip control system for a motor vehicle controlling slips in driving wheels comprising, a sensor for detecting a slip ratio of each driving wheel, a device for decreasing a slip of each driving wheel by controlling a driving force transmitted to the driving wheel so that the slip ratio of the driving wheel is at least equal to predetermined desired slip ratio when the slip ratio of the driving wheel is equal to the desired slip ratio, a sensor for detecting a yawing rate of the vehicle, and a sensor for detecting a steering amount of the vehicle, said slip decreasing device including correcting device for decreasing the desired slip ratio when a steering condition is detected based on amounts detected by both the yawing rate detecting sensor and the steering amount detecting sensor.
Inventors
- 👤 Akira Sone
- 👤 Toshiaki Tsuyama
- 👤 Kazutoshi Nobumoto
- 👤 Fumio Kageyama
- 👤 Haruki Okazaki
- 👤 Makoto Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:29
CPC Classifications
B; B60; B60K; B60K28/00; B60T; B60T8/00; B60T8/17; B60T8/175
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
131 words
A slip control system for a motor vehicle controlling slips in driving wheels comprising: means for detecting a slip ratio of each driving wheel; means for decreasing a slip of each driving wheel by controlling a driving force transmitted to the driving wheel so that the slip ratio of the driving wheel is at least equal to predetermined desired slip ratio when the slip ratio of the driving wheel is equal to the desired slip ratio; means for detecting a yawing rate of the vehicle; and means for detecting a steering amount of the vehicle; said slip decreasing means including correcting means for decreasing the desired slip ratio when a steering condition is detected based on amounts detected by both the yawing rate detecting means and the steering amount detecting means.
Claim 2
Dependent Claim
128 words
A slip control system for a motor vehicle in accordance with claim 1 in which said correcting means decreases the desired slip ratio by first correction amount when the yawing rate which is more than or equal to predetermined value is detected by the yawing rate detecting means and the steering amount which is equal to or less than predetermined value is detected by the steering amount detecting means, and decreases the desired slip ratio by second correction amount which is smaller than the first correction amount when the yawing rate which is more than or equal to predetermined value is detected by the yawing rate detecting means and the steering amount which is more than or equal predetermined value is detected by the steering amount detecting means.
Claim 3
Dependent Claim
133 words
A slip control system for a motor vehicle controlling slips in driving wheels comprising: means for detecting a slip ratio of each driving wheel; brake control means for decreasing a slip of each driving wheel independently by controlling brake fluid pressure in each driving wheel so that the slip ratio of each driving wheel is at least equal to predetermined desired slip ratio when the slip ratio of each driving wheel is equal to the desired slip ratio; and means for detecting a yawing rate of the vehicle; said brake control means controlling the brake fluid pressure in each driving wheel equally based on the desired slip ratio of each driving wheel when the yawing rate which is more than or equal to predetermined value is detected by the yawing rate detecting means.
Claim 4
Dependent Claim
28 words
A slip control system for a motor vehicle in accordance with claim 1 or 3 in which said yawing rate detecting means includes a yawing rate detecting sensor.
Claim 5
Dependent Claim
31 words
A slip control system for a motor vehicle in accordance with claim 1 or 3 in which said yawing rate detecting means includes a steering sensor and a vehicle speed sensor.
Claim 6
Dependent Claim
25 words
A slip control system for a motor vehicle in accordance with claim 1 or 3 in which said system further comprises an ABS control system.
Claim 7
Dependent Claim
43 words
A slip control system for a motor vehicle in accordance with claim 1 in which said slip decreasing means includes brake control means for controling a driving force of the driving wheel and engine control means for controling an output of an engine.
Claim 8
Dependent Claim
33 words
A slip control system for a motor vehicle in accordance with claim 7 in which said enging control means decreases the output of the engine by controlling an opening of a throttle valve.
Claim 9
Dependent Claim
33 words
A slip control system for a motor vehicle in accordance with claim 8 in which said enging control means includes a throttle opening control mechanism which controls the opening of the throttle valve.
Claim 10
Dependent Claim
48 words
A slip control system for a motor vehicle in accordance with claim 3 in which said brake control means decreases the slip of each driving wheel equally based on the driving wheel contacting on a road surface whose friction coefficient is smaller than that of another road surface.
Claim 11
Dependent Claim
37 words
A slip control system for a motor vehicle in accordance with claim 3 in which said brake control means decreases the slip of each driving wheel equally based on an average slip ratio of both driving wheels.
Claim 12
Dependent Claim
97 words
A slip control system for a motor vehicle controlling slips in driving wheels comprising: brake force control means for controlling a slip ratio of each driving wheel by controlling a brake force of each driving wheel; means for detecting a steering condition of the vehicle; means for detecting a small accelerator opening condition of the vehicle; and means for decreasing a brake force control gain in the brake force control means when both the steering condition and the small accelerator opening condition are detected by the steering condition detecting means and small accelerator opening condition detecting means.
Claim 13
Dependent Claim
58 words
A slip control system for a motor vehicle in accordance with claim 12 in which said system further comprises means for detecting a yawing rate of the vehicle, the larger the yawing rate output from the yawing rate detecting means being, in the larger degree said brake force control gain decreasing means decreasing the brake force control gain.
Claim 14
Dependent Claim
46 words
A slip control system for a motor vehicle in accordance with claim 12 in which said small accelerator opening condition detecting means is means for detecting an engine brake condition of the vehicle, and in which said small accelerator opening condition is an engine brake condition.
Claim 15
Dependent Claim
37 words
A slip control system for a motor vehicle in accordance with claim 14 in which said engine brake condition detecting means includes a sensor for detecting an accelerator opening and a sensor for detecting a sift position.
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