EP0477082A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Traction control system for automotive vehicle
Assignee: Nissan Motor Co Ltd
•
Filing: 1991-09-16
•
Granted: —
•
Expires: 2011-09-16
Abstract
Abstract A traction control system for an automotive vehicle is responsive to an excessive magnitude of wheel slippage to lower driving torque supplied to driving wheels (14) for resuming sufficient level of tire/road traction. The traction control system includes a catalyzer temperature sensor (20) for monitoring a catalyzer in exhaust system of an automotive vehicle, to produce a catalyzer temperature indicative signal. A control unit (10) in the traction control system is responsive to the catalyzer temperature indicative signal as it represents a catalyzer temperature in excess of a predetermined catalyzer temperature criterion, to inhibit an engine output control mode operation in which adjustment for an engine output is controlled, and to initiate a transmission control mode operation in which a transmission speed ratio of an automatic power transmission (16) is shifted-up to lower the driving torque supplied to the driving wheels.
Inventors
- 👤 Takashi Imaseki
- 👤 Minoru Tamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 06:20
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/10; B60K28/16; B60K28/165; B60W; B60W2510/00; B60W2510/06; B60W2510/068; F; F16; F16H; F16H59/00; F16H59/74; F16H2059/743; F16H59/78; F16H61/00; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0213
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A traction control system for an automotive vehicle, comprising: first means for monitoring wheel slippage condition of a driving wheel which is coupled with an internal combustion engine and supplied with a driving torque from the engine through a power train including an automatic power transmission, and for providing a wheel slippage indicative signal; second means for monitoring a temperature condition of an exhaust gas purifier in an exhaust system of the engine, and for providing a temperature indicative signal; and third means, responsive to said wheel slippage indicative signal, for initiating a traction control by selectively performing a first and a second control mode operations, said third means normally performing the first control mode operation to adjust an engine driving parameter and control the output torque of the engine, and performing the second control mode operation while inhibiting the first control mode operation when said temperature indicative signal represents that the temperature of said exhaust gas purifier exceeds a predetermined temperature criterion, to shift-up transmission speed ratio of said automatic power transmission and lower the driving torque to be supplied to said driving wheel.
Claim 2
Dependent Claim
35 words
A traction control system as set forth in claim 1, wherein said third means performs said first control mode operation by adjusting air/fuel ratio of air/fuel mixture to be supplied to said internal combustion engine.
Claim 3
Dependent Claim
27 words
A traction control system as set forth in claim 1, wherein said third means performs said first control mode operation by adjusting fuel delivery for said engine.
Claim 4
Dependent Claim
24 words
A traction control system as set forth in claim 3, wherein said third means performs fuel cut-off operation during said first control mode operation.
Claim 5
Dependent Claim
25 words
A traction control system as set forth in claim 4, wherein said third means performs fuel cut-off operation for a limited number of engine cylinders.
Claim 6
Dependent Claim
190 words
A traction control system for an automotive vehicle, comprising: wheel slippage detecting means for monitoring wheel slippage condition of a driving wheel coupled with an internal combustion engine and supplied with a driving torque from the engine through a power train including an automatic power transmission, and for providing a wheel slippage indicative signal; catalyzer temperature detecting means for monitoring a temperature condition of a catalyzer provided for a catalytic converter in an exhaust system of the engine, and for providing a temperature indicative signal; and control means, responsive to said wheel slippage indicative signal, for initiating a traction control operation by selectively performing a first and a second mode operations, said control means normally performing a first control mode operation to adjust an engine operation and control the output torque of the engine, and performing a second control mode operation while inhibiting said first control mode operation when said temperature indicative signal represents a temperature of said exhaust gas purifier in excess of a predetermined temperature criterion, to shift-up transmission speed ratio of said automatic power transmission and lower the driving torque to be supplied to said driving wheel.
Claim 7
Dependent Claim
177 words
A traction control system for an automotive vehicle comprising: a first wheel speed sensor for monitoring wheel speed of a driving wheel coupled with an internal combustion engine and supplied with driving torque from the engine through an automatic power transmission, for producing a first wheel speed indicative signal; a second wheel speed sensor for monitoring wheel speed of a driven wheel which is free from said internal combustion engine and producing a second wheel speed indicative signal; a catalyzer temperature sensor for monitoring temperature condition of a catalyzer in a catalytic converter and producing a catalyzer temperature indicative signal; and control means for receiving said first and second wheel speed indicative signals and deriving a wheel slippage of the driving wheel, said control means selectively performing a first mode traction control operation for adjusting the engine output torque, and a second mode traction control operation for adjusting supply of the driving torque to said driving wheel across said automatic power transmission depending upon the temperature condition of said catalyzer represented by said catalyzer temperature indicative signal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.