System for controlling the propulsion on motor vehicles
First Claim
1. A system for controlling the propulsion on motor vehicles, to prevent undesired spinning of the driven vehicle wheels, comprisinga first control loop means for reacting to the state of motion of at least one driven vehicle wheel to activate a wheel brake when a wheel is tending to spin,a second control loop means for causing the output torque of the drive unit to be reduced in the event of a tendency of driven wheels on both sides of the vehicle to spin,a measuring means for sensing the speed of the vehicle to generate an output signal which is characteristic of said speed,a first comparator means triggered by at least one presettable threshold value vs1 of the speed of the vehicle for generating the output signal which effects the reduction of the drive torque as soon as this threshold value is exceeded and a signal is present, which indicates that at least one of a wheel-brake is being activated and one of the driven wheels is tending to spin,wherein a second higher speed threshold-value vs2 is preset, and further comprisinga vs2 comparator means for generating an output signal when the threshold value vs2 is being exceeded and as soon as only a single brake-control signal is present to indicate that one of the driven wheels is tending to spin,means responsive to the vs2 comparator means output-signal for causing the drive torque to be reduced,means for triggering the first comparator means by the first threshold value vs1 andmeans for activating the first comparator means in response to a sensing that the vehicle is following a curved path.
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Accused Products
Abstract
A system for controlling the propulsion on motor vehicles which not only enables the output torque of the drive unit of the vehicle to be utilized in an optimum manner in critical driving situations, especially under extreme road conditions, but also endows the vehicle with good stability and enhanced driving safety. A comparator is provided, in a propulsion control system which is triggered by at least one presettable or permanently preset threshold value of the speed of the vehicle, and generating an output signal causing the drive torque to be reduced, as soon as this threshold value is exceeded and a signal is present, which indicates that an individual wheel brake is being activated and/or that one of the driven wheels is tending to spin. The threshold value of the speed of the vehicle, which value governs the control process, is preferably regulated in accordance with the transverse acceleration which acts on the vehicle whenever it follows a curved path.
80 Citations
25 Claims
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1. A system for controlling the propulsion on motor vehicles, to prevent undesired spinning of the driven vehicle wheels, comprising
a first control loop means for reacting to the state of motion of at least one driven vehicle wheel to activate a wheel brake when a wheel is tending to spin, a second control loop means for causing the output torque of the drive unit to be reduced in the event of a tendency of driven wheels on both sides of the vehicle to spin, a measuring means for sensing the speed of the vehicle to generate an output signal which is characteristic of said speed, a first comparator means triggered by at least one presettable threshold value vs1 of the speed of the vehicle for generating the output signal which effects the reduction of the drive torque as soon as this threshold value is exceeded and a signal is present, which indicates that at least one of a wheel-brake is being activated and one of the driven wheels is tending to spin, wherein a second higher speed threshold-value vs2 is preset, and further comprising a vs2 comparator means for generating an output signal when the threshold value vs2 is being exceeded and as soon as only a single brake-control signal is present to indicate that one of the driven wheels is tending to spin, means responsive to the vs2 comparator means output-signal for causing the drive torque to be reduced, means for triggering the first comparator means by the first threshold value vs1 and means for activating the first comparator means in response to a sensing that the vehicle is following a curved path.
Specification