Wheel slip control system
First Claim
1. A wheel control system comprising:
- vehicle speed detecting means for detecting a vehicle running speed;
driving wheel rotating condition detecting means for detecting an actual driving wheel rotating speed of a vehicle and an acceleration thereof;
advance driving wheel speed computing means for calculating an advance driving wheel speed using as parameters said actual driving wheel rotating speed and acceleration;
a throttle valve provided in an engine intake passage;
drive means for opening and closing said throttle valve; and
opening/closing control means for determining a target throttle position based on said detected vehicle running speed and said advance driving wheel speed, and for controlling said drive means so that (a) an actual throttle position of said throttle valve approaches said target throttle position, and (b) said advance driving wheel speed falls under an optimum range, said opening/closing control means including;
upper limit and lower limit setting means for setting upper and lower limit values using said vehicle running speed as a parameter, said upper and lower limit values defining a range for comparison with said advanced driving wheel speed,mode setting means for setting an opening mode when said advance driving wheel speed becomes lower than said lower limit value, setting a closing mode when said advance driving wheel speed exceeds said upper limit value, and setting a holding mode in the other speed range than that set above, andtarget throttle position initializing means for (1) determining a stand-by speed on the basis of said vehicle running speed and upon an increase of said advance driving wheel speed in excess of said stand-by speed, (2) setting an actual throttle position at a position moved by a predetermined value from a fully open position in the opening mode, and (3) setting the actual throttle position at a position moved by a predetermined value from a fully closed position in the closing mode.
1 Assignment
0 Petitions
Accused Products
Abstract
A wheel slip control system has a vehicle speed detector for detecting a running speed of a vehicle; a driving wheel rotating condition detector for detecting an actual driving wheel rotating speed of the vehicle and the acceleration thereof; an advance driving wheel speed computer for calculating an advance driving wheel speed using as parameters the above actual driving wheel rotating speed and acceleration thereof; a second throttle valve provided in an intake passage in a position upstream or downstream of the position where a first throttle valve interlocked with a vehicle accelerator pedal is located; a driver for opening and closing the second throttle valve; and an opening/closing controller for determining a target throttle position on the basis of the detected vehicle running speed and the advance driving wheel speed and controlling the driver so that an actual throttle position of the second throttle valve approaches the above target throttle position. According to above-mentioned characteristics, it is possible to attain superior acceleration and controllability, and the air fuel ratio and fuel consumption are held in a good condition.
49 Citations
5 Claims
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1. A wheel control system comprising:
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vehicle speed detecting means for detecting a vehicle running speed; driving wheel rotating condition detecting means for detecting an actual driving wheel rotating speed of a vehicle and an acceleration thereof; advance driving wheel speed computing means for calculating an advance driving wheel speed using as parameters said actual driving wheel rotating speed and acceleration; a throttle valve provided in an engine intake passage; drive means for opening and closing said throttle valve; and opening/closing control means for determining a target throttle position based on said detected vehicle running speed and said advance driving wheel speed, and for controlling said drive means so that (a) an actual throttle position of said throttle valve approaches said target throttle position, and (b) said advance driving wheel speed falls under an optimum range, said opening/closing control means including; upper limit and lower limit setting means for setting upper and lower limit values using said vehicle running speed as a parameter, said upper and lower limit values defining a range for comparison with said advanced driving wheel speed, mode setting means for setting an opening mode when said advance driving wheel speed becomes lower than said lower limit value, setting a closing mode when said advance driving wheel speed exceeds said upper limit value, and setting a holding mode in the other speed range than that set above, and target throttle position initializing means for (1) determining a stand-by speed on the basis of said vehicle running speed and upon an increase of said advance driving wheel speed in excess of said stand-by speed, (2) setting an actual throttle position at a position moved by a predetermined value from a fully open position in the opening mode, and (3) setting the actual throttle position at a position moved by a predetermined value from a fully closed position in the closing mode. - View Dependent Claims (2, 3, 4, 5)
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Specification