Vehicle slip control apparatus
First Claim
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1. In a vehicle slip control apparatus capable of preventing the driving wheel from being slipped or spinned excessively on a road surface by controlling a torque transmitted to the driving wheel, the slip control apparatus comprising:
- output torque adjusting means for adjusting the output torque of a power source functioning as a source of the output of the torque;
braking force adjusting means for adjusting a braking force of the brake for a driving wheel;
slip detecting means for detecting slippage of the driving wheel on a road surface; and
slip controlling means for carrying out the slip control by controlling said output torque adjusting means and said braking force adjusting means in response to an output from said slip detecting means, thereby reducing the output torque of said power source without using a braking force of the driving wheel when the degree of slippage of the driving wheel is small, and thereby providing the driving wheel with the braking force, in addition to the reduction in the output torque of the power source, when the degree of slippage of the driving wheel is large.
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Abstract
The vehicle slip control apparatus is designed so as to enable the slip control to be done by causing the output torque of the engine to be reduced and operating the brake when an amount of a slip or spinning of the driving wheels is large, on the one hand, and only by causing the output torque of the engine to be reduced without using the brake when an amount of the slip or spinning of the driving wheels is small.
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Citations
20 Claims
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1. In a vehicle slip control apparatus capable of preventing the driving wheel from being slipped or spinned excessively on a road surface by controlling a torque transmitted to the driving wheel, the slip control apparatus comprising:
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output torque adjusting means for adjusting the output torque of a power source functioning as a source of the output of the torque; braking force adjusting means for adjusting a braking force of the brake for a driving wheel; slip detecting means for detecting slippage of the driving wheel on a road surface; and slip controlling means for carrying out the slip control by controlling said output torque adjusting means and said braking force adjusting means in response to an output from said slip detecting means, thereby reducing the output torque of said power source without using a braking force of the driving wheel when the degree of slippage of the driving wheel is small, and thereby providing the driving wheel with the braking force, in addition to the reduction in the output torque of the power source, when the degree of slippage of the driving wheel is large. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. In a vehicle slip control apparatus designed to prevent the driving wheel from being slipped or spinned excessively on a road surface by controlling the output of a torque to be transmitted to the driving wheel from a power-plant system including at least an engine, said slip control comprising:
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torque adjusting means for adjusting the output of the torque of said power-plant system; slip detecting means for detecting slippage of the driving wheel on a road surface; feedback control means for controlling said torque adjusting means by way of the feedback control in response to a signal from said slip detecting means so as to cause the degree of slippage of the driving wheel to reach a target value; slip reduction detecting means for detecting the reduction of the degree of slippage of the driving wheel from a large amount to said target value; and recovery control means for controlling said torque adjusting means, by way of an open loop control, by increasing said output torque in response to a signal from said slip reduction detecting means, in place of said feedback control, before the degree of slippage of the driving wheel reaches a target value, when the slippage of the driving wheel is being reduced from a large amount to said target value. - View Dependent Claims (14, 15, 16, 17)
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18. In a vehicle slip control apparatus designed to prevent the driving wheel from being slipped or spinned excessively on a road surface by controlling a torque transmitted to the driving wheel, said slip control apparatus comprising:
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output torque adjusting means for adjusting the output of a torque of a power source functioning as a source of the output of the torque; braking force adjusting means for adjusting a braking force of a brake for the driving wheel; slip detecting means for detecting slippage of the driving wheel on a road surface; power source slip controlling means for controlling said output torque adjusting means by way of a feedback control in response to an output from said slip detecting means so as to cause the degree of slippage of the driving wheel to become a first target value; brake slip controlling means for controlling said braking force adjusting means in response to an output from said slip detecting means so as to cause the degree of slippage of the driving wheel to become a second target value larger than said first target value; slip reduction detecting means for detecting the reduction in the degree of slippage of the driving wheel from a large amount thereof to each of said target value; and recovery control means for controlling said torque adjusting means, by way of an open loop control, by increasing said output torque in response to an output from said slip reduction detecting means before the degree of slippage of the driving wheel reaches at least said first target value, when the slippage of the driving wheel is being reduced from a large amount to each of said target values.
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19. In a vehicle slip control apparatus designed to prevent the driving wheel from being slipped or spinned excessively on a road surface by controlling a torque transmitted to the driving wheel, said slip control apparatus comprising:
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left slip detecting means for detecting slippage of the left driving wheel on a road surface; right slip detecting means for detecting slippage of the right driving wheel on a road surface; selecting means for selecting either the magnitude of slippage from said left slip detecting means or the magnitude of slippage from said right slip detecting means on the basis of a predetermined condition; left braking force adjusting means for adjusting a braking force against the left driving wheel; right braking force adjusting means for adjusting a braking force against the right driving wheel; a power source to be used in common for the left and right driving wheels; output torque adjusting means for adjusting the output of a torque of said power source; engine slip controlling means for controlling said output torque adjusting means in response to an output from said selecting means so as to cause the degree of slippage of the driving wheel selected by the selecting means to become a first target value by controlling said torque adjusting means; left brake slip controlling means for controlling said left braking force adjusting means in response to an output from said left slip detecting means sos as to cause the degree of slippage of the left driving wheel to become a second target value larger than said first target value; and right brake slip controlling means for controlling said right braking force adjusting means in response to an output from said right slip detecting means so as to cause the degree of slippage of the right driving wheel to become said second target value. - View Dependent Claims (20)
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Specification