Vehicular steering control apparatus
First Claim
1. A vehicular steering control apparatus, comprising:
- a steering input unit that is operated by a driver;
an automatic steering unit that automatically steers steerable wheels relative to the steering input unit; and
a steering assist force generation unit that generates a steering assist force, wherein steering control performed by at least one of the automatic steering unit and the steering assist force generation unit is so changed as to damp fluctuations in an operational force required of the driver which result from inversion of an actual turning direction of the steerable wheels, if it is determined that the turning direction is inverted through the automatic steering.
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Accused Products
Abstract
The feeling of steering is improved by reducing the influence of the inversion of the direction of application of a frictional force in a steering system on a steering counterforce. A target relative rotational angle of a turning angle change unit for allowing a vehicle to make a turn stably is calculated, and front wheels of the vehicle are turned through automatic steering on the basis of the target relative rotational angle. However, if it is determined that a time zone in which the direction of application of a frictional force in a steering system is inverted as a result of the inversion of the turning direction of the front wheels that are turned through automatic steering has been entered, an inverted-state control map is set, and an assist steering torque is calculated from the map. Thus, in comparison with a normal state, the ratio of the assist steering torque to a steering torque is increased, so that the assist steering torque is increased.
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Citations
19 Claims
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1. A vehicular steering control apparatus, comprising:
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a steering input unit that is operated by a driver;
an automatic steering unit that automatically steers steerable wheels relative to the steering input unit; and
a steering assist force generation unit that generates a steering assist force, wherein steering control performed by at least one of the automatic steering unit and the steering assist force generation unit is so changed as to damp fluctuations in an operational force required of the driver which result from inversion of an actual turning direction of the steerable wheels, if it is determined that the turning direction is inverted through the automatic steering. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A vehicular steering control apparatus, comprising:
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a steering input unit that is operated by a driver;
an automatic steering unit that automatically steers steerable wheels relative to the steering input unit;
a steering assist force generation unit that generates a steering assist force; and
a controller that determines whether or not an actual turning direction is inverted through the automatic steering, and changes steering control performed by at least one of the automatic steering unit and the steering assist force generation unit in such a manner as to damp fluctuations in an operational force required of the driver which result from inversion of the turning direction of the steerable wheels, if it is determined that the turning direction is inverted through the automatic steering. - View Dependent Claims (17, 18, 19)
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Specification