Auto-leveling system for vehicle headlamp
First Claim
1. An auto-leveling system for vehicle headlamp comprising:
- a headlamp an optical axis of which is tilted vertically to a vehicle body by driving an actuator;
a control unit for controlling a drive of the actuator;
a pitch angle sensing means for sensing a pitch angle of a vehicle; and
a headlamp lighting switch, whereby the control unit controls a drive of the actuator based on the pitch angle being sensed by the pitch angle sensing means such that the optical axis of the headlamp is always set to a predetermined tilted state with respect to a road surface when the headlamp lighting switch is in an ON state;
wherein the system has a daytime running light lighting deciding function, and the control unit controls the drive of the actuator so as to fix the optical axis of the headlamp at a frontal lower limit position when the headlamp lighting switch is in an OFF state and a daytime running light is turned on.
1 Assignment
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Accused Products
Abstract
A auto-leveling system for vehicle headlamp comprises a headlamp an optical axis L of which is tilted vertically by a drive of a motor, a control unit 16 for controlling the drive of the motor 10, a vehicle pitch angle sensing means 14, and a headlamp lighting switch 11, whereby the control unit 16 controls the drive of the motor 10 based on a sensed pitch angle such that the optical axis of the headlamp is always set to a predetermined tilted state with respect to a road surface when the headlamp lighting switch is in an ON state, wherein the system has a daytime running light lighting deciding function, and the control unit 16 controls the drive of the motor 10 so as to fix the optical axis L of the headlamp at a frontal lower limit position when the headlamp lighting switch 11 is in an OFF state and a daytime running light is turned on. Thus, the drive of the motor 10 in a daytime running is eliminated and a load applied to the motor 10 is reduced.
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Citations
6 Claims
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1. An auto-leveling system for vehicle headlamp comprising:
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a headlamp an optical axis of which is tilted vertically to a vehicle body by driving an actuator;
a control unit for controlling a drive of the actuator;
a pitch angle sensing means for sensing a pitch angle of a vehicle; and
a headlamp lighting switch, whereby the control unit controls a drive of the actuator based on the pitch angle being sensed by the pitch angle sensing means such that the optical axis of the headlamp is always set to a predetermined tilted state with respect to a road surface when the headlamp lighting switch is in an ON state;
wherein the system has a daytime running light lighting deciding function, and the control unit controls the drive of the actuator so as to fix the optical axis of the headlamp at a frontal lower limit position when the headlamp lighting switch is in an OFF state and a daytime running light is turned on. - View Dependent Claims (2, 3)
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4. An auto-leveling system for vehicle headlamp comprising:
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a headlamp an optical axis of which is tilted vertically to a vehicle body by driving an actuator;
a control unit for controlling a drive of the actuator;
a speed sensing means for sensing a speed of a vehicle;
a pitch angle sensing means for sensing a pitch angle of the vehicle; and
a headlamp lighting switch, whereby the control unit controls a drive of the actuator based on the pitch angle being sensed by the pitch angle sensing means independently of whether or not a posture of the vehicle is stabilized statically such that the optical axis of the headlamp is always set to a predetermined tilted state with respect to a road surface when the headlamp lighting switch is in an ON state;
wherein the system has a daytime running light lighting deciding function and is constructed to alternatively select a dynamic auto-leveling process, which executes a drive control of the actuator independently of whether or not the posture of the vehicle is stabilized statically, and a static auto-leveling process, which executes the drive control of the actuator as far as the posture of the vehicle is stabilized statically, or the like, as an auto-leveling process, and the control unit is constructed to select the dynamic auto-leveling process when the headlamp light switch is in an ON state, and select the static auto-leveling process when the headlamp light switch is in an OFF state and a daytime running light is turned on. - View Dependent Claims (5, 6)
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Specification