Vehicle door mirror with pulse modulation control
AssigneeIchikoh Industries, Ltd.
InventorsHiroyasu Onuki, Takashi Ogawa, Hajime Yagi
Life of this patent
Estimating the term…
Abstract
A vehicle door mirror is configured to be mounted on outside of a vehicle in a retractable manner from a set position to a retracted position. When moving to the set position or the retracted position, the vehicle door mirror is moved at a first speed from a start position to a position right before a stop position, and is further moved from the position right before the stop position to the stop position at a second speed that is slower than the first speed.
Claims8
A vehicle door mirror configured to be mounted on outside of a vehicle in a retractable manner from a set position to a retracted position, wherein
- when moving to the set position or the retracted position, the vehicle door mirror is moved at a first speed from a start position to a position right before a stop position, and is further moved from the position right before the stop position to the stop position at a second speed that is lower than the first speed,
- wherein
- the vehicle door mirror is driven by a motor, and
- when a rotational speed of the motor is lower than a predetermined critical speed, the motor is driven under a pulse-width-modulation control, and
- when the rotational speed of the motor is higher than the predetermined critical speed, the motor is driven under a pulse-amplitude-modulation control.
A vehicle door mirror configured to be mounted on outside of a vehicle in a retractable manner from a set position to a retracted position, wherein when moving to the set position or the retracted position, the vehicle door mirror is moved at a first speed from a start position to a position right before a stop position, and is further moved from the position right before the stop position to the stop position at a second speed that is lower than the first speed, wherein the second speed is gradually reduced to zero from the position right before the stop position to the stop position, wherein the vehicle door mirror is driven by a motor, and when stopping a movement of the vehicle door mirror, the motor is driven at a predetermined tightening speed required for pivoting the vehicle door mirror up to a predetermined stop position such that the motor has a predetermined tightening torque required for causing the door mirror to pivot up to the predetermined stop position, and wherein when a rotational speed of the motor is lower than a predetermined critical speed, the motor is driver under a pulse-width-modulation control, and when the rotational speed of the motor is higher than the predetermined critical speed, the motor is driven under a pulse-amplitude-modulation control.
A system comprising:
- a vehicle door mirror configured to be mounted on outside of a vehicle in a retractable manner from a set position to a retracted position;
- and a controller configured to control movement of the vehicle door mirror such that when moving to the set position or the retracted position, the vehicle door mirror is moved at a first speed from a start position to a position right before a stop position, and is further moved from the position right before the stop position to the stop position at a second speed that is lower than the first speed, wherein the second speed is gradually reduced to zero from the
- position right before the stop position to the stop position, wherein the vehicle door mirror is driven by a motor, and when stopping a movement of the vehicle door mirror, the motor is driven at a predetermined tightening speed required for pivoting the vehicle door mirror up to a predetermined stop position such that the motor has a predetermined tightening torque required for causing the door mirror to pivot up to the predetermined stop position, and wherein
- when a rotational speed of the motor is lower than a predetermined critical speed, the motor is driver under a pulse-width-modulation control, and
- when the rotational speed of the motor is higher than the predetermined critical speed, the motor is driven under a pulse-amplitude-modulation control.
Dependencies are inferred from the claim text.