Automatic opening/closing device of vehicular opening/closing body and controlling method
First Claim
Patent Images
1. An automatic opening/closing device of a vehicular opening/closing body, comprising:
- a motor driven to open/close the opening/closing body, the motor halting a closing operation of the opening/closing body or inverting the closing operation to an opening operation when it is decided that a foreign object is jammed; and
a controller for performing feedback control for a rotary pulse cycle of the motor to increase/decrease a duty in order to open/close the opening/closing body at a target speed and for determining, as jamming, a state where the rotary pulse cycle is not definitely decided before a jamming determining time comes, the jamming determining time being lowered much more than a standard pulse time corresponding to a target speed, wherein the duty is increased step by step until the rotary pulse cycle is definitely decided at a stage before the jamming determining time comes.
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Abstract
An automatic opening/closing device of a vehicular opening/closing body, which gradually increases a duty until a rotary pulse cycle is definitely decided at a stage before a jamming determining time comes, thus making it possible to move a backdoor even if a resistance due to self-weight of the backdoor is generated and to prevent a malfunction in which the backdoor is halted or an operation thereof is inverted even under a state where the backdoor does not jam any foreign object.
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Citations
4 Claims
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1. An automatic opening/closing device of a vehicular opening/closing body, comprising:
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a motor driven to open/close the opening/closing body, the motor halting a closing operation of the opening/closing body or inverting the closing operation to an opening operation when it is decided that a foreign object is jammed; and
a controller for performing feedback control for a rotary pulse cycle of the motor to increase/decrease a duty in order to open/close the opening/closing body at a target speed and for determining, as jamming, a state where the rotary pulse cycle is not definitely decided before a jamming determining time comes, the jamming determining time being lowered much more than a standard pulse time corresponding to a target speed, wherein the duty is increased step by step until the rotary pulse cycle is definitely decided at a stage before the jamming determining time comes. - View Dependent Claims (2, 3)
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4. A controlling method for a closing operation of a vehicular opening/closing body, the closing operation being performed by an automatic opening/closing device provided with a motor for driving the opening/closing body, the controlling method comprising:
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detecting a rotary pulse cycle from the motor;
judging whether the rotary pulse cycle is definitely decided;
comparing the rotary pulse cycle with a specified jamming determining time when the rotary pulse cycle is not definitely decided;
comparing a specified pulse lowering determining time with the rotary pulse cycle when the rotary pulse cycle is less than the jamming determining time; and
increasing a duty step by step until the rotary pulse cycle is definitely decided when the rotary pulse cycle is less than the pulse lowering determining time.
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Specification