Auto up window with obstacle detection system
First Claim
1. A power closure system for a motor vehicle comprising:
- a closure;
a closure frame defining a seated position of the closure;
a control switch;
an electrical power source including a battery;
an electric motor with an output shaft drivingly connected to the closure and selectively electrically connected to the power source;
a first displacement sensor operably generating a signal indicative of one of closure movement and output shaft rotation;
a second displacement sensor operably generating a signal indicative of one of closure movement and output shaft rotation;
means for sensing a temperature;
means for sensing a voltage of the power source; and
a microprocessor electrically connected to the control switch, the electric motor, the first and second displacement sensors, the means for sensing a temperature and the means for sensing a voltage of the power source, and includingmeans for electrically connecting the motor with the power source responsive to a condition of the control switch;
means for converting signals from the displacement sensors into a predetermined number of closure positions;
means for converting temperature sensed to an electrical signal indicative of the temperature at one of the closure positions;
means for converting voltage sensed to an electrical signal of power source voltage at the one of the closure positions;
means for calculating a velocity of one of the closure and the motor as the closure approaches the one of the closure positions;
means for calculating a compensated velocity for the one of the closure positions using the calculated velocity and the voltage signal and the temperature signal; and
means for comparing the compensated velocity with a reference velocity for the one of the closure positions and electing to reverse the motor when the compensated velocity is less than the reference velocity.
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Accused Products
Abstract
A closure system for a motor vehicle includes a closure, a closure frame, an electric motor, a control switch, an electric power source, first and second displacement sensors, temperature sensor, voltage sensor of the power source and a microprocessor. The first and second displacement sensors each operably generate a signal indicative of the one of closure movement and output shaft rotation. The microprocessor is electrically connected to the control switch, the electric motor, the first and second displacement sensors, the temperature sensor and the voltage sensor of the power source. The microprocessor includes electrically connecting the motor with the power source responsive to a condition of the control switch. The microprocessor also has means for converting temperature sensed to an electrical signal indicative of the temperature. The microprocessor also includes converting voltage sensed to an electrical signal of power source voltage, and calculating a velocity of one of the closure and the motor between predetermined positions as indicated by transition signals from the displacement sensors as the closure is moved from an open position to the seated position. The microprocessor further includes calculating a compensated velocity by using the calculated velocity and the voltage signal and the temperature signal. The microprocessor yet further includes comparing the velocity with a reference velocity and electing to reverse the motor when the compensated velocity is less than the reference value.
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Citations
9 Claims
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1. A power closure system for a motor vehicle comprising:
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a closure; a closure frame defining a seated position of the closure; a control switch; an electrical power source including a battery; an electric motor with an output shaft drivingly connected to the closure and selectively electrically connected to the power source; a first displacement sensor operably generating a signal indicative of one of closure movement and output shaft rotation; a second displacement sensor operably generating a signal indicative of one of closure movement and output shaft rotation; means for sensing a temperature; means for sensing a voltage of the power source; and a microprocessor electrically connected to the control switch, the electric motor, the first and second displacement sensors, the means for sensing a temperature and the means for sensing a voltage of the power source, and including means for electrically connecting the motor with the power source responsive to a condition of the control switch; means for converting signals from the displacement sensors into a predetermined number of closure positions; means for converting temperature sensed to an electrical signal indicative of the temperature at one of the closure positions; means for converting voltage sensed to an electrical signal of power source voltage at the one of the closure positions; means for calculating a velocity of one of the closure and the motor as the closure approaches the one of the closure positions; means for calculating a compensated velocity for the one of the closure positions using the calculated velocity and the voltage signal and the temperature signal; and means for comparing the compensated velocity with a reference velocity for the one of the closure positions and electing to reverse the motor when the compensated velocity is less than the reference velocity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling closure movement in a motor vehicle employing an electric drive motor controlled by a microprocessor including:
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mounting a first displacement sensor in a first position relative to a shaft of the electric drive motor; mounting a second displacement sensor in a second position relative to the shaft of the electric drive motor; using the first displacement sensor and the second displacement sensor to provide an indication of closure direction and position; using the microprocessor to calculate a velocity of one of the closure and the motor at a predetermined closure position; sensing a temperature and converting the temperature sensed to an electrical signal indicative of the temperature at the predetermined closure position; sensing a voltage and converting the voltage sensed to an electrical signal of power source voltage at the predetermined closure position; using the microprocessor to calculate a temperature correction factor using the electrical signal indicative of temperature and a predetermined reference temperature; using the microprocessor to calculate a compensated velocity for the predetermined closure position by dividing the calculated velocity by the voltage signal and multiplying by the temperature correction factor; and comparing the compensated velocity with a stored reference velocity for the predetermined closure position and electing to reverse the motor when the compensated velocity is less than the reference velocity.
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Specification