Circuit for control of power windows, sun roofs, or door locks in motor vehicles
First Claim
1. A circuit for control of power accessories in motor vehicles with an electromechanical drive arrangement and the circuit switches into an emergency operation after recognition of a failure, the circuit comprising:
- a power driver configured to supply current to the electromechanical drive arrangement;
at least one connection to the power driver;
an operating switch configured to be operated by a user in an emergency operation; and
a switching element, such that the power driver can be actuated in an emergency operation, at least, via the operating switch;
wherein the at least one connection has an input level defined by a logical AND-operation of states of the operating switch and the switching element.
1 Assignment
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Accused Products
Abstract
A circuit and a process are used to control operation of an electromagnetic drive arrangement for power window lifters, sun roofs, or door locks of a motor vehicle. After recognition of a failure of functions or parts thereof or electrical or electronic components, emergency operation is initiated. The operation of electromagnetic drive arrangement is enabled by a switching element, and the control level for the control of the switching element is verified by the running of a safety routine before possible emergency operation.
68 Citations
18 Claims
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1. A circuit for control of power accessories in motor vehicles with an electromechanical drive arrangement and the circuit switches into an emergency operation after recognition of a failure, the circuit comprising:
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a power driver configured to supply current to the electromechanical drive arrangement;
at least one connection to the power driver;
an operating switch configured to be operated by a user in an emergency operation; and
a switching element, such that the power driver can be actuated in an emergency operation, at least, via the operating switch;
wherein the at least one connection has an input level defined by a logical AND-operation of states of the operating switch and the switching element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
an additional switching element connected in parallel with the switching element; and
an additional static memory storing an additional control level to control the additional switching element and having an output connected to the additional switching element.
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17. The circuit of claim 1, further comprising:
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a microcontroller;
wherein the electromechanical drive arrangement is switchable from a CLOSE direction to an OPEN direction by means of the operating switch, in that the drive arrangement is switched by the microcontroller without current for a minimal period of time between closing and opening.
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18. The circuit of claim 1, further comprising:
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a microcontroller;
a control unit; and
an automatic switching element;
wherein the switching element is connected to a supply voltage and to the power driver, the operating switch is connected to ground, to the power driver, via a pull-up resistor to the supply voltage and via a lowpass filter for debouncing, to the microcontroller, and wherein the automatic switching element is connected in parallel with the operating switch, in that the automatic switching element is connected with the ground and with the power driver, and the automatic switching element and the switching element are controllable by the microcontroller via a serial connection using a control level transmitted via the serial connection which is verifiable by the control unit.
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Specification