초록 ▼

An electronic door lock/unlatch control in which the latching mechanisms latch mechanically upon door closing and include electric motor driven unlatching mechanisms but no mechanical locking apparatus. Locking is accomplished electronically for each door by a flip-flop which enables or disables a p

An electronic door lock/unlatch control in which the latching mechanisms latch mechanically upon door closing and include electric motor driven unlatching mechanisms but no mechanical locking apparatus. Locking is accomplished electronically for each door by a flip-flop which enables or disables a power MOSFET connected in series with the unlatch motor and unlatch switch for the door and an electric power source. The flip-flop for each door also controls lock status indicating lights. A rear door unlatch disable switch is included additionally in series with the rear door unlatch switch to allow operator disabling of the rear doors.

대표청구항 ▼

An electronic door lock/unlatch control for a motor vehicle having an electric power source, an ignition switch connected to the electric power source and at least one front door and one rear door, each of the front and rear doors having a mechanical latch mechanism adapted to latch the door automat

An electronic door lock/unlatch control for a motor vehicle having an electric power source, an ignition switch connected to the electric power source and at least one front door and one rear door, each of the front and rear doors having a mechanical latch mechanism adapted to latch the door automatically upon door closure and having a mechanical unlatch mechanism driven by an electric motor, when activated, to unlatch and partially open the door, the control comprising, in combination: a front door unlatch switch; a first transistor connected in series with the front door unlatch switch and electric motor of the front unlatch mechanism across the electric power source, the first transistor having a control electrode; a first bistable device having an output connected to the control electrode of the first transistor and being characterised by a first state effective to enable conduction of the first transistor upon closure of the front door unlatch switch and a second state in which conduction of the first transistor is prevented; a front door unlatch switch; a rear door unlatch switch; a second transistor connected in series with the rear door unlatch switch and the electric motor of the rear unlatch mechanism across the electric power source, the second transistor having a control electrode; a second bistable device having an output connected to the control electrode of the second transistor and being characterised by a first state effective to enable conduction of the second transistor upon closure of the rear door unlatch switch and a second state in which conduction of the second transistor is prevented; a front lock switch connected to the electric power source and the first and second bistable devices and effective, when closed, to put the first and second bistable devices in their second states to disable unlatching of the front and rear doors; a front unlock switch connected to the electric power source and the first and second bistable devices and effective, when closed, to put the first and second bistable devices in their first states to enable unlatching of the front and rear doors; a rear lock switch connected to the electric power source and the second bistable device and effective, when closed, to put the second bistable device in its second state to disable unlatching of the rear door; a rear unlock switch connected to the electric power source and the second bistable device and effective, when closed, to put the second bistable device in its first state to enable unlatching of the rear door; a rear unlatch disable switch connected in series with the second transistor, rear door unlatch switch and the electric motor of the rear unlatch mechanism across the electric power source, the rear unlatch disable switch being located within reach of a vehicle operator but out of reach of a passenger using the rear door and effective, when open, to prevent unlatching of the rear door; front lock and unlock indicating lights associated with the front door; rear lock and unlock indicating lights associated with the rear door; an indicating light drive circuit for each of the front lock, front unlock, rear lock and rear unlock indicating lights responsive to an enabling input and the output of the bistable device controlling enablement of the unlatching mechanism of the associated door to indicate the lock/unlock status thereof; a timing circuit effective to supply the enabling signal to the indicating light drive circuits while provided with an activating voltage input and for a predetermined time after removal of the activating voltage input; a door jamb switch connected to the electric power source and activated while the front door is open to provide the activating voltage to the timing circuit; and circuit means connected to the electric power source through the ignition switch to provide the activating voltage to the timing circuit, whereby the lock/unlock status of the locks is displayed while the ignition switch is closed, while the front door is open and for at least the predetermined time thereafter.