Immobilizer arrangement for a motor vehicle, motor vehicle and method for actuating an immobilizer arrangement

A method for actuating an immobilizer arrangement comprising:

• providing an immobilizer arrangement that comprises:
• a motor configured to actuate a brake;
• a brake control configured to operate the motor in an engaging direction and a disengaging direction that is opposite the engaging direction, the brake control configured to reverse an actuating voltage across the motor to cause oppositely directed actuations of the motor in the engaging direction and the disengaging direction;
• an immobilizer control operable to selectively activate and deactivate an immobilizer, wherein the brake serves as the immobilizer to immobilize the vehicle when the immobilizer is activated, the immobilizer control configured to receive an authorization for deactivating the immobilizer from a user identification device;
• and
• a filter circuit that electrically connects the motor to the brake control and the immobilizer control, the filter circuit including a first current path and a second current path, the first current path and the second current path electrically connected to the motor;
• the first current path including a one-way element that conducts current in a single direction;
• the second current path including a switch that is electrically connected in-parallel to the one-way element;
• the switch being closed when the immobilizer is deactivated, the switch being open when the immobilizer is activated;
• the filter circuit, when the immobilizer is deactivated, allowing current to flow via the first path to operate the motor in the engaging direction and, alternatively, allowing current to flow via the second path to operate the motor in the disengaging direction;
• and
• the filter circuit, when the immobilizer is activated, allowing current to flow via the first path to operate the motor in the engaging direction and blocking current flow via the first path to prevent actuation of the motor in the disengaging direction;
• opening the switch to activate the immobilizer and to block current flow via the first path to prevent actuation of the motor in the disengaging direction;
• and
• closing the switch to deactivate the immobilizer and to allow current to flow via the first path to operate the motor in the engaging direction and, alternatively, to allow current to flow via the second path to operate the motor in the disengaging direction.

An immobilizer arrangement for a motor vehicle comprising:

• an actuator configured to actuate a brake;
• a brake control configured to operate the actuator in an engaging direction and a disengaging direction that is opposite the engaging direction, the brake control configured to reverse an actuating voltage across the actuator to cause oppositely directed actuations of the actuator in the engaging direction and the disengaging direction;
• an immobilizer control operable to selectively activate and deactivate an immobilizer, wherein the brake serves as the immobilizer to immobilize the vehicle when the immobilizer is activated, the immobilizer control configured to receive an authorization for deactivating the immobilizer from a user identification device;
• and
• a filter circuit that electrically connects the actuator to the brake control and the immobilizer control, the filter circuit including a first current path and a second current path, the first current path and the second current path electrically connected to the actuator;
• the first current path including a one-way element that conducts current in a single direction;
• the second current path including a switch that is electrically connected in-parallel to the one-way element;
• the switch being closed when the immobilizer is deactivated, the switch being open when the immobilizer is activated;
• the filter circuit, when the immobilizer is deactivated, allowing current to flow via the first path to operate the actuator in the engaging direction and, alternatively, allowing current to flow via the second path to operate the actuator in the disengaging direction;
• and
• the filter circuit, when the immobilizer is activated, allowing current to flow via the first path to operate the actuator in the engaging direction and blocking current flow via the first path to prevent actuation of the actuator in the disengaging direction.