| 摘要 |
A system for disabling a stolen motor vehicle including a control device and a trigger device. The stolen motor vehicle has a master cylinder housing brake fluid and coupled to brakes by brake lines. The control device controls the flow of brake fluid between the master cylinder and the brakes, initially allowing bidirectional flow of brake fluid. The trigger device triggers the control device to restrict the flow of brake fluid to one direction in response to initiation of the system, tilting of the stolen motor vehicle forward at an angle with respect to ground equal to or greater than a preset angle, and application of the brakes. The trigger device includes a first switch, an operator switch, a motion activated switch, and a brake switch. The first switch is coupled in series between the control device and ground and is initially open. The first switch is operable to activate the control device to restrict the flow of brake fluid to one direction when closed. The operator switch, the motion activated switch, and the brake switch are all initially open and are connected in series between a power source and the first switch. The operator switch, the motion activated switch, and the brake switch close the first switch when they are all closed. The control device includes a solenoid device which is coupled to the power source and has a first position which permits bidirectional flow between the master cylinder and the brakes and a second position which only permits one-way flow to the front brakes. The solenoid device is initially in the first position and is triggered to move to the second position when the first switch closes. |
