DORSTOP – Functional Principle

Three different functional ranges ensure that the DORSTOP can be optimized to each application situation:

In the non-lockingrange, the vehicle door can be easily moved back and forth at a low force level. The function of the DORSTOP piston is disabled in this range to facilitate opening and closing of the doors.

In the variable locking range, the door can be held open at any angle.

In the end range of the door opening angle, the door will slow down gently before reaching the end position. The variable locking function will also work in this range. Hydraulic end position damping will significantly reduce the load on the vehicle structure when the door is stopped, and prevent the door from accidentally swinging back from the end position.

1. Locking Function

In the neutral position, the pressure on both piston sides is practically identical. All valves are closed. The DORSTOP is locked. The door will be held in place safely.

2. Adjustment Function

External force application will increase the oil pressure before the valve. If this force exceeds the locking force of the device, the valve will open and let the oil flow to the other side of the piston. Then moving the door will require very little force. Since the dynamic oil pressure before the piston package is applied to a large surface of the valve, it will remain open. When the door is pushed open, the separating piston in the piston package will also extend.

3. End-Damping

Towards the end of the stroke, the piston moves into a damper cup. The oil before the piston must pass a small opening of the damper cup, which compressing and reducing the oil’s flow rate. This will result in the door motion being hydraulically braked.