| 摘要 |
The invention relates to a brake assist device comprising an intermediate spring (8) combined with a compression thrust bearing (81), limiting compression to a force greater than the break pedal reaction under normal operating conditions. The spring (8) and its thrust bearing (81) are disposed between the plunger piston (2) and the assist piston (5) so that the spring (8) transmits the thrust from the assist piston (5) to the plunger piston (2) pulling on the brake pedal under normal braking conditions. The assist piston (5) pushes the plunger piston (2) by means of the compression thrust bearing (81) when the reaction from the plunger piston (2) exceeds the compression threshold. Contact between the assist piston and the thrust bearing (5) is detected by a contact detector (9). |
