![]() ![]() Note that since AP doesn't provide any diagrams for the internal, patented workings of their cylinder, the implementation details could vary. The secondary output is now directed to the brakes providing greater force. Once pressure increases, the changeover valve switches so that the output of the primary is directed to the reservoir and it moves freely. The primary output is directed to the brakes. When braking begins, the output of the secondary cylinder is vented back into the reservoir so it moves freely. The differential bore model looks very similar inside except the "primary" is larger than the "secondary", and both of the outputs are controlled by the external changeover valve. Unfortunately, Kokeln has long been out of business, taking. After searching around a bit more, we found that their used be a company called Kokeln Racing Products that sold a Porsche 944 Dual Master Kit. This provides hydraulic power for two circuits at the same time, like the front and rear brakes. So, we attempted to find a kit that could be purchased and used to run dual master cylinders. Here we see two chambers that are compressed by two plungers that connect to the same rod. Lets compare this with a typical master cylinder from a passenger vehicle: Furthermore, if you continue reading their description, the primary chamber isn't activated again until the driver completely releases pressure on the pedal to prevent the switchover from happening rapidly (in the middle of a corner for instance). Once the secondary chamber is activated, the large chamber is not under any pressure at all. The smaller chamber provides a greater mechanical advantage, and the smaller amount of fluid is fine because the brakes are already tight. Once the pressure rises (as the brake pads contact the disk and tighten up), the external valve changes from the primary (large) chamber to the secondary (small) chamber. Initially when the large cylinder is active and high pressure is not needed, a larger amount of fluid is pushed into the system. In hydraulics, the difference in cylinder size is what gives you a mechanical advantage. The master cylinder has two chambers, and one has a larger diameter than the other. The small cylinder with the blue cap is the "external changeover valve". Looking at the picture of the "pull type" part might help: ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |