Jacobs Vehicle Systems has developed a new engine braking technology, integrating the functionality of a standard Compression Release Brake into the ultra-small footprint of a valve bridge.


In response to the global engine suppliers' drive to minimize weight and space impact on the vehicle, Jacobs' engineers continue to focus on new ways of integrating the braking function into the valve train. The Bridge Brake represents the most recent extension of this effort.

This new lightweight design provides excellent retarding performance with zero valve train height increase. The Bridge Brake is especially suited for small-displacement engines and other applications where packaging space is at a premium.

This braking system, which was first launched on the Hyundai 10L engine, replaces the standard exhaust valve bridge with a braking valve bridge. Based on Jacobs' extensive Lost Motion know-how, the traditional valve train componentry is maintained, while allowing new complex valve motions to be achieved.

The US patent office recently granted comprehensive patent 7,905,208. This patent, along with other Jacobs Intellectual Property, covers this technology and its derivatives, allowing adaptation to various engine configurations.