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In response to CNHTC and other Chinese OEMs, "voice of the customer" (VOC), regarding performance needs and the subpar quality of China's local exhaust brakes, SJVS invented the CBP XB. The advanced technology, constant back pressure exhaust brake provides extra engine braking for the HOWO A7 truck.

CBP XB has a back pressure control system called “Seal Bar”. Jacobs uses a special spring to balance the back pressure via moving the seal bar. It can provide higher back pressure at low RPM and control the back pressure at high RPM, so it can provide 20% more power at low RPM than a fixed orifice exhaust brake (FOXB), and protect the engine via release the back pressure when the RPM is too high.

Our Story

Although the Jacobs Engine Brake has been on the market since 1961, the need for it was terrifyingly demonstrated to its inventor Clessie L. Cummins, some thirty years earlier. In August of 1931, himself, Ford Moyer, and Dave Evans driving a Cummins diesel powered Indiana truck from New York to Los Angeles...

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Featured Technology


ADT (Active Decompression Technology)

For Start-Up and Shutdown Engine Strategies When drivers expressed frustration with anti-idling regulations, Jacobs’ engineers developed a device to improve start-up and shutdown engine technology.

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