A feature that makes navigating downhill grades and mountainous terrain easier and much safer than the vehicle’s conventional braking system is an exhaust brake.
The exhaust brake unit works by cutting off the exhaust flow from the engine through the closure of a high temperature resistant, stainless steel, butterfly valve. The valve is engaged electrically, by air or vacuum to close off the exhaust flow causing increased backpressure in the engine. This backpressure provides the retarding horsepower to slow the vehicle down on even the steepest descents.
Once engaged, by a toggle switch conveniently mounted on the dashboard, or wired through the Allison computer the brake is basically automatic. Backpressure maintained by a regulated orifice. The brake releases as soon as either the throttle is applied, or the switch is flipped off.
BD`s exclusive Variable Orifice design out retards any other brake on the market through out the engine RPM.
New Mid Range Applications!
Mid-range trucks are becoming a fast seller in a market where pick-up trucks cannot handle the weight and big rigs are overkill. What is making these mid-range trucks so popular is that even a pick-up truck driver can get behind the wheels of these “mini” rigs and feel confident that they have the power and capacity to handle the heavy loads. As with pick-ups, these mid-range trucks also require help when handling all that weight.
BD has introduced new brake kits for two of the newer mid-range trucks, the GMC TopKick C4500/C5500 with the 6.6L Duramax engine and Navistar trucks with the VT365 engine. The brake kit for the GMC TopKit is also available with a heavy duty electric air compressor for those trucks without on board air for the service brakes.