Forum Discussion
jimh406
Sep 10, 2020Explorer III
StirCrazy wrote:
All new turbo diesels have them in one form or another and have had them for quite a few years. weather it is by use of a varable vane turbo or a true exhaust brake, no gas engine has close to the engine braking power of the moderen disels.
Diesel exhaust brakes duplicate engine braking that you get automatically in a 4 stroke engine with the throttle shuts off. Diesels have high compression and are fuel injected you need an exhaust brake to stop release the pressure in the engine and stop the combustion.
The only difference in how well they stop a vehicle is the compression of each engine and the gearing of each vehicle.
Most gasoline engines have had tow/haul/overdrive buttons since the early 90s. They do a very good job at slowing down the vehicle with correct gearing for loads that are being carried.
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