Every diesel truck owner wants an engine brake on their rig. That is if they don’t already have one. They help slow your pickup without cooking the brakes. But how do they work? And why don’t pickup ...

In any automotive braking system, the linchpin factor is pressure. When you press on the brake pedal in your car, for instance, pressurized brake fluid is distributed to the pistons in wheels, which ...

Fleet managers should have a good understanding of engine brakes and how they are properly used. How often do you hear drivers complaining about weak engine brakes? Some drivers will say the engine ...

Since this Cummins doesn’t have a throttle valve on the intake (like most gasoline engines), there is little engine braking or negative torque created by the crankshaft. This is because the ...

Ever had this happen? You're flat-towing your 4x4 through the mountains and there's a particularly long downgrade up ahead. Maybe your brakes are already a little hot, the pedal is a bit spongy, and ...

As cities nationwide move to ban noise from engine compression brakes, some of the more successful and common-sense efforts go to the source of the problem instead. States that pay attention to ...

Tenneco Automotive has introduced the Walker NoiseBraker, a truck muffler designed to quiet heavy-duty vehicle exhaust and engine-brake noise, while increasing engine efficiency. At the heart of the ...

We tested our X12 in a Cascadia daycab on Interstate and two-lane highways in Western New York, near Cummins’ Jamestown plant. Photos: Jim Park Cummins’ new X12 engine is slated to hit the street ...