An Exhaust Brake Valve Assembly

摘要

An exhaust brake valve assembly for connecting into the exhaust system of an internal combustion engine, comprises an actuator for operating the valve, the actuator including a cylinder in which are fitted (a first piston 13 and a second piston 14. There is also provided first biasing means 7 which is located between said first and second piston 5 to bias said first piston 13 away from said second piston 14 and second biasing means 6 which biases said second piston 14 in the same direction as said first piston 13. An inlet 28 is provided on the opposite side of said first and second piston 5 to said biasing means for applying pressure to said first piston. The applied pressure initially causes the first piston 13 to move towards said second piston 14 and subsequently said first and second pistons to move together from a first connecting rod 12 interconnects said first piston with an exhaust brake valve slider.