Patent ID: 7484482
Filing Date: 2009-02-03
Classification: F01L,F02B,F02D,F02F,Y02T

Abstract:
1. A valve assembly suitable for use with an exhaust port of a two-stroke internal combustion engine, the valve assembly comprising: a valve actuator, the valve actuator including: a valve operatively connected to the actuator, the valve being movable to a first position when a first pressure is supplied to the pressure chamber by the at least one pressure source, the valve being movable to a second position when a second pressure is supplied to the pressure chamber by the at least one pressure source, the valve being biased towards a third position, the valve being movable to the third position when a third pressure is supplied to the pressure chamber by the at least one pressure source, the third pressure being insufficient to overcome the bias, the third position being intermediate the first position and the second position; and a spring biasing the valve towards the third position.