Abstract: An exhaust muffler for an internal combustion engine includes a housing. A plurality of partitions are disposed within the housing, defining a plurality of chambers. An inlet pipe and an outlet pipe are also disposed within the housing and both the inlet and outlet pipes include a perforated region. The perforated region permits fluid communication between the inlet pipe, outlet pipe and the plurality of chambers. To attenuate engine noise, the perforated regions of the inlet and outlet pipes are positioned at opposite ends of the housing, forcing the exhaust gas to pass through each of the plurality of partitions and chambers, thereby damping the sound waves with minimum effect on engine back pressure levels. Alternatively, the perforated regions of the inlet and outlet pipes may be aligned in a cross-flow chamber.

Abstract: An exhaust muffler for an internal combustion engine includes a housing. A plurality of partitions are disposed within the housing, defining a plurality of chambers. An inlet pipe and an outlet pipe are also disposed within the housing and both the inlet and outlet pipes include a perforated region. The perforated region permits fluid communication between the inlet pipe, outlet pipe and the plurality of chambers. To attenuate engine noise, the perforated regions of the inlet and outlet pipes are positioned at opposite ends of the housing, forcing the exhaust gas to pass through each of the plurality of partitions and chambers, thereby damping the sound waves with minimum effect on engine back pressure levels. Alternatively, the perforated regions of the inlet and outlet pipes may be aligned in a cross-flow chamber.

Abstract: A hydraulic system with a suppressor unit is provided. The hydraulic system includes a reservoir and a hydraulic pump. The hydraulic pump supplies the fluid at a predefined pressure. The hydraulic system includes a hydraulic actuator connected to the hydraulic pump. The hydraulic system also includes a suppressor unit disposed between the hydraulic pump and the hydraulic actuator. The suppressor includes a housing member and a resilient member. The housing member includes a wall member having an inner wall surface and an outer wall surface. The resilient member is disposed within the wall member. The resilient member includes a body having an inner surface and an outer surface. The inner surface defines a passage for fluid flow therethrough. The outer surface includes at least one protrusion having an end surface. The end surface abuts to the inner wall surface of the housing member.