Abstract: A method of displacing a pumping assembly. In a first step, a first current is applied in a first direction through a coil assembly to displace a drive assembly from an initial position to cause a first pumping motion. Then, the drive assembly is returned to the initial position to cause a second pumping motion. At some point nearing the end of the second pumping motion, a second current is applied in the first direction through the coil assembly to decelerate the drive assembly before it reaches the initial position. A third current may be applied in a second direction through the coil assembly to cause or assist a return of the drive assembly to the initial position. An apparatus capable of carrying out the method is also disclosed.

Abstract: An apparatus and method for silencing an engine are disclosed. A silencer is disposed about a motor and is molded to substantially match at least one of a contour of the cover and a contour of the motor to silence noise transmitted from the motor.

Abstract: An air intake assembly having a bypass and method of operating an engine are disclosed. The air intake assembly has a first opening having a throttle plate disposed in the opening and configured to control the passage of combustion gas through the opening. A second opening is vented to atmosphere and configured to pass combustion gas through the second opening.

Abstract: A method of displacing a pumping assembly. In a first step, a first current is applied in a first direction through a coil assembly to displace a drive assembly from an initial position to cause a first pumping motion. Then, the drive assembly is returned to the initial position to cause a second pumping motion. At some point nearing the end of the second pumping motion, a second current is applied in the first direction through the coil assembly to decelerate the drive assembly before it reaches the initial position. A third current may be applied in a second direction through the coil assembly to cause or assist a return of the drive assembly to the initial position. An apparatus capable of carrying out the method is also disclosed.

Abstract: An air intake silencer for an internal combustion engine is disclosed. A path extends through the air intake silencer to provide combustion air to an internal combustion engine. The air intake silencer has a base constructed to be attached to the internal combustion engine with an opening extending therethrough which allows passage of combustion air into an air intake of the internal combustion engine. A cover is constructed to attach to the base and enclose a flow path therebetween. An inside surface of a cover includes a plurality of cellular recesses formed therein. Such a construction minimizes the transmission of combustion related noise beyond the air intake silencer.