Abstract: A linear actuator (10) for use in a modular assembly of such actuators comprises an actuator body (11), a shaft (12) guided by the body to be displaceable relative thereto in the sense of tlte longitudinal axis (13) of the shaft and a drive motor enclosed in the body and operable to axially displace the shaft relative to the body in two mutually opposite directions. The body has two mutually opposite sides (15a, 15b) respectively lying in two substantial parallel spaced-apart planes, which each represent a reference plane for positioning the body side-by-side with the body of another such actuator, and a further side (17b) connecting the two mutually opposite sides and stepped to form a projection (18) receiving the shaft (12) with the axis (13) parallel to the two planes and a rebate (19) beside the projection to permit the body to interlock with the body of another such actuator at that further side.

Abstract: A dual-fuel engine has a primary fuel supply and a secondary fuel supply, the primary and secondary fuels being arranged in use to mix with each other and with air for combustion in one or more cylinders of the engine. The supply of both the primary and secondary fuels is arranged to be actively managed in accordance with a desired engine performance characteristic by an electronic controller. In one arrangement the supply of a primary fuel is arranged to be actively reduced when a secondary fuel is supplied to the engine.

Abstract: A dual-fuel engine has a primary fuel supply and a secondary fuel supply, the primary and secondary fuels being arranged in use to mix with each other and with air for combustion in one or more cylinders of the engine. The supply of both the primary and secondary fuels is arranged to be actively managed in accordance with a desired engine performance characteristic by an electronic controller. In one arrangement the supply of a primary fuel is arranged to be actively reduced when a secondary fuel is supplied to the engine.

Abstract: Wireless remote control system for engine piston with in-piston circuit (50) and an external processing unit mounted on the exterior of the crank case (51). A carrier signal generated in the external processing unit is fed to a primary coil (P) located within the crank case and the secondary coil (S), loosely coupled to coil (P) and tuned for resonance therewith is located in the skirt of the piston. The secondary coil picks up a carrier signal from the primary coil and the carrier signal is rectified, smoothed and regulated to provide DC power to a micro controller in the piston circuit. The micro controller may use data from a number of sensors to modulate the signal in the secondary coil, which modulation is picked up by the primary coil and thus sensor data is transmitted to the external processing unit where it is filtered and decoded.

Abstract: Wireless remote control system for engine piston with in-piston circuit (50) and an external processing unit mounted on the exterior of the crank case (51). A carrier signal generated in the external processing unit is fed to a primary coil (P) located within the crank case and the secondary coil (S), loosely coupled to coil (P) and tuned for resonance therewith is located in the skirt of the piston. The secondary coil picks up a carrier signal from the primary coil and the carrier signal is rectified, smoothed and regulated to provide DC power to a micro controller in the piston circuit. The micro controller may use data from a number of sensors to modulate the signal in the secondary coil, which modulation is picked up by the primary coil and thus sensor data is transmitted to the external processing unit where it is filtered and decoded.

Abstract: Wireless remote control system for engine piston with in-piston circuit (50) and an external processing unit mounted on the exterior of the crank case (51). A carrier signal generated in the external processing unit is fed to a primary coil (P) located within the crank case and the secondary coil (S), loosely coupled to coil (P) and tuned for resonance therewith is located in the skirt of the piston. The secondary coil picks up a carrier signal from the primary coil and the carrier signal is rectified, smoothed and regulated to provide DC power to a micro controller in the piston circuit. The micro controller may use data from a number of sensors to modulate the signal in the secondary coil, which modulation is picked up by the primary coil and thus sensor data is transmitted to the external processing unit where it is filtered and decoded.