Abstract: A system for an engine (101) comprises a heat recovery system and a gaseous fuel supply system. The heat recovery system comprises a first reservoir (104) for fluid, at least one evaporator (121) for transferring heat from an engine to the fluid, a vapour expander (129) for converting fluid vapour energy into motive power, and a condenser (134). The gaseous fuel supply system comprises a second reservoir (90) for liquefied gaseous fuel and a fuel evaporator (91) for expanding liquefied gaseous fuel into gaseous fuel for the engine. The condenser (134) is in thermal contact with the fuel evaporator (91).

Abstract: A waste heat recovery system (100) for an engine (101) comprises a fluid supply (104); one or more evaporators (120, 121) adapted to transfer waste heat from the engine (101) to fluid from the fluid supply (104) to heat the fluid to a superheated vapor; a condenser (134) having a condenser inlet (134?) in fluid communication with the one or more evaporators; and a pressure regulator (200) configured to limit the vapor pressure at the condenser inlet (134?).

Abstract: A communication system comprising a controller system, a master control means (2) and at least one slave control means (3), the controller system and the master control means (2) being connected via a multipole connection means (4), the master control means (2) being adapted to receive a multipole signal via the multipole connection means (4) and outputting an addressed signal to the at least one slave control means (3) via addressable connection means (7, 17). This application also discloses a method of controlling a plurality of fluid flow control means using an output means (40) comprising an actuation signal arrangement means (41, 41?) and an actuation means (42, 42?) associated with each fluid flow control means.

Abstract: An actuator assembly (1) comprises a body (2) in which works an actuating piston (7), a first piston (5) and at least one second piston (6), a chamber (26) containing a substantially incompressible fluid by which each of the first and second pistons (5, 6) acts on the actuating piston (7). The movement of the first piston (5) from a retracted position to an extended position acts via the fluid to cause the actuating piston (7) to move from a retracted position to an operational position, and subsequent movement of a second piston (6) from a retracted position to an extended position acts via the fluid to cause an actuation movement of the actuating piston (7).