Abstract: A multi-cylinder 2-stroke fuel injection engine of the crankcase compression type has a separate crank chamber associated with each cylinder and inlet, transfer and exhaust ports in each cylinder. The exhaust ports of the engine communicate with an exhaust manifold which communicates with the turbine of an exhaust gas driven scavenge compressor, and the impeller of the compressor communicates with an inlet manifold which communicates with the inlet ports of the engine so as to pressure charge each crank chamber and thus increase the mass of air subsequently pumped to the associated cylinder by way of its transfer port.

Abstract: This invention provides a differential pressure-activated control system having non-mechanical, remotely controllable, biasing means. The system comprises a differential pressure sensing means, having opposing first and second pressure sensing portions, a conduit between one portion of the sensing means and a system to be monitored and a second conduit means between a second portion of the pressure sensing means and the system to be monitored; the second conduit comprising in intermediate fluid flow pressure connection, a pressure regulator which limits the maximum pressure, in accordance with a desired predetermined pressure, conducted to the second portion of the pressure sensing means. Such pressure regulator can be remote from the system and from the pressure sensing means and is connected thereto only by non-moving, pressure-connecting means.

Abstract: The invention relates to a control device for a multiple cylinder-piston motor for operation with a gaseous fuel, said control device being connected to the gas conduit, leading from the throat of the venturi-tube in the air suction conduit to the evaporator pressure regulator, as well as to the vacuum conduit, leading from downstream the throttle in said air suction conduit to said evaporator-pressure regulator, said control device comprising a control valve provided with a control mechanism, said control valve being incorporated in said gas conduit and said control mechanism being incorporated in said vacuum conduit, the arrangement, on operation of said throttle from its closed position towards its open position, and reverse, allowing the said control valve to be automatically brought from a position for small gas passage to a position for considerable gas pressure, and reverse.

Abstract: An orifice and a valve to maintain the ratio of recirculated exhaust gas to engine intake air at an optimum level.

Abstract: The invention relates to a method and apparatus for improving the performance of back-to-back turbocompressor or turbopump systems, or, more generally, of internal-separation energy separators. A helicoidal or spiral baffle is used to impart simultaneously a positive prerotation to the flow which is to be de-energized and a negative prerotation to the flow which is to be energized.