Abstract: At a low part load, and at idling of a vehicle machinery it is difficult to obtain a good fuel economy and acceptable emission rates. The amount of work for driving the compressor and the auxiliary apparatuses is considerable in a gas turbine, and in view of the conditions mentioned the combustor of the gas turbine is provided with two burners, of which one is dimensioned for a fuel quantity which merely corresponds to "spare-flame" operation. An auxiliary motor means is included in the machinery and keeps, together with the "spare-flame" operation. An auxiliary motor means is included in the machinery and keeps, together with the "spare-flame" burner, the main rotor of the gas turbine running at idling and part-load. The auxiliary motor may be an electric motor, a pressure fluid motor, or a combustion engine. The compressor is provided with means for throttling the flow of air, and a control device operates this throttling means so it is effective during "spare-flame" operation.

Abstract: The turbocharging plant of an internal combustion engine includes two turbines connected in series, of which one drives the compressor and the other transfer its output to the engine mechanically. The turbines and the compressor are mounted at the same side of the engine. The turbines can be designed to handle the gas in a radially inwards directed flow, the downstream turbine being mounted at a lower level than the upstream one, and receiving the gas by way of a double volute device. A third turbine desinged to handle the gas in a radially outwards directed flow may be interposed between the two first mentioned turbines.

Abstract: The turbocharging plant of an internal combustion engine includes two turbines connected in series, of which one drives the compressor and the other transfer its output to the engine mechanically. The turbines and the compressor are mounted at the same side of the engine. The turbines can be designed to handle the gas in a radially inwards directed flow, the downstream turbine being mounted at a lower level than the upstream one, and receiving the gas by way of a double volute device. A third turbine designed to handle the gas in a radially outwards directed flow may be interposed between the two first mentioned turbines.

Abstract: Outlet and inlet conduits of an internal combustion engine are united in, and carry a housing enclosing a rotor spool having one turbine and one compressor wheel. A cavity in the housing, the longitudinal axis of which is substantially parallel to a middle plane through the row of engine cylinders is adapted to receive the casing of the turbocharger, and may be designed in such a manner that the casing may be slid into the housing in the axial directions, without the housing having to be removed from the engine. Alternatively, the outlet and the inlet conduits may each, per se, be collected and form one half of the housing. The halves are brought together over the rotor spool, from both ends thereof. Resilient sealing members are preferably fitted between the two halves of the housing. A second exhaust gas turbine may be connected to the exhaust conduit from the supercharger, and may be adapted to drive at the power take-off shaft of the engine, or to drive some auxiliary.

Abstract: At a low part load, and at idling of a vehicle machinery it is difficult to obtain a good fuel economy and acceptable emission rates. The amount of work for driving the compressor and the auxiliary apparatuses is considerable in a gas turbine, and in view of the conditions mentioned the combustor of the gas turbine is provided with two burners, of which one is dimensioned for a fuel quantity which merely corresponds to "spare-flame" operation. An auxiliary motor is included in the machinery and keeps together with the "spare-flame" burner, the main rotor of the gas turbine running at idling and part-load. The auxiliary motor may be an electric motor.

Abstract: In order to improve the fuel economy of a vehicle engine, its cylinders are divided into two groups, which are operable independently of each other. The fuel system is adapted to supply either, or both groups with fuel. The crank shaft of one cylinder group is connectable to the power take-off shaft by means of conventional transmission and clutch means, while the crank shaft of the other cylinder group is connectable to the power take-off shaft by way of a transmission arrangement running in parallel to the row of cylinders, and comprising a shaft. The auxiliaries of the engine are mounted at the end of the engine remote from the power take-off shaft, and can be driven from either group of cylinders by way of the transmission arrangement.