Abstract: A power unit comprises a Diesel engine supercharged by a turbocompressor which has a turbine receiving the engine exhaust gases. A by-pass pipe conveys the air not absorbed by the engine from the compressor to the turbine with a pressure drop which is independent of the flow rate and increases with the compressor outlet pressure. An auxiliary combustion chamber upstream of the turbine receives the air which has travelled through the by-pass. A throttle is disposed in the path of the supercharging air to the engine and is automatically actuated so as to maintain the flow rate of air absorbed by the engine at a value below the flow rate supplied by the compressor under low load conditions.
April 23, 1976
Date of Patent:
March 14, 1978
Jean Melchior, Thierry Andre, Michel de Lambert DE Boisjean
Abstract: A power unit comprises an internal combustion compression ignited engine having variable-volume combustion chambers and supercharged by a turbocompressor having a turbine which receives the engine exhaust gases. A bypass pipe which is permanently open during operation of the engine returns the air not absorbed by the engine to the turbine with a pressure drop which, if appreciable, is independent of the flow rate and increases with the compressor outlet pressure. The power unit comprises a heat exchanger between the gas flow leaving the turbine and the air flow leaving the compressor. An air cooler is disposed in the path of the air travelling from the heat exchanger to the engine.
Abstract: A hydrogen generator provides hydrogen rich product gases which are mixed with the fuel being supplied to an internal combustion engine for the purpose of enabling a very lean mixture of that fuel to be used, whereby nitrous oxides emitted by the engine are minimized. The hydrogen generator contains a catalyst which must be heated to a pre-determined temperature before it can react properly. To simplify the process of heating up the catalyst at start-up time, either some of the energy produced by the engine such as engine exhaust gas, or electrical energy produced by the engine, or the engine exhaust gas may be used to heat up air which is then used to heat the catalyst.
Abstract: A power plant comprises an internal combustion engine, (Diesel engine), a compressor for supercharging the engine and a turbine for driving the compressor. The turbine is fed in parallel by the exhaust conduit of the engine and by a passage communicating with the compressor outlet. The passage is divided into two parallel arms. The first arm has a throttle. The second arm is connected to the primary zone of an auxiliary combustion chamber via orifices of a cross-section such that the pressure drop produced between the upstream and downstream ends of the orifices of the second arm is the same as the pressure drop produced between the upstream and downstream ends of the throttle of the first arm. The combustion chamber is fed by a fuel supply system entering the primary zone in the region of the turbulence produced in this zone by the arrival of air through the orifices, so that a complete and stable combustion is achieved in the auxiliary combustion chamber.
Abstract: The invention is concerned with an improvement in a turbocharger system for an internal combustion engine having an exhaust manifold and an intake manifold adjacent to the engine. The turbocharger system includes a turbine communicating with the exhaust manifold and driven by gases therefrom. The turbine drives a compressor and has an output which communicates with the intake manifold. A fuel burner chamber forms a part of the turbocharger system, said fuel burner chamber having an input for receiving compressed air, an output through which expanded gases pass and a spark igniter. The turbocharger system further includes means communicating the output of the compressor to the input of the fuel burner chamber, means communicating the output of the fuel burner chamber into and through the exhaust manifold, means for supplying a variable quantity of fuel from a fuel reservoir to said burner chamber and means responsive to intake manifold pressure to vary the quantity of fuel delivered to the burner.
Abstract: A method and apparatus for operating an internal combustion engine equipped with an exhaust gas turbo-supercharger and with a combustion chamber which supplies additional gas to the exhaust gas turbine; during idling of the internal combustion engine, the combustion chamber is operated at such partial output that with lowest possible fuel consumption of the combustion chamber, an increased starting-supercharged air-pressure, as necessary for as favorable a load acceptance behavior as possible, will establish itself in the supercharged air lines whereas during the acceleration of the internal combustion engine, the output of the combustion chamber is increased for a rapid increase of the supercharged air pressure in the supercharged air line in order to attain a spontaneous load acceptance behavior of the internal combustion engine; during a further increase of the supercharged air pressure in the supercharged air line, initiated by the increasing exhaust gas supply with an increasing internal combustion engin
August 1, 1975
Date of Patent:
April 19, 1977
Motoren- und Turolnen-union Friedrichshafen GmbH
Wolfgang Rudert, Robert Schulmeister, Manfred Schlaupitz, Norbert Braetsch
Abstract: A power plant in which a turbine is driven by the combustion products of hydrocarbon fuel, air under superatomspheric pressure, and the exhaust gases of an internal combustion engine. Air is supplied by a compressor which is driven by the turbine.
Abstract: A power plant comprises a compression ignition internal combustion engine supercharged by a turbo-compressor set the turbine of which is supplied in parallel through the exhaust duct of the engine and through a by-pass passage starting from the compressor and provided with an auxiliary combustion chamber. The power plant comprises also a recycling duct one end of which is located between the downstream end of the auxiliary combustion chamber and the turbine inlet and the other end of which is disposed in the compressor intake duct. The recycling duct is closed once the compressor can, without recycling, produce upstream of the engine conditions for spontaneous ignition.
Abstract: An auxiliary combustion chamber for use with a supercharged Diesel engine comprises a fuel injection and spraying device adapted to operate with delivery rates which are variable within a broad range. The device has a fuel injection port which opens into the chamber. The size of the port is such that the fuel is mechanically atomized when injected at the maximum rate. Air passage nozzles open into the combustion chamber at a location close to the port and deliver air jets at a speed and at a delivery rate sufficient for it to atomize the fuel effectively at minimum fuel delivery rate.
Abstract: For improving idling and low load operation of a low compression supercharged combustion engine provided with a continuously open bypass at low ambient temperature, recycling of exhaust gas is provided. A branch pipe recycles part of the combustion gas delivered by an auxiliary combustion chamber fed by the bypass to the driven gas inlet of an ejector diffuser located between the compressor and the intake manifold of the engine.
Abstract: A four-stroke compression-ignition engine is supercharged by a compressor driven by a turbine. The turbine is fed in parallel by the exhaust manifold of the engine and by a passage provided with an auxiliary combustion chamber upstream of the exhaust manifold. The inlet and exhaust manifolds of the engine have distributing valves adapted to open these manifolds simultaneously during each transfer phase (exhaust plus inlet phase). The inlet and exhaust manifolds have a throttle to make gases heated by the auxiliary combustion chamber flow back into the cylinders of the engine in order to assist self-ignition.
Abstract: An internal combustion engine of the expansible chamber type and preferably a diesel engine is equipped with a turbo-compressor unit, comprising at least one compressor and at least one turbine, and at least one bypass pipe enabling direct and permanent passage for the air delivered through the compressor to the turbine inlet.The diesel engine is supercharged by the compressor driven by the turbine. Regulating means are provided to limit the rotary speed of the supercharging unit so that it operates at or above a minimum threshold value such that the engine, which has a compression ratio of less than 12, can be started and kept running at low power without difficulty.
Abstract: Method and device for cleaning an exhaust gas-driven power turbine of a supercharging set of an internal combustion engine, wherein washing liquid under pressure is fed during the washing periods into injection nozzles fitted onto the inlet ducts for exhaust gases on said turbine and a compressed gas is fed into said injection nozzles outside of the washing periods.
Abstract: A supercharging system for a vehicle having an internal combustion engine comprises a shaft carrying a gas turbine rotor at one axial end and a centrifugal air compressor rotor at the other axial end. A pair of bearings mounting the shaft for rotation in a housing are adapted to be attached to the vehicle, the housing at one axial end a turbine nozzle ring and a turbine exhaust ring cooperable with the turbine rotor, and having at the other axial end an axially located compressor inlet member and a radially located compressor outlet member cooperable with the compressor rotor. The turbine nozzle ring is adapted to be connected to the exhaust manifold of the engine and the compressor outlet member is adapted to be connected to the intake manifold of the engine thereby supercharging the same.
Abstract: Diesel engines, equipped with a turbocompressor unit with a combustion chamber upstream of the turbine, comprising a by-pass duct enabling direct and permanent passage between the outlet of the compressor of the turbocompressor unit and said combustion chamber, comprise in addition, for the starting of the turbocompressor unit, a starting device comprising pressure difference generating means. These means are positioned in the by-pass duct in the midst of the air-flow between the compressor and the turbine and arranged to create a flow in the direction of the turbine of the turbocompressor unit. The pressure difference generating means may be constituted by a blower driven by an electric motor, or by an injector supplied with air under pressure and generating a flow by the effect of induction.