摘要:
Disclosed is a control device for a waste heat recovery system which enables improvement in the responsiveness of the output control for a power turbine and a steam turbine with respect to sudden changes in the inboard load. The control device for a waste heat recovery system is equipped with: a power turbine that provides drive using engine exhaust gas and a steam turbine that provides drive using steam generated with an engine exhaust gas economizer, and is equipped with a power turbine control means which controls the output of the power turbine and a steam turbine control means which controls the output of the steam turbine, and both of which drive an electrical generator by means of the power turbine and the steam turbine. The power turbine control means is equipped with: a power turbine feedback control means which calculates a control valve operation amount based on the deviation between a power turbine target value a;nd the actual power turbine output; and a power turbine feed-forward control means which extracts a control valve operation amount from a power turbine degree-of-opening command map wherein the relationship between the engine load, the power turbine output target value calculated from the engine load, and the control valve operation amount has been preset. The power turbine control means sets the degree of opening of the control valve by adding the operation amount from the feed-forward control means and the operation amount from the feedback control means.
摘要:
The invention relates to an internal combustion engine (10) comprising a turbocompound-system (60) which comprises a waste gas turbo charger (14), a charge air cooler (24), in addition to a user turbine (42). Said user turbine (42) can be connected to the crankshaft (58) of the internal combustion engine (10) by means of a drive (50) with damping coupling (52). A switchable compressor (40) is received in a multi-cylinder suction pipe (28) and can be coupled either to the user turbine (42) or to the internal combustion engine (10).
摘要:
A system for recovering the unused energy of exhaust gas (10) of an internal combustion engine (1) comprises a charge device (6), driven by the exhaust gas (10), for generating compressed intake air for the internal combustion engine (1), and an air compressor (14) having at least one compression stage, said air compressor being connected to the charge device (6) to withdraw at least a partial quantity of the compressed intake air, the partial quantity of the compressed intake air of the charge device (6) that can be withdrawn by the air compressor (14) being adjustable. The invention also relates to an internal combustion engine (1) comprising said system and to a corresponding method.
摘要:
A method of operation of an electric turbocompounding system for a reciprocating engine comprises the steps of retrieving from the engine ECU data pertaining to engine condition, retrieving from a set of turbine efficiency data an optimum turbogenerator speed at the engine condition, setting a desired turbogenerator set speed based on the engine condition and on a speed at which turbine efficiency is deemed to be optimum, measuring an output voltage of the turbogenerator, comparing the measured voltage with a pre-determined voltage range and where the measured voltage falls outside of the pre-determined voltage range, adjusting the turbogenerator set speed to reduce or increase the output voltage to within the pre-determined voltage range. The method also takes account of sudden increase in torque demand, such as accelaration, and additional exhaust gas recirculation (egr).
摘要:
A power unit for an automotive vehicle includes an internal combustion engine, an electric machine electrically connected to electrical power storage arrangement, and a turbocharger comprising a first turbine located in an exhaust line of the engine. This power unit further includes a second turbine, located in an exhaust line of the engine and drivingly connected to the electric machine, and a transmission set. A first input/output of the transmission set is connected to the second turbine and a second input/output of the transmission set is connected to a crankshaft of the internal combustion engine. The transmission set has an adjustable speed reduction ratio between its first and second inputs/outputs.
摘要:
The present invention suggests the combination ( fig. 2 ) of a conventional multi-cylinder engine, conveniently a most common non-modified four cylinders Otto or Diesel engine, hereinafter called "first engine"(1), with a second piston engine, hereinafter called "second engine"(2) having a similar constructional configuration as the first engine, that is in particular: a) a crankshaft synchronised or in common with the first engine b) same valve distribution system, i.e. a twin camshaft for separately driving the inlet and the outlet valves, except that the cam profiles are opportunely modified Said second engine is however modified to eliminate or deactivate the injection as well as the ignition systems, so as to operate as simple expanding chamber, the exhaust gases of the first engine being led to flow into said chambers and further expand therein, thanks to a particular design of the second engine's cam (6,7) profiles. The transfer of said gases takes place through a simple new component called "capacitor"(3), which is fluidly connected, and closely mounted (see fig.2 ), to the exhaust pipe of the first engine (1) on one side, and fluidly connected to the inlet ducts of the second engine (2) on the other side, to form a common sealed volume between the two engines.
摘要:
L'invention se rapporte à un moteur à combustion interne utilisant : a) d'une part au moins un cylindre (1) fonctionnant en cylindre basse pression (BP) suivant un mode du type deux temps, et b) d'autre part, deux cylindres (2,3) fonctionnant en cylindres comburants haute pression (HP) suivant un mode du type quatre temps, la cylindrée de chacun des cylindres HP étant inférieure à celle du cylindre BP (1), les cylindres HP refoulant alternativement leurs gaz comburés vers le cylindre BP en vue d'une deuxième détente des gaz comburés.
摘要:
An engine apparatus comprising an internal combustion engine (1) having an exhaust gas line (2) and at least a first (3) and a second (6) turbine for recovering energy from the exhaust gases arranged in series on said line, characterized in that a converter (8) comprising a catalyst for treating said gases is arranged on said exhaust line in an intermediate position between the two turbines. Exhaust gas treatment process that can be incorporated in an engine as described above.