An internal combustion engine system and a method for an internal combustion engine system
AssigneeVolvo Truck Corporation
InventorsLennart ANDERSSON, Arne ANDERSSON, Bengt JOHANSSON, Nhut LAM, Staffan LUNDGREN
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Abstract
An internal combustion engine system includes at least one combustor, and a first expander arranged to receive exhaust gases from at least one of the at least one combustor, and to expand and extract energy from the exhaust gases, wherein the system includes a second expander arranged to receive exhaust gases from the first expander, and to expand and extract energy from the exhaust gases.
Claims42
An internal combustion engine system comprising an internal combustion engine comprising
- at least one combustor, and
- a first expander arranged to receive exhaust gases from at least one of the at least one combustor, and to expand and extract energy from the exhaust gases,
- wherein the engine comprises a crankshaft, and the combustor comprises a piston arranged to reciprocate in a cylinder, and to drive the crankshaft,
- wherein the first expander is a piston expander arranged to drive the crankshaft with the extracted energy, or a turbine arranged to drive the crankshaft with the extracted energy,
- wherein the engine comprises a second expander arranged to receive exhaust gases from the first expander, and to expand and extract energy from the exhaust gases,
- wherein the system comprises an exhaust treatment device arranged to receive exhaust gases from the first expander, to process the received exhaust gases, and to deliver the processed exhaust gases to the second expander,
- and, where the first expander is a piston expander, the first expander comprises an expander inlet valve and/or an expander exhaust valve, the engine further comprising an expander variable valve timing mechanism arranged to actuate the expander inlet valve and/or an expander variable valve timing mechanism arranged to actuate the expander exhaust valve
- or, where the first expander is a turbine, the first expander is a variable-geometry turbine.
An internal combustion engine system comprising an internal combustion engine comprising
- at least one combustor, and
- a first expander arranged to receive exhaust gases from at least one of the at least one combustor, and to expand and extract energy from the exhaust gases,
- wherein the engine comprises a second expander arranged to receive exhaust gases from the first expander, and to expand and extract energy from the exhaust gases,
- wherein the first expander comprises a hydrolysing reactor.
An internal combustion engine system comprising an internal combustion engine comprising
- at least one combustor, and
- an expander arranged to receive exhaust gases from at least one of the at least one combustor, and to expand and extract energy from the exhaust gases,
- wherein the system comprises an exhaust treatment device arranged to receive exhaust gases from the expander, and to process the received exhaust gases,
- and that the system comprises an injector arranged to inject reductant for the exhaust treatment device, upstream of the expander or into the expander.
A combined compressor and expander for an internal combustion engine system, comprising
- a cylinder,
- a piston adapted to be connected to a crankshaft of the engine system, and arranged to reciprocate in the cylinder,
- the combined compressor and expander being adapted to admit air to the cylinder, on a first side of the piston, and to compress the air by means of the piston for a combustion process of the engine system,
- the combined compressor and expander further being adapted to admit exhaust gases, obtained from a combustion process of the engine system and/or an exhaust gas treatment process of the engine system, to the cylinder, on a second side of the piston, to expand the exhaust gases by means of the piston to extract energy from the expanded exhaust gases.
A method for an internal combustion engine system comprising
- at least one combustor,
- a first expander arranged to receive exhaust gases from at least one of the at least one combustor, and to expand and extract energy from the exhaust gases,
- wherein the system comprises a crankshaft, and the combustor comprises a piston arranged to reciprocate in a cylinder, and to drive the crankshaft,
- wherein the first expander is a piston expander arranged to drive the crankshaft with the extracted energy, or a turbine arranged to drive the crankshaft with the extracted energy, and
- a second expander arranged to receive exhaust gases from the first expander, and to expand and extract energy from the exhaust gases,
- comprising providing an exhaust treatment device arranged to receive exhaust gases from the first expander, to process the received exhaust gases, and to deliver the processed exhaust gases to the second expander,
- the method comprising determining the temperature in the exhaust treatment device, and adjusting the swallowing capacity of the first expander to control the temperature of the process in the exhaust treatment device.
A method for an internal combustion engine system comprising
- a combustor arranged to combust air and fuel,
- an expander arranged to receive, expand and extract energy from exhaust gases from the combustor, and to expel the exhaust gases from the expander by means of an expander exhaust valve, and
- wherein the system comprises a crankshaft, and the combustor comprises a piston arranged to reciprocate in a cylinder, and to drive the crankshaft,
- wherein the expander is a piston expander arranged to drive the crankshaft with the extracted energy, and
- comprising providing an exhaust treatment device arranged to receive the expelled exhaust gases from the expander and to process the exhaust gases,
- the method comprising determining the temperature in the exhaust treatment device, and controlling (S6) the expander exhaust valve to control the temperature of the process in the exhaust treatment device.
A method for an internal combustion engine system comprising a combustor arranged to combust air and fuel, an expander arranged to receive, expand and extract energy from exhaust gases from the combustor, the expander comprising an inlet valve, and an exhaust treatment device arranged to receive the exhaust gases from the expander and to process the exhaust gases, the method comprising
- injecting (S4) reductant for the exhaust treatment device upstream of the expander or into the expander,
- controlling the expander inlet valve to allow exhaust gases into the expander,
- wherein the timing and/or the duration of the reductant injection is coordinated with the control of the expander inlet valve so as for the reductant and the exhaust gases to mix in the expander.
42-45. (canceled)
Dependencies are inferred from the claim text.