Abstract: The present invention relates to a combined heat exchanger and exhaust silencer for a vehicle, comprising a bypass valve configured to: in a first state, allow a flow path for exhaust gas to be open from an inlet to an outlet via an at least partly perforated bypass pipe, and in a second state, close said flow path, whereby at least a main portion of said exhaust gas is forced through a second flow channel comprising a heat exchanger pipe. The second flow channel is formed by an annular space between an at least partly perforated second pipe and an at least partly perforated third pipe. A sound absorbing material surrounds the bypass pipe and the third pipe, and is further arranged inside the second pipe.

Abstract: A vehicle comprising: an internal combustion engine comprising a combustion chamber and an exhaust duct; and a system for recovering waste heat of the internal combustion engine, wherein the waste heat recovery system comprises: i) a first heat exchanger configured to evaporate a working fluid by transferring heat from a heated medium originating from the engine; ii) an expander unit configured to expand the working fluid that has been evaporated in the first heat exchanger and produce a power output; iii) a second heat exchanger configured to condense the working fluid; and iv) at least one pump for feeding the condensed working fluid to the first heat exchanger. The invention is characterized in that the waste heat recovery system is configured to use water as working fluid.

Abstract: The disclosure relates to a method for operating an internal combustion engine in a six-stroke mode, wherein the engine comprises at least one cylinder with a reciprocating piston, each cylinder having at least one inlet and outlet valve. The method involves performing a first stroke where a gas comprising at least air is induced into a combustion chamber from an intake conduit; a second stroke where the gas and injected fuel is compressed; a third stroke where the compressed fuel/gas mixture is expanded following an ignition; a fourth stroke where combusted exhaust gas is expelled through a catalyst body into a first exhaust conduit; a fifth stroke where pressurized fuel and pressurized heated water is injected into the combustion chamber to be expanded; and a sixth stroke where steam and gaseous fuel mixture is expelled through the catalyst body into a second exhaust conduit.

Abstract: The present invention relates to a combined heat exchanger and exhaust silencer for a vehicle, comprising a bypass valve configured to: in a first state, allow a flow path for exhaust gas to be open from an inlet to an outlet via an at least partly perforated bypass pipe, and in a second state, close said flow path, whereby at least a main portion of said exhaust gas is forced through a second flow channel comprising a heat exchanger pipe. The second flow channel is formed by an annular space between an at least partly perforated second pipe and an at least partly perforated third pipe. A sound absorbing material surrounds the bypass pipe and the third pipe, and is further arranged inside the second pipe.

Abstract: The disclosure relates to a method for operating an internal combustion engine in a six-stroke mode, wherein the engine comprises at least one cylinder with a reciprocating piston, each cylinder having at least one inlet and outlet valve. The method involves performing a first stroke where a gas comprising at least air is induced into a combustion chamber from an intake conduit; a second stroke where the gas and injected fuel is compressed; a third stroke where the compressed fuel/gas mixture is expanded following an ignition; a fourth stroke where combusted exhaust gas is expelled through a catalyst body into a first exhaust conduit; a fifth stroke where pressurized fuel and pressurized heated water is injected into the combustion chamber to be expanded; and a sixth stroke where steam and gaseous fuel mixture is expelled through the catalyst body into a second exhaust conduit.