A split cycle internal combustion engine includes a combustion cylinder accommodating a combustion piston and a compression cylinder accommodating a compression piston. The engine also includes a controller arranged to receive an indication of a parameter associated with the combustion cylinder and/or a fluid associated therewith and to control an exhaust valve of the combustion cylinder in dependence on the indicated parameter to cause the exhaust valve to close during the return stroke of the combustion piston, before the combustion piston has reached its top dead centre position (TDC), when the indicated parameter is less than a target value for the parameter; and close on completion of the return stroke of the combustion piston, as the combustion piston reaches its top dead centre position (TDC), when the indicated parameter is equal to or greater than the target value for the parameter.

The ability of the ignition piston engine is to use the disel technic of igniting the fuel air mixture by compression with out using an injector. The ignition piston engine can burn a leaner air fuel mixture than any other engine there by giving a cleaner exhaust and more economy. The ignition piston engine can burn any type of fuel that flows in air and is combustable by heat; like gasolene, diesel, propane, natural gas, and kerosene in any desired air fuel mix. And it can do it with out using a spark plug.

The present invention relates to an internal combustion engine arrangement (100) comprising a first (102) and a second (104) expansion cylinder, and an interconnection conduit (106) between an outlet (108) of the first expansion cylinder (102) and an outlet (110) of the second expansion cylinder (104), wherein the outlet of the first expansion cylinder is further arranged in fluid communication with an exhaust gas recirculation (EGR) conduit (112) for delivery of a flow of combusted exhaust gas to an intake passage of the internal combustion engine arrangement, and wherein the second expansion cylinder comprises a reducing agent injection device (114) for controllably delivery of a reducing agent into the second expansion cylinder.

The present invention relates to an internal combustion engine arrangement (100) comprising a first (102) and a second (104) expansion cylinder, and an interconnection conduit (106) between an outlet (108) of the first expansion cylinder (102) and an outlet (110) of the second expansion cylinder (104), wherein the outlet of the first expansion cylinder is further arranged in fluid communication with an exhaust gas recirculation (EGR) conduit (112) for delivery of a flow of combusted exhaust gas to an intake passage of the internal combustion engine arrangement, and wherein the second expansion cylinder comprises a reducing agent injection device (114) for controllably delivery of a reducing agent into the second expansion cylinder.

A split-cycle engine includes: a first cylinder housing a first piston, wherein the first piston performs an intake stroke and a compression stroke, but does not perform an exhaust stroke; a second cylinder housing a second piston, wherein the second piston performs an expansion stroke and an exhaust stroke, but does not perform an intake stroke; and a valve chamber housing a valve, the valve comprising an internal chamber that selectively fluidly couples to the first and second cylinders, wherein the valve and internal chamber move within the valve chamber and relative to the first and second cylinders.

The invention relates to an internal combustion engine comprising a combustion cylinder housing a combustion piston, a compressor cylinder housing a compressor piston, an expander cylinder housing an expander piston, and a crankshaft connected to the combustion piston and the expander piston by a respective connecting rod. The internal combustion engine further comprises a connecting element rigidly connecting the compressor piston and the expander piston such that the compressor piston and the expander piston move in unison.

The invention relates to an internal combustion engine comprising a combustion cylinder housing a combustion piston, a compressor cylinder housing a compressor piston, an expander cylinder housing an expander piston, and a crankshaft connected to the combustion piston and the expander piston by a respective connecting rod. The internal combustion engine further comprises a connecting element rigidly connecting the compressor piston and the expander piston such that the compressor piston and the expander piston move in unison.

It is disclosed a boxer engine with two substantially mirror-symmetric engine sides (L, R) comprising a crankshaft (1) to which is connected, at least two main scotch yoke assemblies (110) each having one main piston (7) arranged inside one main cylinder (I, III; II, IV) of each engine side (R; L), and at least one auxiliary scotch yoke assembly (120) having a pair of auxiliary pistons (8) arranged inside a pair of auxiliary cylinders (V, VII; VI, VIII) of each engine side (R; L), wherein the main scotch yoke assemblies (110) are arranged synchronized on the crankshaft (1) and the at least one auxiliary scotch yoke assembly (120) is arranged 180° offset on the crankshaft (1), each auxiliary piston (7) defining an outer space and an inner space within each auxiliary cylinder (V, VII; VI, VIII), the inner space facing the opposite engine side (R; L), wherein, said inner spaces of each auxiliary cylinder (V, VII; VI, VIII) pair are in fluid communication and forming a compression chamber, said compression chamber comprises first and second check valves (69, 70), wherein the auxiliary cylinder (V, VII; VI, VIII) pair is adapted to suck in ambient air through the first check valve (69) and compress and pump said air out through the second check valve (70) into a main cylinder (I, III; II, IV) of the opposite engine side (R; L), and said outer spaces of each auxiliary cylinder (V, VII; VI, VIII) pair are in fluid communication and are receiving pressurized exhaust gas from a main cylinder (I, III; II, IV) of the same engine side (R; L).

The invention provides an internal combustion engine system (1) comprisingat least one combustor (3), anda first expander (4) arranged to receive exhaust gases from at least one of the at least one combustor (3), and to expand and extract energy from the exhaust gases, characterized in that the system comprises a second expander (5) arranged to receive exhaust gases from the first expander (4), and to expand and extract energy from the exhaust gases.

The invention provides an internal combustion engine system (1) comprisingat least one combustor (3), anda first expander (4) arranged to receive exhaust gases from at least one of the at least one combustor (3), and to expand and extract energy from the exhaust gases, characterized in that the system comprises a second expander (5) arranged to receive exhaust gases from the first expander (4), and to expand and extract energy from the exhaust gases.