An internal combustion engine and a method of controlling an internal combustion engine are provided, that are more efficient than existing engines. The internal combustion engine includes a combustion chamber, and the engine is configurable to operate in: a compressionless operating mode where the engine is driven by combustion of fuel and oxidant in the combustion chamber without compression of the fuel and oxidant; and a compression generating operating mode where the engine is used to compress fluid in the combustion chamber.

The solution of the invention is an internal combustion engine with oxygen concentrating equipment (80) wherein the air compressed in the compression stroke is not yet used for combustion but taken out of the cylinder space (15) and used for operating the oxygen concentrating equipment (80). The essence of the invention is that the cylinder space (15) and one or more cells of the oxygen concentrating equipment (80) are temporarily connected during each compression stroke of the engine. The air taken in the cylinder space (15) during the intake stroke and pushed out by the piston (5) during the compression stroke charges one or more cells (41 A-41Z, 51 A-51Z) of the oxygen concentrating equipment (80) and after separating most of the nitrogen in the cells (41 A-41Z, 51A-51Z), the oxygen rich air is injected into the cylinder space (15) through a compressor (33) at the beginning of the expansion stroke by an injector (11). The fuel is also introduced into the cylinder space (15) at the beginning of the expansion stroke by an injector. The ignition may be spark ignition, self-ignition (heat ignition) or their load dependent, speed dependent or power requirement dependent dynamic combination. The invention further relates to the method, the computer program product and the computer-readable medium operating the internal combustion engine with oxygen concentrating equipment.

The solution of the invention is an internal combustion engine with oxygen concentrating equipment (80) wherein the air compressed in the compression stroke is not yet used for combustion but taken out of the cylinder space (15) and used for operating the oxygen concentrating equipment (80). The essence of the invention is that the cylinder space (15) and one or more cells of the oxygen concentrating equipment (80) are temporarily connected during each compression stroke of the engine. The air taken in the cylinder space (15) during the intake stroke and pushed out by the piston (5) during the compression stroke charges one or more cells (41 A-41Z, 51 A-51Z) of the oxygen concentrating equipment (80) and after separating most of the nitrogen in the cells (41 A-41Z, 51A-51Z), the oxygen rich air is injected into the cylinder space (15) through a compressor (33) at the beginning of the expansion stroke by an injector (11). The fuel is also introduced into the cylinder space (15) at the beginning of the expansion stroke by an injector. The ignition may be spark ignition, self-ignition (heat ignition) or their load dependent, speed dependent or power requirement dependent dynamic combination. The invention further relates to the method, the computer program product and the computer-readable medium operating the internal combustion engine with oxygen concentrating equipment.

Described are oxygen enrichment systems that allow combustion powered vehicles to operate in reduced oxygen environments.

Described are oxygen enrichment systems that allow combustion powered vehicles to operate in reduced oxygen environments.

A system and method of exhaust gas recirculation (EGR) in an internal combustion engine are provided. The EGR system includes a first EGR flow path and a second EGR flow path independent of the first EGR flow path that are each configured to recirculate high pressure exhaust from the exhaust system back to the engine intake system. The system includes a controller in operable communication with the EGR system configured to selectively control an amount of EGR flow through at least one of the first and second EGR flow paths.

A system and method of exhaust gas recirculation (EGR) in an internal combustion engine are provided. The EGR system includes a first EGR flow path and a second EGR flow path independent of the first EGR flow path that are each configured to recirculate high pressure exhaust from the exhaust system back to the engine intake system. The system includes a controller in operable communication with the EGR system configured to selectively control an amount of EGR flow through at least one of the first and second EGR flow paths.

A system and method of exhaust gas recirculation (EGR) in an internal combustion engine are provided. The EGR system includes a first EGR flow path and a second EGR flow path independent of the first EGR flow path that are each configured to recirculate high pressure exhaust from the exhaust system back to the engine intake system. The system includes a controller in operable communication with the EGR system configured to selectively control an amount of EGR flow through at least one of the first and second EGR flow paths.

A system and method of exhaust gas recirculation (EGR) in an internal combustion engine are provided. The EGR system includes a first EGR flow path and a second EGR flow path independent of the first EGR flow path that are each configured to recirculate high pressure exhaust from the exhaust system back to the engine intake system. The system includes a controller in operable communication with the EGR system configured to selectively control an amount of EGR flow through at least one of the first and second EGR flow paths.

A system and method of exhaust gas recirculation (EGR) in an internal combustion engine are provided. The EGR system includes a first EGR flow path and a second EGR flow path independent of the first EGR flow path that are each configured to recirculate high pressure exhaust from the exhaust system back to the engine intake system. The system includes a controller in operable communication with the EGR system configured to selectively control an amount of EGR flow through at least one of the first and second EGR flow paths.