Internal combustion engine

摘要

An internal combustion engine comprises a four stroke working cylinder, a four stroke EGR cylinder, an intake system for supplying a combustion air charge to the cylinders, a first exhaust system for removing exhaust gas from the four stroke working cylinder and to the atmosphere and a second exhaust system for removing exhaust from the four stroke EGR cylinder and to the intake system, wherein the combustion air charge is a combination of combustion air and exhaust gas from the four stroke EGR cylinder.

主权项

1. An inline 4-cylinder internal combustion engine comprising:
two four stroke working cylinders; two four stroke EGR cylinders; an intake system configured for supplying a combustion air charge to the four stroke working cylinders and the four stroke EGR cylinders; a first exhaust system configured for removing exhaust gas from the four stroke working cylinders and delivering the exhaust gas from the four stroke working cylinders to the atmosphere; and a second exhaust system configured for removing exhaust from the four stroke EGR cylinders and delivering the exhaust to the intake system, such that the combustion air charge comprises the exhaust gas from the four stroke EGR cylinders; wherein cylinders 1 and 4 are configured as four stroke working cylinders and cylinders 2 and 3 are configured as four stroke EGR cylinders; the engine having a cylinder firing order of 1, 3, 4, 2.