The present invention is configured such that: a cylinder block includes an introducing portion provided at a first side of a cylinder row, cooling liquid being introduced through the introducing portion to a water jacket, a restrictor portion provided in a vicinity of the introducing portion and configured to restrict the cooling liquid, introduced through the introducing portion, from flowing to an intake-side portion of the water jacket, and a discharging portion provided at a middle portion of the cylinder row at an intake side, the cooling liquid being discharged from the water jacket through the discharging portion; and an exhaust-side portion of the water jacket is formed such that a passage cross-sectional area of a cylinder axis direction upper side of the exhaust-side portion is larger than the passage cross-sectional area of a cylinder axis direction lower side of the exhaust-side portion.

An internal combustion engine, includes a cylinder; a piston supported in the cylinder for linear displacement, wherein the piston is operatively connected with a crankshaft of the internal combustion engine via a piston rod; a linear motor including a stator and a rotor, wherein the stator has an independently operable stator element assigned to the cylinder and partially surrounding the piston in circumferential direction with respect to a longitudinal center axis of the cylinder, wherein the rotor is assigned to or forms a part of the piston, and wherein the linear motor being operable for exerting on the piston a compensation force directed in radial direction.

An internal combustion engine, includes a cylinder; a piston supported in the cylinder for linear displacement, wherein the piston is operatively connected with a crankshaft of the internal combustion engine via a piston rod; a linear motor including a stator and a rotor, wherein the stator has an independently operable stator element assigned to the cylinder and partially surrounding the piston in circumferential direction with respect to a longitudinal center axis of the cylinder, wherein the rotor is assigned to or forms a part of the piston, and wherein the linear motor being operable for exerting on the piston a compensation force directed in radial direction.

A cylinder cooling apparatus for an engine may include a plurality of intake ports disposed in a cylinder head and communicating with a corresponding plurality of cylinders, a water supply line extending inside from a side of the cylinder head and communicating with the intake ports, and a water pump supplying water to the intake ports through the water supply line.

A cylinder cooling apparatus for an engine may include a plurality of intake ports disposed in a cylinder head and communicating with a corresponding plurality of cylinders, a water supply line extending inside from a side of the cylinder head and communicating with the intake ports, and a water pump supplying water to the intake ports through the water supply line.

An engine block has one or more bores configured for receiving one or more respective pistons; one or more coolant passages; and one or more lubricant passages. At least portions of the coolant passages and lubricant passages are disposed adjacent to and about the bores so as to cool the bores. The coolant passage portion extends over a first lengthwise portion of the bores and the lubricant passage portion extending over a second lengthwise portion of the bores. The first and second lengthwise portions are longitudinally spaced apart along the bores.

An engine block has one or more bores configured for receiving one or more respective pistons; one or more coolant passages; and one or more lubricant passages. At least portions of the coolant passages and lubricant passages are disposed adjacent to and about the bores so as to cool the bores. The coolant passage portion extends over a first lengthwise portion of the bores and the lubricant passage portion extending over a second lengthwise portion of the bores. The first and second lengthwise portions are longitudinally spaced apart along the bores.

A ferritic aero diesel engine. The ferritic aero diesel engine includes an iron crankcase, a steel crankshaft and eight steel piston assemblies. The iron crankcase has a flat, horizontally opposed eight cylinder arrangement with a first set of cylinder walls defining a first set of cylinders in a first bank and a second set of cylinder walls defining a second set of cylinders in an opposed second bank. The steel crankshaft is rotatably mounted at least partially within the iron crankcase. Each of the steel piston assemblies of the plurality of steel piston assemblies is received within a respective cylinder of the iron crankcase and is coupled to the steel crankshaft. The first and second sets of cylinder walls have a minimum wall thickness of between approximately 4.8 and 5.2 mm.

A ferritic aero diesel engine. The ferritic aero diesel engine includes an iron crankcase, a steel crankshaft and eight steel piston assemblies. The iron crankcase has a flat, horizontally opposed eight cylinder arrangement with a first set of cylinder walls defining a first set of cylinders in a first bank and a second set of cylinder walls defining a second set of cylinders in an opposed second bank. The steel crankshaft is rotatably mounted at least partially within the iron crankcase. Each of the steel piston assemblies of the plurality of steel piston assemblies is received within a respective cylinder of the iron crankcase and is coupled to the steel crankshaft. The first and second sets of cylinder walls have a minimum wall thickness of between approximately 4.8 and 5.2 mm.

Methods and systems are provided for an in-cylinder thermal energy recovery device that utilizes the Rankine Cycle to recover energy from exhaust gasses that may be used to produce additional work in the vehicle. In one example, a method may include outfitting the head area of each cylinder of an engine with a tube array comprising one or more tubes passing through the combustion chamber of the corresponding cylinder. Each tube array may receive an injection of working fluid that is based, in part, on the temperature of the tube array's corresponding cylinder, which may then be utilized to recover heat energy.