There is presented various embodiments disclosed in this application, including an improved crankshaft system using a load connecting member which provides a greater maximum torque angle than a conventional system, thereby improving efficiency and power.

An internal combustion engine includes a crankcase that defines a crank chamber, a crankshaft that has a crank housed in the crank chamber and is rotatably supported on the crankcase, a cylinder block that is joined to the crankcase and defines a plurality of cylinders in a horizontally-opposed arrangement, a to-be-detected body that rotates integrally with the crankshaft, and a detection sensor that extends through the crankcase from an upper face of the crankcase, is made to face a trajectory of the to-be-detected body, and generates a pulse signal in response to movement of the to-be-detected body. Thus, in a so-called horizontally-opposed internal combustion engine, a structure for disposing a detection sensor that can detect the angular velocity of a crankshaft with high precision is provided.

A piston internal combustion engine with generator has two cylinders and cylinder heads and pistons with connecting rods and two crankshafts which are connected by gears with a ratio of 1:1 (with opposite direction of rotation). The first crankshaft with the gear is mounted parallel to the second crankshaft with the second gear in one engine case such, that the gears engage. The first crankshaft is coupled to the first generator rotor and the second crankshaft is coupled to the second generator rotor or the flywheel. The moment of inertia of the first crankshaft assembly with the first gear and the first generator rotor is equal to the moment of inertia of the second crankshaft assembly with the second gear and the second generator rotor or flywheel. The cylinders with the pistons and are positioned perpendicularly to the plane of symmetry between the crankshafts, with the axes of the pair of cylinders lying in a plane with the both pistons being at the top dead center simultaneously.

A cylinder assembly includes a cylinder with an inlet channel of compressed air and an outlet channel of exhaust gas located in the middle which is closed by a head and a partition. One end of a push rod goes through a linear slide bearing located in the partition. A working piston is rigidly embedded on the push rod. Bottom and top compensating pistons are separated from the working piston by spiral compensating springs. A counter-rotating combustion engine including a crank mechanism is connected to two oppositely directed identical cylinder assemblies via an engine case. The crank mechanism constitutes a crankshaft having two crank half shafts lying opposite each other and connected rotationally. The crank mechanism includes two pairs of connecting rods whose ends are rotationally connected to one of crank half shafts via a rotary shaft. The other ends of the connecting rods are connected to one of two shafts, each connected to a push rod of a cylinder assembly.

A reciprocating linear/rotational motion conversion device has a main shaft, a linear motion guiding mechanism, a sector gear and a rack frame. The sector gear is fixedly connected with the main shaft. A rack pair is arranged on the inner wall of the rack frame. The rack pair comprises a first gear rack and a second gear rack separately arranged on both sides of the sector gear. The reciprocating linear/rotational motion conversion device further includes a reversing mechanism fixedly connected with the main shaft. A cylinder device contains the reciprocating linear/rotational motion conversion device, connecting rods, pistons and cylinder bodies. The cylinder body is sleeved on the piston, and a cylinder head is arranged on one end of the cylinder body.

A reciprocating linear/rotational motion conversion device has a main shaft, a linear motion guiding mechanism, a sector gear and a rack frame. The sector gear is fixedly connected with the main shaft. A rack pair is arranged on the inner wall of the rack frame. The rack pair comprises a first gear rack and a second gear rack separately arranged on both sides of the sector gear. The reciprocating linear/rotational motion conversion device further includes a reversing mechanism fixedly connected with the main shaft. A cylinder device contains the reciprocating linear/rotational motion conversion device, connecting rods, pistons and cylinder bodies. The cylinder body is sleeved on the piston, and a cylinder head is arranged on one end of the cylinder body.

A mixture-lubricated four stroke engine has a cylinder in which a combustion chamber is formed. The combustion chamber is delimited by a piston which is mounted movably in the cylinder. The engine has an intake channel which discharges into the combustion chamber via an inlet opening controlled by an inlet valve. A mixture formation unit includes at least one fuel opening which discharges into the intake channel. For the lubrication of the crankcase interior, a flow connection connects the intake channel to the crankcase interior via a connecting opening which discharges into the intake channel downstream of the mixture formation unit. The fuel quantity is controlled by a fuel valve. A control unit is configured to activate the fuel valve in a manner dependent on the position of the crankshaft such that the fuel valve is opened at least also during a part of the compression stroke.

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.

A modular engine is provided in which cylinder heads and camshaft carriers with different attributes can be interchanged with one another that allows for an engine head assembly to be put together for achieving various desired characteristics without the need to replace the entire engine or redesign a new engine.