Abstract

A cylinder unit includes a piston disposed in the cylinder bore that is connected to a piston connecting frame member. The piston connecting frame member replaces a conventional connecting rod, and reciprocates exclusively along the bore axis. A crank connecting member has a linear rail at its top that is captured in a transverse gap along the bottom of the piston connecting frame member, and converts the circular movement of a crank throw to linear motion of the piston connecting frame member.

IPC Classes  ?

• F16C 7/02 - Constructions of connecting-rods with constant length
• F16J 1/10 - Connection to driving members
• F16J 7/00 - Piston-rods, i.e. rods rigidly connected to the piston
• F16C 29/02 - Sliding-contact bearings
• F16J 1/12 - Connection to driving members with piston-rods, i.e. rigid connections
• F02B 75/18 - Multi-cylinder engines
• F02B 75/20 - Multi-cylinder engines with cylinders all in one line

Abstract

A cylinder unit includes a piston disposed in the cylinder bore that is connected to a piston connecting frame member. The piston connecting frame member replaces a conventional connecting rod, and reciprocates exclusively along the bore axis. A crank connecting member has a linear rail at its top that is captured in a transverse gap along the bottom of the piston connecting frame member, and converts the circular movement of a crank throw to linear motion of the piston connecting frame member.

IPC Classes  ?

• F02B 75/32 - Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
• F02B 33/06 - Engines with reciprocating-piston pumpsEngines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps
• F01B 9/00 - Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups
• F01B 9/04 - Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups with rotary main shaft other than crankshaft
• F01B 9/02 - Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups with crankshaft

Abstract

An internal combustion engine includes one or more unopposed cylinder units where each cylinder unit drives the crankshaft via a yoke assembly rather than a conventional connecting rod. The yoke assembly is formed by a connecting rod assembly that can have an upper portion having a connecting member connected to the piston, and a lower portion. The connecting rod assembly moves exclusively along the bore axis of the cylinder, with no side to side motion. The connecting rod assembly also defines a transverse slot in the yoke portion in which a connecting rod bearing housing reciprocates with motion of a connecting rod journal on the crankshaft within the transverse slot. Since the motion of the connecting rod is linear, and the connecting rod bearing housing moves circularly, there are no secondary forces resulting in an inline engine using the unopposed cylinder unit configuration.

IPC Classes  ?

• F02B 75/20 - Multi-cylinder engines with cylinders all in one line
• F16C 7/02 - Constructions of connecting-rods with constant length
• F16C 35/02 - Rigid support of bearing unitsHousings, e.g. caps, covers in the case of sliding-contact bearings
• F01B 9/02 - Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups with crankshaft
• F02B 75/32 - Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
• F02B 75/18 - Multi-cylinder engines

Abstract

An internal combustion engine includes one or more unopposed cylinder units where each cylinder unit drives the crankshaft via a yoke assembly rather than a conventional connecting rod. The yoke assembly is formed by a connecting rod assembly that can have an upper portion having a connecting member connected to the piston, and a lower portion. The connecting rod assembly moves exclusively along the bore axis of the cylinder, with no side to side motion. The connecting rod assembly also defines a transverse slot in the yoke portion in which a connecting rod bearing housing reciprocates with motion of a connecting rod journal on the crankshaft within the transverse slot. Since the motion of the connecting rod is linear, and the connecting rod bearing housing moves circularly, there are no secondary forces resulting in an inline engine using the unopposed cylinder unit configuration.

IPC Classes  ?

• F02B 75/20 - Multi-cylinder engines with cylinders all in one line
• F16C 7/02 - Constructions of connecting-rods with constant length
• F16C 35/02 - Rigid support of bearing unitsHousings, e.g. caps, covers in the case of sliding-contact bearings
• F02B 75/18 - Multi-cylinder engines

Abstract

An internal combustion engine using a two stroke cycle includes a pair of opposing cylinder units, each of which are located on opposing sides of a crankcase. In each cylinder unit is a cylinder with a piston disposed in the cylinder. Each piston is coupled to a piston rod that is aligned along an axis that passes through the center of each cylinder bore. The piston rods pass through the crankcase wall into the crankcase chamber, and are further coupled to a yoke. Each cylinder unit has an intake channel from the crankcase chamber to a cylinder intake port in the cylinder. As the piston traverses its upstroke in its cylinder, it creates a vacuum under the piston. At the top of its stroke a piston intake port becomes aligned with the cylinder intake port, allow fuel to be drawn into the cylinder under the piston. As a result, a continuous vacuum is experienced in the crankcase without the need for mechanical valving arrangements.

IPC Classes  ?

• F02B 75/24 - Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
• F02B 25/06 - Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke the cylinder-head ports being controlled by working pistons, e.g. by sleeve-shaped extensions thereof
• F02B 25/08 - Engines with oppositely-moving reciprocating working pistons