There is provided an assembly for an engine configured for linking a piston to a crankshaft (6) of the engine, comprising a pair of primary connecting rods (1a, 1b) configured to link said piston (1) to a secondary connecting rod (2), the secondary connecting rod (2) comprises an upper portion (2a) and a lower portion (2b); a controlling member (3) having a pair of opposed guiding rails (3a, 3b) and a pair of aligned lateral pin joints (30a, 30b), the controlling member (3) is configured to receive a substantial part of the upper portion (2a) of said secondary connecting rod (2); and a controlling member (3) support element configured to enclose the controlling member (3) within a cylinder block (5) of said engine, wherein the secondary connecting rod upper (2a) and lower portions (2b) are connected to each other when a crank shaft joint (8) is trapped between two semi-circular space gaps (28) in each of said secondary connecting rod upper (2a) and lower (2b) portions.

The present invention is directed to a dual engine-compressor system having a crankcase enclosing a crankshaft and having engine cylinder housings and compressor cylinder housings linearly disposed on opposite sides of the crankcase. Combustion pistons are reciprocatingly disposed in the engine cylinder housings and defines alternating combustion chambers on opposite sides of the pistons. Compressor pistons are reciprocatingly disposed in the compressor housings and define alternating low and high pressure compressor chambers on opposite sides of the compressor pistons. The compressor pistons undergo a 4-cycle process to drawn in, re-distribute, and then compress fluid. The compressor cylinder and piston has a series of one-way intakes and reed valves to selectively draw or push fluid in response to movement of the compressor piston.

A riding lawn mower includes a chassis having longitudinal support beam, a drive wheel, an electric motor coupled to the drive wheel, a suspended subframe having a longitudinal subframe beam pivotally coupled to the longitudinal support beam about a pivot axis, and a suspension device coupled between the longitudinal subframe beam and the longitudinal support beam. The longitudinal subframe beam at least partially supports the electric motor. The drive wheel and the electric motor are configured to translate relative to the chassis via the pivotal coupling between the longitudinal support beam and the longitudinal subframe beam.

The present invention is directed to a process for operating a combustion engine having a double-sided piston in a piston cylinder, wherein every stroke of the double-sided piston is a power stroke. Every piston cylinder defines a combustion chamber on each side of the double-sided piston. The process includes igniting a fuel-air mixture in each combustion chamber on each side of double-sided piston during every compression, i.e., at about top dead center and at about bottom dead center. The process utilizes the double-sided piston to achieve two power strokes per piston for each engine cycle.

A marine outboard motor is provided with an internal combustion engine comprising an engine block defining at least one cylinder, an air intake configured to deliver a flow of air to the at least one cylinder; and an air intake duct forming part of an air intake path for delivering the flow of air to the air intake. The engine further includes a flow sensing arrangement located in the air intake duct and comprising a flow meter configured to generate a signal indicative of a flow rate of the flow of air through the air intake duct, and a bluff body located in the air intake duct upstream of the flow meter, wherein the flow meter is a vortex shedding flow meter.

An internal combustion may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted within the cylinder. The piston may be configured to move in the cylinder in a first stroke from one end to another. The first stroke may include an expansion stroke portion and a non-expansion stroke portion. The non-expansion stroke portion may include a momentum stroke portion. The non-expansion stroke portion may include a scavenging phase. The engine may further include first and second piston rod portions extending from opposite faces of the piston. Passageways in the piston rod portions may be configured to communicate gases between a combustion chamber and other locations.

The present invention is directed to a dual engine-compressor system having a crankcase enclosing a crankshaft and having engine cylinder housings and compressor cylinder housings linearly disposed on opposite sides of the crankcase. Combustion pistons are reciprocatingly disposed in the engine cylinder housings and defines alternating combustion chambers on opposite sides of the pistons. Compressor pistons are reciprocatingly disposed in the compressor housings and define alternating low and high pressure compressor chambers on opposite sides of the compressor pistons. The compressor pistons undergo a 4-cycle process to drawn in, re-distribute, and then compress fluid. The compressor cylinder and piston has a series of one-way intakes and reed valves to selectively draw or push fluid in response to movement of the compressor piston.

An engine assembly includes an air-cooled engine and an external oil reservoir. The engine includes a vertically-oriented crankshaft a crankcase cover having a front portion and a rear portion, wherein the front portion of the crankcase cover and the cylinder head are located forward of a vertical plane that includes the crankshaft axis, a return pump housing formed in the exterior of the crankcase cover, a return pump positioned in the return pump housing, and a return pump inlet formed through the crankcase cover, wherein the return pump inlet is located in the front portion of the crankcase cover and the return pump inlet is located closer to the camshaft than to the crankshaft. The external oil reservoir includes an oil tank and an oil filter assembly.

An outboard motor comprises an engine block having vertically-aligned first and second banks of cylinders that extend from each other in a V-shape, a vertically-extending central drain passage located below the first bank of cylinders and being configured to drain lubricant to an underlying sump, a vertically-extending crankshaft, and a central deflector located between the first and second banks of cylinders. The central deflector extends from the engine block towards the crankshaft and being configured to deflect lubricant away from the crankshaft to the central drain passage.

The present invention is directed to a dual engine-compressor system having a crankcase enclosing a crankshaft and having engine cylinder housings and compressor cylinder housings linearly disposed on opposite sides of the crankcase. Combustion pistons are reciprocatingly disposed in the engine cylinder housings and defines alternating combustion chambers on opposite sides of the pistons. Compressor pistons are reciprocatingly disposed in the compressor housings and define alternating low and high pressure compressor chambers on opposite sides of the compressor pistons. The compressor pistons underdo a 4-cycle process to drawn in, re-distribute, and then compress fluid. The compressor cylinder and piston has a series of one-way intakes and reed valves to selectively draw or push fluid in response to movement of the compressor piston.