Abstract:
An internal combustion engine includes a crankcase, a crankshaft disposed at least in part in the crankcase, and acylinder block connected to the crankcase. A piston is movably disposed within acylinder of the cylinder block and isoperatively connected to the crankshaft. Afirst pin bossof the pistondefinesa first pin bore having a first bore end opening in an outer surface of apiston skirtof the piston. Asecond pin boss of the piston definesa second pin bore having a second bore end opening in the outer surface of the piston skirt opposite the first bore end.A pin is disposed in the first and second pin bores. Obstructing members are disposed within the first and second pin bores respectively for blocking passage through the firstand secondpin bores.Aconnecting rod connects the pin to the crankshaft.
Abstract:
Cooperatively shaped piston and cylinder head arrangements for internal combustion engines are disclosed. The piston may have a domed head with one or more curved exhaust channels and inlet channels formed therein. The piston cylinder may have curved surfaces that are exact or close inverse or negative counterparts to the curved surfaces of all or part of the domed head, including the exhaust channels, and/or inlet channels formed on the piston.
Abstract:
A reciprocating piston engine wherein the movement of a piston within the combustion chamber creates vortices in the fluid within the chamber and wherein the orientation of the vortices is more normal to the axis of movement of the piston than parallel to the axis of movement of the piston. The vortices may be created by a device for attachment to the crown of a piston or by the configuration of the crown of the piston. The vortices may be created by a plurality of vanes extending outwardly from the center of the piston to the periphery thereof.
Abstract:
The invention refers to a cylinder (1) for a two-stroke, crankcase scavenged combustion engine, comprising an inlet pipe (10) for air/fuel mixture, at least one transfer port (17), and at least one outer connecting port (18) intended to be connected to a connecting duct (not shown), whereby the outer connecting port (18) is arranged so that it can be connected to the mentioned transfer port (17) via a piston ported air passage. The outer connecting port (18) is located below the inlet pipe (10) and at least one wall passage (14) extends from the mentioned outer connecting port (18), obliquely upwards through the cylinder wall, to at least one connecting port (16). This design enables the cooling air to flow freely around the cylinder above the inlet pipe (10), which improves the cooling of the cylinder.
Abstract:
A vehicle's fuel efficiency can be increased by reduce overall size and weight of the engine. A longer connecting rod results in higher block height which leads to larger engine height and thereby resulting into increased engine mass. The overall weight of the engine can by reduced by reducing length of connecting rod. Thus, for improving fuel economy, a combination of crank offset and reduced L/S ratio provides better results. This is achieved by providing a L/S ratio
Abstract:
A two-stroke engine (1) includes a crankcase (2), a cylinder (3) and a scavenging passage (11) extending through the crankcase (2) and the cylinder (3). The crankcase (2) includes a side wall (12) penetrated by a crankshaft (5). The side wall (12) includes a circular groove-shaped portion (13) that is extended along a rotation direction of the crankshaft (5) and is concaved in a direction of the crank axis. The groove-shaped portion (13) is covered by a lid (15) having a closure (16) to define the scavenging passage (11).