Abstract: A method of manufacturing a gas sensor includes a step of preparing an assembly including a sensor element, a metal cylindrical body through which the sensor element penetrates in an axial direction, and a protection cover that is attached to the cylindrical body and that covers one end side of the sensor element. The method also includes steps of arranging a coil in a periphery of at least a portion of the cylindrical body at the same side as the other end of the sensor element with respect to the protection cover to avoid the protection cover of the assembly, induction heating the portion of the cylindrical body where the coil is arranged in the periphery by applying current to the coil, and hence removing oil adhering to the portion.

Abstract: An internal combustion engine (10) with variable valve timing has one or more valve shafts (38, 44) connected to stepper motors (54) for angularly positioning the one or more valve shafts (38, 44) relative to an engine block (12). Flow passages (50, 52) are formed into the one or more valve shafts (38, 44) for passing intake air and exhaust gases into and from the engine (10). Sensors (58, 60 and 62) are located adjacent a crankshaft (28) and the one or more valve shafts (38, 44) for determining crankshaft positions and valve shaft positions relative to the engine block (12). An engine control unit (56) receives crank shaft and valve shaft position signals and emits control signals to the stepper motors (54) to selectively operate the engine in two stroke, four stroke, six stroke, eight stroke, and ten stroke modes.

Abstract: The object of the present invention is to provide a fluid rotary machine in which dead spaces can be reduced as much as possible even if the machine is enlarged by arranging rotary valves directly behind cylinder chambers. The fluid rotary machine in which first and second double-headed pistons (7, 8) intersecting within a case body (1, 2) move linearly back and forth within cylinders (16) due to the hypocycloid principle along with rotation of shafts (4a, 4b) and in which intake and exhaust cycles are repeated in chambers (22), wherein cylinder heads (17) for closing the cylinder chambers (22) are each provided with rotary valves (19) which are rotated by drive transmission from the shafts (4a, 4b) and which are provided with intake holes and discharge holes (19b) alternately communicated with the cylinder chambers (22) via communication channels (20a, 20b), and the rotary valves (19) intersect longitudinal axis of the opposing pistons (7, 8) and are capable of rotating parallel with output axil lines.

Abstract: A rotary valve internal combustion engine has a piston connected to a crankshaft and reciprocatable in a cylinder, a combustion chamber being defined in part by the piston, and a rotary valve rotatable in a valve housing fixed relative to the cylinder, the rotary valve having a valve body containing a volume defining, in part, the combustion chamber and further having a port giving, during rotation of the valve, fluid communication successively to and from the combustion chamber via inlet and exhaust ports.

Abstract: An exhaust control device for a vehicle engine includes an exhaust control valve capable of changing the opening area of an exhaust passage. The exhaust control valve is disposed in exhaust passage forming means so as to be able to change a bent-internal side partial passage sectional area of the passage sectional area of an exhaust passage. Specifically the exhaust control valve is disposed at a bent portion of the exhaust passage that is closest to an exhaust valve port. With this configuration, the exhaust flow rate can be controlled satisfactorily.

Abstract: An apparatus and method for controlling charge motion in the air intake manifold includes a barrel-style valve rotatably mounted in the lower air intake manifold between the linearly arranged set of air inlets and the first and second sets of laterally offset air outlets which branch to the first and second cylinder banks, respectively. The barrel valve includes a plurality of openings and is rotatable between a fully open position wherein the plurality of openings are in alignment with the respective air inlets and outlets in the lower manifold allowing substantially unimpeded airflow therethrough, and fully closed position wherein the plurality of openings are substantially fully out of alignment with the respective air inlets and outlets substantially preventing air flow therethrough while allowing air flow through an air bypass formed adjacent to each air inlet and outlet pair.

Abstract: The invention concerns an internal combustion engine in which, instead of conventional valves, a rotary slide valve (1) for opening and closing at least one gas exchange opening is assigned to each cylinder (33, 34). The rotary slide valve (1) is provided in the form of a double-walled tube with two channels (40, 44), which are separated from one another, for leading away exhaust gases and for supplying air or a fuel vapor mixture, whereby the channels are provided with radial channels (41, 42, 38, 45, 46) that directly lead to openings on the outer lateral surface of the rotary slide valve (1) and, depending on the rotational position, connect one or more of the cylinders (33, 34) to the intake or exhaust channels (10, 11).

Abstract: A valve system for a combustion engine that includes at least one combustion chamber is disclosed. The combustion chamber includes an intake port and an exhaust port. The valve system includes cylindrical valve shaft, the cylindrical valve shaft having a cylindrical surface, a central axis along the cylindrical valve shaft and containing at least two recessed areas, the recessed areas being at one hundred eighty degrees to one another along the axis of the valve shaft, the recessed areas extending approximately ninety degrees about the axis and along the cylindrical surface, or about 25 percent of the surface.

Abstract: Methods, devices, and systems for power generation through liquid piston internal combustion engine. The liquid piston internal combustion engine of the invention utilizes a novel, synergetic combination of internal combustion and steam piston engines within the framework of one and the same system. The engine may comprise a plurality of cylinders, each having a liquid piston.

Abstract: A valve system for a combustion engine that includes at least one combustion chamber is disclosed. The combustion chamber includes an intake port and an exhaust port. The valve system includes cylindrical valve shaft, the cylindrical valve shaft having a cylindrical surface, a central axis along the cylindrical valve shaft and containing at least two recessed areas, the recessed areas being at one hundred eighty degrees to one another along the axis of the valve shaft, the recessed areas extending approximately ninety degrees about the axis and along the cylindrical surface, or about 25 percent of the surface.

Abstract: The invention refers to a valve device for a combustion engine which includes a combustion chamber (1) and at least one channel (5) for communication between the combustion chamber (1) and an external space. The valve device includes a rotatable valve body (13), which is provided in said channel (5) and includes a passage (14) extending in a direction through said valve body (13). The valve body (13), which is rotatable around an axis of rotation forming an angle to the direction (p) of said passage (14), is arranged to open and close, respectively, said channel (5) by means of said passage (14) by rotation, a rotary motor (16) separated from the combustion engine is provided.

Abstract: A complete rotary valve assembly and system is disclosed. The rotary valve includes a generally elongated valve body having first and second ends and a longitudinally extending axis of rotation. The rotary valve is mounted in a housing positioned above a head port of an engine. The rotary valve includes an intake port and an exhaust port defined by a valve body arranged for periodic communication with the head port and combustion chamber as the valve rotates along the axis of rotation. The rotary valve system of the present invention includes a secondary intake port for controlling the flow of intake gases into the rotary valve, a fuel injection system, an improved sealing system, a bifurcated valve body with separated intake and exhaust passages, a cooling and reduced emissions gas exhaust control system, and an adjustable throttle control.

Abstract: A complete rotary valve assembly and system is disclosed. The rotary valve includes a generally elongated valve body having first and second ends and a longitudinally extending axis of rotation. The rotary valve is mounted in a housing positioned above a head port of an engine. The rotary valve includes an intake port and an exhaust port defined by a valve body arranged for periodic communication with the head port and combustion chamber as the valve rotates along the axis of rotation. The rotary valve system of the present invention includes a secondary intake port for controlling the flow of intake gases into the rotary valve, a fuel injection system, an improved sealing system, a bifurcated valve body with separated intake and exhaust passages, a cooling and reduced emissions gas exhaust control system, and an adjustable throttle control.