Abstract:
A four-stroke internal combustion engine for the otto and diesel cycle, characterized by incorporating a valve distribution for engines that use one or more ports near Bottom Dead Center. The four-stroke internal combustion engine comprises one or more cylinders each with a piston movable therein to define a combustion chamber and a port provided in a wall of each cylinder. The port is openable independently of an inlet valve and an exhaust valve to provide an additional route for the discharge of air or fuel/air mixture.
Abstract:
An intake and exhaust valve control apparatus includes a pair of valves rotatably disposed in a body mounted in association with a cylinder of an internal combustion engine. Each valve includes a through bore selectively disposed between ports in the body in fluid flow communication with the cylinder. Magnets of opposed polarity are mounted on one end of the valve. A magnetically coupled core and coil are associated with the magnets and are positioned to repel and attract certain of the magnets to rotate the valve between first and second positions when current flows in one of two directions in the coil and induces a magnetic field in the core. The coil is connected to a control module which supplies electric currents in opposed directions at predetermined times in the engine cycle to rotate the valves between fluid flow and fluid blocking positions with respect to the cylinder.
Abstract:
An improved rotary valve construction is provided for use in conjunction with an internal combustion engine of the type having a housing and at least one piston member reciprocally received within a cylinder formed in the housing. In the conventional fashion, fuel intake passage means formed within the housing communicate a combustible fuel mixture to the cylinder while, likewise, exhaust passage means formed in the engine housing expel exhaust gases from the cylinder. A first and second cylindrical valve member, each having a diametric throughbore, are rotatably mounted in the intake passage means and exhaust passage means, respectively. The valve members are rotatably driven in synchronism with the reciprocation of the piston in the cylinder to thereby open the intake and exhaust passage means via the valve member diametric bore at predetermined rotational positions of the valve members. Each valve member is rotatably provided in a valve member bore so that the rotary valve member and the bore have a space therebetween which allows a compressed fuel/air mixture to circulate therebetween, thereby providing cooling and lubrication for the valve by creating a gas bearing. Additionally, each valve member is selectively provided with narrow channels, either knurled or grooved, to thereby provide a labyrinth gland or seal. Ceramic bushings are provided in the bore opposite the channels. Optionally, carbon and rubber or plastic ring seals may be included on either side of each ceramic bushing.
Abstract:
An improved rotary valve assembly for use in internal combustion engines involving a two-piece cylinder head accommodating rotary intake valves and rotary exhaust valves mounted on independent shafts, operating at one-quarter speed of the crankshaft rotation with each of the rotary intake valves and rotary exhaust valves having two passageways for the introduction and interruption of fuel/air mixture into the cylinder and the evacuation and interruption of evacuation of the spent gases from the cylinder, respectively, the lubrication of the rotary valve assembly being by a drip feed through a longitudinal conduit in each respective shaft and radial conduits in each respective shaft in registration with the bearing means supporting the shaft within the cylinder head.
Abstract:
For charging the combustion chambers (10) provided with an inlet (14) and an outlet (16) valve of an IC engine of the piston type there is a charger (20) producing a continuous pressure and pumping into a storage space (28). In a way dependent on the ignition frequency of the associated combustion chambers (10) an air control valve (34) is opened and closed which is arranged between the storage space (28) and an inlet duct (36) leading to the inlet valve (14) of these combustion chambers (10). The phase relationship of the valve (34) to the inlet valve (14) may be changed in a way dependent on the required manner of operation of the engine between a position concentrating the air supply from the storage space (28) on the start of inlet and a position concentrating the supply on the end of inlet to such combustion chambers (10), each duct (40) supplying each combustion with non-compressed charge being shut off on the side of the combustion chamber to be supplied.
Abstract:
Intake and exhaust rotary valves (10, 10', 20; 110, 110', 120; 210, 210') are separately disposed in intake and exhaust passages (7, 7', 8, 8'; 107, 108) communicating with a combustion chamber (6; 106) in an internal combustion engine (1; 101), respectively, and are adapted to open and close the corresponding intake and exhaust passages. These rotary valves have spherical valve bodies (13, 13', 23; 113, 113', 123; 213, 213'). A valve operating system (30) for rotatively driving the valve bodies interlockingly with the movement of a piston (5; 105) in the internal combustion engine (1; 101) has drive shaft (34, 36; 134; 234) each of which is connected to the valve body through a connecting member (17, 18; 117, 118; 217, 218). In case a plurality of the intake and exhaust rotary valves are mounted, the valve bodies of the intake rotary valves as well as the valve bodies of the exhaust rotary valves are also interconnected through connecting members.
Abstract:
A variable valve timing mechanism for an internal combustion engine comprising at least one rotary valve (1) having at least two ports terminating as openings (2, 3) in its periphery, a cylinder head (7) having a bore in which the rotary valve (1) rotates, and a window (6) in the bore communicating with a combustion chamber (8). The openings (2, 3) successively align with the window (6) by virtue of the rotation. The mechanism also comprises a drive mechanism (13) driving the rotary valve (1). The at least two ports (2, 3) of the rotary valve (1) are an inlet port and an exhaust port. The drive mechanism (13) varies the angular velocity of the rotary valve (1) at least within a portion of at least one engine cycle whilst maintaining an average angular velocity over the at least one engine cycle that has a fixed relation to the average angular velocity of crankshaft over the at least one cycle.
Abstract:
An intermittent bypass system comprises an intake passage (22) leading to a cylinder (14) in an engine and an intake controller (10) connected to the intake passage (22) adjacent to the cylinder (14). The intake controller (10) enables, during different portions of the engine cycle, fluid flow from the intake passage (22) into the cylinder (14), fluid back-flow from the cylinder into the intake passage (22), and obstruction of fluid flow between the intake passage (22) and the cylinder (14). A check valve (24) is located in the intake passage (22) upstream of the intake controller (10) with the check valve (24) allowing fluid flow toward the cylinder (14) and obstructing fluid back-flow in the reverse direction. A bypass port (26) is located on the intake passage (22) to provide a flow path to a downstream portion (28) defined by the portion of the intake passage (22) between the check valve (24) and intake controller (10). A control valve (38) is connected between a secondary fluid source (36) and the bypass port (26) enabling communication between the secondary fluid source (36) and downstream portion (28) during a portion of the engine cycle when the pressure in the downstream portion (28) is less than the pressure in the secondary fluid source (36). The control valve (38) obstructs the communication during a portion of the engine cycle when the pressure in the downstream portion (28) is greater than the pressure in the secondary fluid source (36).