Abstract:
A variable flow reducing valve and distribution system is disclosed for compressed air injection engines operating on mono or dual energy with dual or triple supply mode and comprising a high pressure compressed air tank and a buffer capacity. The system can control the stroke of an engine piston and stop the piston at the dead centre. Moreover, the air supply in the buffer capacity and to the cylinders is controlled by pilot valves. A cam for the pilot valves is positioned directly on the flanges of a crankshaft and drives the rocker arm rods to pivot rocker arms around corresponding mobile shafts that can move between two ends of the rocker arms, thereby controlling lifting of the pilot valves according to the movement of the rocker arm rods.
Abstract:
An engine includes a housing having a combustion chamber. The engine may also include a fuel injector for supplying fuel directly or indirectly to the combustion chamber. Additionally, the engine may include an engine-lubricant-supply system operable to discharge engine lubricant onto the fuel injector.
Abstract:
The present invention relates to a method for fabricating a roller follower assembly, comprising the steps of fabricating a lash adjuster body, fabricating a roller follower body, fabricating a leakdown plunger, fabricating a socket, wherein at least one of the lash adjuster body, roller follower body, leakdown plunger, and socket is fabricated at least in part by forging.
Abstract:
A method for operating an engine in a vehicle, the engine having at least a cylinder, the method comprising generating engine braking torque to stop rotation of the engine in a desired range by opening and closing at least an electrically actuated valve of the cylinder more than once during a cycle of the cylinder.
Abstract:
A variable valve actuation mechanism actuates a valve of an internal combustion engine. The mechanism includes an actuator with a housing and a piston each moveable along a longitudinal axis in the engine. A cavity is defined between the piston and the housing. A body of fluid is disposed in the cavity and in the reservoir. A fluid passage has an open position wherein the cavity and reservoir are in fluid communication and a closed position wherein the cavity is sealed. When the passage is closed, the housing and piston move generally together. When the passage is open, fluid may pass from the cavity to the reservoir and movement of the housing relative to the piston changes the volume of the cavity.
Abstract:
The present invention relates to a valve lifter body, comprising an outer surface, enclosing a first cavity and a second cavity, wherein the first cavity includes a first inner surface configured to house a cylindrical insert, the second cavity includes a second inner surface cylindrically shaped, and at least one of the cavities is fabricated through forging.
Abstract:
An engine valve actuation system is provided. The engine valve actuation system includes an intake valve that is moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid. A cam assembly is configured to move the intake valve between the first position and the second position. A fluid actuator is configured to selectively prevent the intake valve from moving to the first position. A source of fluid is in fluid communication with the fluid actuator. A directional control valve is configured to control a flow of fluid between the source of fluid and the fluid actuator. A fluid passageway connects the directional control valve with the fluid actuator. An accumulator is in fluid communication with the fluid passageway. A restricted orifice is disposed between the accumulator and the fluid passageway to restrict a flow of fluid between the accumulator and the fluid passageway.
Abstract:
A force-transmitting arrangement (4) for a valve train (1) of an internal-combustion engine (2) is provided with hydraulic valve play compensation device (6) with a hollow cylindrical compensation piston (13). This borders, on one end, a working space (28) of the valve play compensation device (6) and, on the other end, a hydraulic medium reservoir (29), which is used for supplying the working space (32) and which is connected to a hydraulic medium supply (18) of the internal-combustion engine (2). Here, a run-off safety device (27) at least partially prevents a hydraulic medium flow from the hydraulic medium reservoir (29) in the direction of the hydraulic medium supply (23). The hydraulic medium reservoir (29) includes an inner storage space (15) enclosed by the compensation piston (13) and at least one outer storage space (52) located outside the compensation piston (13). The run-off safety device (27) is arranged as a component of the force-transmitting arrangement (4) between the hydraulic medium supply (23) and hydraulic medium reservoir (29).
Abstract:
A tappet comprises a foot having a convex cam contact surface and an axially extending hub, a tappet body having a lower body portion with a lower axial bore formed therein to receive the axially extended hub of the foot, and hydrocushions of oil between the foot, a thrust washer, and the lower portion of the tappet body. The cam contact surface operates in a frictional relationship with a cam lobe and the cam contact surface of the foot induces the foot to rotate about the centerline of the tappet. The hydrocushions of oil on each side of the thrust washer operate to reduce friction as the foot independently rotates axially about a centerline of the tappet body.
Abstract:
A compression-ignition internal combustion engine for aircraft generally comprises a stationary crankshaft, a crankcase adapted to rotate about the stationary crankshaft, and a plurality of cylinders radially extending from the crankcase. Each cylinder includes a piston adapted to reciprocate therein and a connecting rod drivingly coupling the piston to the crankshaft. The engine further comprises a valve assembly for operating an exhaust valve associated with each cylinder and a fuel assembly for supplying fuel to each cylinder. First and second cams mounted on the crankshaft are adapted to operate the valve assembly and fuel assembly in a timed manner as the crankcase rotates about the crankshaft. The engine also includes a propeller synchronizer for adjusting the pitch of a plurality of propellers radially extending from the rotating crankcase.