Abstract:
A compression-release brake system comprises an exhaust rocker arm, an actuation piston slidable in a piston bore in the exhaust rocker arm so as to press an exhaust valve, a supply conduit formed within the exhaust rocker arm, and an exhaust valve reset device mounted to the exhaust rocker arm. The actuation piston defines an actuation piston cavity within the actuation piston bore between the piston bore and the actuation piston. The exhaust valve reset device includes a reset check valve disposed between the supply conduit and the actuation piston cavity to hydraulically lock the actuation piston cavity by closing the reset check valve when a pressure of the hydraulic fluid within the actuation piston cavity exceeds the pressure of the hydraulic fluid in the supply conduit. The reset check valve is biased closed by the pressure of the hydraulic fluid within the actuation piston cavity during the brake-on mode.
Abstract:
Self-cooled engine including a cylinder and cylinder head with a turbo-piston which freely reciprocates inside the cylinder. The cylinder head has a valve that achieves circumferential suction of air-fuel mixture into the cylinder. The valve mechanism is closed and opened by cylindrical cam by means of cam shaft. Circumferential suction of air-fuel mixture enables the cylinder to cool itself and to burn the fuel at the energy center effectively. An incoming stream of air-fuel mixture rotates the impeller on the piston which acts as a fan to cool the cylinder walls. The impeller blades deflect the flame from reaching the cylinder walls and acts as a thermal barrier between the energy center and cylinder walls. A high intensity compression swirl (HICS) is created at the end of the compression stroke to ensure that the fuel combustion is efficient and instantaneous release of maximum energy.
Abstract:
Vorgeschlagen ist ein Ventiltrieb (1) einer Brennkraftmaschine, mit einem über seinen Schaft (2) in einem Zylinderkopf (3) der Brennkraftmaschine geführten Gaswechselventil (4), welcher Schaft (2) von wenigstens einer Schraubendruckfeder (5) umfasst ist, die mit einem Ende (6) zumindest mittelbar auf eine Abstützung (7) des Zylinderkopfes (3) und mit einem anderen Ende (8) gegen einen mit dem Schaft (2) verbundenen Ventilteller (9) agiert, wobei das Gaswechselventil (4) an dessen Schaftende (10) von einem Nockenfolger beaufschlagbar ist und über seinen Ventilkopf (11) mit einem Sitz (12) des Zylinderkopfes (3) kommuniziert und wobei der Schraubendruckfeder (5) separate Kontaktmittel (13) zur Dämpfung deren Eigenschwingungen bei im Sitz (12) befindlichem Gaswechselventil (4) [gestreckte Schraubendruckfeder] zugeordnet sind.
Abstract:
A method of increasing oil pressure in a heavy duty truck engine lubricating system is provided. The lubricating system comprises an oil pressure regulating assembly (30) mounted in an oil filter base (14) and having a main spring (38) to regulate oil pressure, and a high pressure relief valve assembly (36) mounted in the oil filter base (14) and having a peak clipping spring (52) to relieve oil pressure when the pressure exceeds a specified limit. The method includes the steps of replacing the main spring (38) with a replacement main spring (38) having a higher spring constant and replacing the peak clipping spring (52) with a replacement peak clipping spring (52) having a higher spring constant. A replacement kit for increasing oil pressure is also provided.
Abstract:
A torque pulsated variable cam timing camshaft arrangement for a reciprocating piston, internal combustion engine is provided. The arrangement includes a sprocket. A torque pulsated phaser unit is operatively associated with the sprocket. A camshaft is operatively associated with the sprocket and the camshaft torsionally powers the phaser unit. The camshaft has a cam lobe engaged with a first cam follower for controlling a position of a spring biased valve. A spring biased second cam follower is engaged with the cam lobe providing a torsional input to the camshaft.
Abstract:
A split-cycle engine includes a crankshaft rotatable about a crankshaft axis. A compression piston is slidably received within a compression cylinder and operatively connected to the crankshaft such that the compression piston reciprocates through intake and compression strokes during a single rotation of the crankshaft. An expansion piston is slidably received within an expansion cylinder and operatively connected to the crankshaft such that the expansion piston reciprocates through expansion and exhaust strokes during a single rotation of the crankshaft. A crossover passage interconnects the expansion and compression cylinders. The crossover passage includes crossover compression (XovrC) and crossover expansion (XovrE) valves defining a pressure chamber therebetween. At least one of the XovrC and XovrE valves is a balanced valve. A fluid pressure balancer biases the valve for balancing fluid pressures acting against the valve in both opening and closing directions, reducing the forces required in actuating the valve.