Patent application number | Description | Published |
20090107427 | Roller tappet for internal combustion piston engines comprising an anti-rotation device - An internal combustion piston engine comprising at least one cylinder head, said cylinder head closing at least one cylinder, inlet and outlet channels of said cylinder head being regulated, each one, by at least one inlet and outlet valve that is loaded by a closing spring, said inlet and outlet valves being activated by roller tappets ( | 04-30-2009 |
20090145391 | SWITCHING ELEMENT FOR A VALVE TRAIN OF AN INTERNAL COMBUSTION ENGINE - The invention proposes a switching element ( | 06-11-2009 |
20090255495 | Method of Variable Valve Timing in an Internal Combustion Engine - A method of variable valve timing in an internal combustion engine in which the valve opening and closing timing of the actuated gas exchange valves of the internal combustion engine can be varied as a function of engine speed by adjusting means for adjusting at least one camshaft relative to a crankshaft, said internal combustion engine comprising hydraulic valve lash adjusters for adjusting a valve lash of the gas exchange valves, said lash adjusters being configured at least on one of an inlet side and an outlet side as idle stroke elements which, when actuated, at first produce an engine speed-dependent idle stroke and to provide a method of variable valve timing for internal combustion engines comprising a camshaft adjustment and a hydraulic valve adjustment with an idle stroke function that guarantees favorable valve timing in all operational situations of the internal combustion engine and, at the same time, improves the thermodynamic exploitation of such internal combustion engines, at each adjustment of the at least one camshaft, the respective idle stroke of the valve lash adjusters is taken into account. | 10-15-2009 |
20090314237 | SWITCHABLE BUCKET TAPPET - A switchable bucket tappet for a valve drive of an internal combustion engine, which has a bucket base body with a ring-shaped base guided by a skirt projecting from the outer edge of the base, in a bore of the engine. A lifting cam acts on the base and a hollow cylindrical extension projects from an inner edge of the base. In the bore, an inner body is axially movable relative to the bucket base body and, formed in the underside of the inner body, is a support for indirect contact with a gas exchange valve. A coupling piston, which has a flattened portion on its upper side, runs in a bore of the inner body and is engaged with a driver surface for full valve lift. A lost motion spring acts between the bucket base body and inner body. | 12-24-2009 |
20100037845 | HYDRAULIC SUPPORT ELEMENT FOR A SWITCHABLE CAM FOLLOWER OF A VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE - A hydraulic support element for a switchable cam follower of a valve drive of an internal combustion engine, which has a pot-like housing with a bore, a pressure piston formed in one piece with an external casing and head projecting over an edge of the housing and a high pressure space for a hydraulic medium. The high pressure space is supplied, via a non-return valve from a first reservoir space, which is fed via first passages in the housing and pressure piston. A second reservoir space is formed in the pressure piston axially above the first reservoir space and is filled by second passages in the housing and pressure piston. From the second reservoir space a hydraulic medium is conducted to the cam follower via an opening in the head. The reservoir spaces are separated by a ball around which the internal wall of the pressure piston is wrapped | 02-18-2010 |
20110220052 | INTERNAL COMBUSTION PISTON ENGINE WITH AN ADJUSTABLE INFLATING ELEMENT - An internal combustion piston engine based on a four-stroke process, having a crankcase in which at least one cylinder/piston assembly is arranged, the piston being guided by a connecting rod connected to a crankshaft. At least one cylinder head ( | 09-15-2011 |
20110220062 | INTERNAL COMBUSTION PISTON ENGINE WITH A COMPRESSION RELIEF ENGINE BRAKE - An internal combustion piston engine based on a four-stroke process, including a crankcase in which at least one cylinder/piston assembly is arranged, the piston being guided by a connecting rod connected to a crankshaft. At least one cylinder head closes the cylinder, each of whose intake and exhaust channels are controlled by at least one intake valve and one exhaust valve ( | 09-15-2011 |
20110232603 | RECIPROCATING-PISTON INTERNAL COMBUSTION ENGINE WITH ENGINE BRAKE AND ADDITIONAL OPENING OF AN EXHAUST VALVE - A four-stroke internal combustion engine, having a brake controller by which pressure is built up in the exhaust system and/or at least one exhaust valve is additionally opened is provided. A hydraulic valve clearance compensation element is incorporated in at least one transmission element between the camshaft and at least one intake and exhaust valve and has at least one piston ( | 09-29-2011 |
20120167847 | ASSEMBLY FOR A VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE - An assembly for a valve drive of an internal combustion engine, which has a hydraulic support element and a cam follower connected by way of a clamp. The follower rests on one end via a cap on a spherical head of a pressure piston of the support element. The piston extends in a bore of a housing of the support element. The clamp flanks the cap with holding strips along the sides. The inner sides run in a guide zone on the outer shell of the piston. The housing has an opening for hydraulic fluid that can be conducted between the housing and the piston through at least one passage in the piston to a storage chamber. The guide zone on the piston is also designed as an anti-rotation mechanism therefore. The piston is installed in a defined manner and is torsionally oriented in relation to the cam follower. | 07-05-2012 |
20130000573 | HYDRAULIC VALVE PLAY COMPENSATING ELEMENT FOR RECIPROCATING-PISTON INTERNAL COMBUSTION ENGINES - A reciprocating-piston internal combustion engine which operates on the four-stroke cycle, having a crankcase and having at least one cylinder which is arranged in said crankcase and in which a piston is guided by a crankshaft, having at least one cylinder head which closes off the cylinder and the intake and exhaust channels which are controlled by at least in each case one intake and exhaust valve loaded by a valve spring, which intake and exhaust valves can be actuated by transmission elements driven by a camshaft, and having a hydraulic valve play compensating element ( | 01-03-2013 |
20130306009 | VALVE TRAIN ACTUATING DEVICE FOR AN INTERNAL COMBUSTION ENGINE - A valve train actuating device for an internal combustion engine including a lever-type cam follower and a hydraulic support element for supporting the cam follower is provided. The hydraulic support element includes at least one piston guided in a housing ( | 11-21-2013 |
20130319358 | VALVE DRIVE WITH ADDITIONAL LIFT IN THE CAM BASE CIRCLE - A valve drive of an internal combustion engine, having a finger lever which acts at one end on a gas exchange valve and which is seated at the other end on a head of a housing of a support element, which housing runs in an axially movable manner in a reception bore of a cylinder head, the finger lever is acted on by a cam from the base circle from which there projects in a fixed manner an additional cam piece for generating an additional lift of the gas exchange valve, a bore extends from a bottom of the housing in the direction of the head, in the lower portion of which bore there runs a pressure piston which is axially movable relative to the housing and via the lower face of which the support element is mounted on a base of the reception bore of the cylinder head, a high-pressure chamber for hydraulic medium is formed between an upper face of the pressure piston and a ring part situated above said upper face and which is fixed with respect to the housing, and to generate the additional lift, the high-pressure chamber is flooded with hydraulic medium such that the housing is deployed relative to the pressure piston, supported on the hydraulic medium column accumulated in the high-pressure chamber, and to deactivate the additional stoke, the hydraulic medium in the high-pressure chamber is discharged such that the housing is retracted. | 12-05-2013 |
20140245981 | CAM FOLLOWER - A cam follower for actuating at least one gas exchange valve of an internal combustion engine is provided, including a cam contact roller that is supported by a plain bearing on a pin ( | 09-04-2014 |