Abstract:
Bei einem Verfahren zur Bestimmung eines Verschleißwerts eines zwischen einer Kurbelwelle und einer Nockenwelle einer Hubkolben-Verbrennungsmaschine angeordneten Übertragungselements, insbesondere einer Steuerkette oder eines Zahnriemens, wird die Nockenwelle über ein Antriebsteil, wie z.B. ein Nockenwellenzahnrad, von dem Übertragungselement angetrieben. An voneinander beabstandeten Zeitpunkten, an denen die Kurbelwelle die Nockenwelle antreibt, wird jeweils mindestens ein Messwert für die Phasenlage des Antriebsteils relativ zu der Kurbelwelle erfasst. Aus der Differenz zwischen diesen Messwerten wird der Verschleißwert ermittelt.
Abstract:
In an engine (10) having a rocker member (32) adapted to rock about an axis (36) intermediate the rocker member and a pushrod (44) extending from a lower body (34, 14) to an upper body (42, 34) and engaging an end of the rocker member (41), a gasket (48, 58) for sealing the lower body to the upper body is provided. The gasket (48, 54) includes a sealing portion (56, 58) adapted to substantially seal at least a portion of the upper body to the lower body, and a pushrod support portion (60) extending outwardly from the sealing portion (56, 58) adapted to engage the pushrod (44). At least a portion of the pushrod support portion (60) engaging the pushrod (44) is constructed from a material that is softer than the material of the pushrod.
Abstract:
In an engine (10) having a rocker member (32) adapted to rock about an axis (36) intermediate the rocker member and a pushrod (44) extending from a lower body (34, 14) to an upper body (42, 34) and engaging an end of the rocker member (41), a gasket (48, 58) for sealing the lower body to the upper body is provided. The gasket (48, 54) includes a sealing portion (56, 58) adapted to substantially seal at least a portion of the upper body to the lower body, and a pushrod support portion (60) extending outwardly from the sealing portion (56, 58) adapted to engage the pushrod (44). At least a portion of the pushrod support portion (60) engaging the pushrod (44) is constructed from a material that is softer than the material of the pushrod.
Abstract:
The invention relates to an internal combustion engine (1) comprising a housing (2) having at least one opening (4) into its inside, which is preferably the engine-oil feed inlet, and with a camshaft (5), mounted inside the housing for rotation about its geometric shaft. The camshaft (5) and the housing (2) have means cooperating with each other and with a device for locking a turnable shaft (6) with respect to the housing, insertable through this opening. In a second embodiment of the present invention, the device consists of a rod (6), the cooperating means in the housing consist in a bore (7) for receiving an end of the rod (6), and the cooperating means on the cam shaft consist of a notch (9) made in the surface of the shaft, which cooperates with the rod. In this way, when there is a need to adjust, repair and/or replace engine (1) components, the rod (6) is inserted through the opening (4) and locked in this bore (7) of the housing (2). In this position, the rod functions as a stop against said notch (9) in the plane surface of the camshaft (5), preventing it from turning about its axis. When this operation is finished, said rod (6) is removed from the housing (2) through the oil-feed opening (4), and the shaft (5) is unlocked. Additionally, the present invention relates to an engine housing (2), preferably for use with an internal combustion engine (1).
Abstract:
The invention relates to a reciprocating engine which is used between a minimum rotation speed Nmin and a maximum speed Nmax, comprising a turbocharging unit (2) which is dimensioned such as to operate autonomously when: (i) supplying air to the intake manifold (8) of the engine via a coolant, (ii) being supplied with gas by the exhaust manifold (9, CR and CT) of the engine at the exhaust temperature, and (iii) the turbine supply pressure (P3) is essentially equal to the compressor discharge pressure (P2). In this way, at a constant air temperature and with fixed geometry, the turbcharging system supplies an essentially-constant volume of cooled air Vc when the pressure varies, and volume Vc is essentially proportional to the discharge section Sd offered to the hot gases. The invention is characterised in that the turbine pressure (P3) is maintained essentially equal to the compressor pressure (P2) by an EGR bypass (3) between the intake manifold (8) and the exhaust manifold (9).
Abstract:
A camshaft for an internal combustion engine includes a cam lobe for actuating a valve. The cam lobe has an opening ramp profile that acts to loft the valve gear away from contact with the cam lobe to a maximum lift of the valve, with the valve gear returning to contact with a closing ramp of the cam lobe sufficiently in advance of a minimum cam lobe closing ramp height so as to dissipate enough closing energy of the valve to minimize valve bounce after the valve contacts a corresponding valve seat.
Abstract:
Die Erfindung betrifft eine Brennkraftmaschine mit einer Vorrichtung (1) zur hydraulischen Drehwinkelverstellung ihrer Nockenwelle (3) gegenüber ihrer Kurbelwelle sowie mit einer Vakuumpumpe (17) für einen Servoverbraucher. Die Vorrichtung (1) besteht aus einer mit der Kurbelwelle in Antriebsverbindung stehenden Antriebseinheit (6) und aus einer drehfest mit der Nockenwelle (3) verbundenen Abtriebseinheit (7). Als hydraulisches Druckmittel für die Vorrichtung (1) wird das aus einem der Radiallager (4) der Nockenwelle (3) im Zylinderkopf (5) entnommene Schmieröl der Brennkraftmaschine verwendet. Die Vakuumpumpe (17) besteht aus einem am Zylinderkopfdeckel (18) der Brennkraftmaschine angeflanschten Gehäuse (19) und aus einem darin angeordneten Rotor mit einer Antriebswelle (20), über welche der Antrieb der Vakuumpumpe (17) sowie deren Schmierung erfolgt. Erfindungsgemäss ist die Vakuumpumpe (17) axial gegenüber der Vorrichtung (1) angeordnet und die Vorrichtung (1) mit zusätzlichen Kupplungselementen ausgebildet, über welche die Antriebswelle (20) der Vakuumpumpe (17) mit der Vorrichtung (1) in Antriebsverbindung steht, wobei die Schmierung der Vakuumpumpe (17) mit dem der Vorrichtung (1) als Druckmittel zugeführten Schmieröl der Brennkraftmaschine erfolgt.