公开(公告)号：DE19733027A1

公开(公告)日：1999-02-04

申请号：DE19733027

申请日：1997-07-31

Applicant: SCHAEFFLER WAELZLAGER OHG

Inventor： BRAEUNIG WALTER ,  ELGAS ULRICH

IPC: F01L1/24 ,  F01L1/255

Abstract: The hydraulic valve play compensation system is used for an internal combustion motor. The compensation system includes a holding cap (8) fitted to the adjustment piston (4). A radial holding projection (10) engages a groove (11) around the piston which has been shaped without cutting. The groove is formed by displacement of metal at the piston.

公开(公告)号：DE69311547T2

公开(公告)日：1998-06-04

申请号：DE69311547

申请日：1993-03-17

Applicant: SIEMENS AUTOMOTIVE CORP LP

Inventor： ROBNETT JAMES ,  MOLITOR MARK

IPC: F01L1/14 ,  F01L1/16 ,  F01L1/24 ,  F01L1/255 ,  F01L9/02 ,  F01L13/00

Abstract: A damping mechanism for a lost motion hydraulic actuator utilizes a thin edge orifice in cooperation with a communication passageway between the upper and lower chambers controls the damping of the upper piston on closure. The upper piston is operatively connected to the engine valve of an internal combustion engine. A communication port from the upper chamber to the communication passageway is closed off as the upper piston returns to its normal position forcing the flow of the hydraulic fluid through the thin edge orifice. In this manner the viscosity of the hydraulic fluid does not control the damping of the actuator and the noise factor is substantially reduced.

公开(公告)号：DE3238981A1

公开(公告)日：1983-07-07

申请号：DE3238981

申请日：1982-10-21

Applicant: STANADYNE INC

Inventor： LESHER KENNETH W

IPC: F01L1/14 ,  F01L1/24 ,  F01L1/245 ,  F01L1/255

公开(公告)号：GB2108620A

公开(公告)日：1983-05-18

申请号：GB8228057

申请日：1982-10-01

Applicant: NISSAN MOTOR

Inventor： NAKAMURA MAKOTO

IPC: F01L1/24 ,  F01L1/255

Abstract: A hydraulic lifter has an upper plunger member and a lower plunger member slidably received in a bore of a casing. A reservoir chamber is formed in the upper and lower plunger members for receiving hydraulic fluid, and a pressure chamber is formed between a blind bottom end of the casing and the bottom of the lower plunger. Both chambers are fluidly connected through a check valve. In order to vent air in the reservoir chamber and thereby to prevent air from entering the pressure chamber, there is formed in the upper plunger member at least one air vent hole located above a fluid inlet of the reservoir chamber. There is further formed a fluid passage between the upper plunger and the lower plunger for allowing fluid in the clearance between the casing and the plunger members to return to the reservoir chamber. This fluid passage may comprises a plurality of radially extending grooves formed either in the face of the bottom end of the upper plunger or in the face of the top end of the lower plunger.

公开(公告)号：IT8249410D0

公开(公告)日：1982-11-02

申请号：IT4941082

申请日：1982-11-02

Applicant: STANADYNE INC

Inventor： LESHER KENNETH W

IPC: F01L1/14 ,  F01L1/24 ,  F01L1/245 ,  F01L1/255 ,  F01L

公开(公告)号：GB2082718A

公开(公告)日：1982-03-10

申请号：GB8125396

申请日：1981-08-20

Applicant: FORD MOTOR CO

IPC: F01L1/18 ,  F01L1/255 ,  F01L1/20

Abstract: A method of assembling a valve train in an internal combustion engine, which valve train comprises a camshaft (5), an hydraulic tappet (6), a valve rocker (1), a sliding contact element (9) fixed to one arm of the rocker (1) and effecting sliding contact between the hydraulic tappet (6) and the valve rocker (1). and a poppet valve (7) actuated by the other arm of the valve rocker, the method comprising the steps of (a) grading a supply of sliding contact elements (9) into a plurality of tolerance range groups corresponding to the amount by which the sliding contact elements would space the said one arm of the valve rocker from the hydraulic tappet, (b) assembling the camshaft (5), hydraulic tappet (6), valve rocker (1), and poppet valve (7) on the internal combustion engine, (c) measuring the gap (Y) between the said one arm and the hydraulic tappet which should be occupied by the sliding contact element, (d) selecting a sliding contact element (9) from the tolerance groups corresponding most closely to the measured gap, and (e) securing the selected sliding contact element (9) in the valve rocker (1) without disassembling the valve train.

公开(公告)号：DE2843918C2

公开(公告)日：1980-12-18

申请号：DE2843918

申请日：1978-10-09

Applicant: FORD-WERKE AG, 5000 KOELN

Inventor： TRZOSKA, PETER REINHOLD, 5000 KOELN

IPC: F01L1/255 ,  F01L1/24

Abstract: A hydraulic tappet includes a tubular cylinder sideable within a bore of a housing, a piston with a reservoir slideably mounted within the tubular cylinder, a lower piston spring biased away from the piston with the reservoir forming a pressure chamber therebetween. The reservoir being in open communication with pressure oil ports and the pressure chamber selectively being closed or open to said reservoir. The closing or opening of the pressure chamber being controlled by the lower piston and cylinder riding on tracks of a cam which control the relative position of the cylinder and lower piston.

公开(公告)号：DE2843918A1

公开(公告)日：1980-04-10

申请号：DE2843918

申请日：1978-10-09

Applicant: FORD WERKE AG

Inventor： TRZOSKA PETER REINHOLD

IPC: F01L1/255 ,  F01L1/24

Abstract: A hydraulic tappet includes a tubular cylinder sideable within a bore of a housing, a piston with a reservoir slideably mounted within the tubular cylinder, a lower piston spring biased away from the piston with the reservoir forming a pressure chamber therebetween. The reservoir being in open communication with pressure oil ports and the pressure chamber selectively being closed or open to said reservoir. The closing or opening of the pressure chamber being controlled by the lower piston and cylinder riding on tracks of a cam which control the relative position of the cylinder and lower piston.

公开(公告)号：GB1275531A

公开(公告)日：1972-05-24

申请号：GB87571

申请日：1971-01-07

Applicant: JOHNSON PRODUCTS INC

IPC: F01L1/255

Abstract: 1275531 Hydraulic tappet JOHNSON PRODUCTS Inc 7 Jan 1971 [7 May 1970] 875/71 Heading F2K [Also in Division F1] An hydraulic tappet for an overhead camshaft I.C. engine has a push rod shorter than the body of the tappet with part-spherical ends to allow relative swivelling between the rod and the tappet plunger and the rocker arm respectively. An open ended tappet body 32 has a plunger 38 having seat 62 for a part-spherical end of a push rod 82 having its other end 84, of smaller diameter, fitting in a socket 86 of a rocker arm 12. The spherical engagement ends of the push rod allows swivelling to compensate for the arcuate path taken by the end of the rocker arm. Lubrication is effected through passageways 18, 36, 40 into the reservoir 46 of the plunger 38, which is closed by a check valve of a plate 52 and spring 50, and thence through metering means 60 comprising ridges 66, 70 and a metering disc 72 with apertures 74 to an opening 64 and thence to a passageway 89. The oil in the reservoir 46 holds the push rod 82 in constant contact with the rocker arm while sufficient pressure retracts the plunger 38 by oil passing the check valve 50, 52.

公开(公告)号：DE112020000266T5

公开(公告)日：2021-09-09

申请号：DE112020000266

申请日：2020-01-15

Applicant: CATERPILLAR INC

Inventor： QU RONG ,  COFFEY CHARLES F

IPC: F01L1/255 ,  F01L1/14 ,  F01L1/24

Abstract: Ein hydraulisches Spielausgleichselement (30) umfasst eine sich in Längsrichtung erstreckende Schubstange (34) mit einem proximalen Ende und einem distalen Ende sowie einen Hohlraum (36), der sich an dem distalen Ende befindet, und einen Kolben (32), der in dem Hohlraum (36) aufgenommen wird. Der Kolben (32) umfasst ein internes Reservoir (44) und einen Fluidpfad zu dem internen Reservoir (44). Der Fluidpfad umfasst einen Längskanal (52) und einen Radialkanal (54).