Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
2000-01-18
2000-09-19
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Tappet
123 9019, 123 9046, 123 9051, F01L 124, F01L 108
Patent
active
061196444
ABSTRACT:
A hydraulic clearance compensation element actuated by a cam of a camshaft and adapted for use with a valve drive, includes a casing closed on one end by a bottom which bears upon one end of a gas exchange valve, a pressure piston so received in the interior of the casing that a leakage gap for hydraulic fluid is formed between an outer surface area of the pressure piston and an adjacent side wall of the casing for enabling the clearance compensating function. The pressure piston and the casing are movable relative to one another in axial direction, with a high pressure chamber being defined between the bottom and a confronting end face of the pressure piston for receiving a hydraulic fluid. In order to provide the leakage gap of optimum size over the entire temperature range adjacent structural components of the pressure piston and the casing in the area of the leakage gap are configured in accordance with the following equation: ##EQU1## wherein C is a characteristic ratio number,
REFERENCES:
patent: 2941523 (1960-06-01), Bergmann
patent: 2942595 (1960-06-01), Bergmann
patent: 3542001 (1970-11-01), Line
patent: 3598095 (1971-08-01), Ayres
patent: 4876996 (1989-10-01), Mayer et al.
patent: 4878462 (1989-11-01), Kurisu et al.
patent: 4909198 (1990-03-01), Shiraya et al.
patent: 4942854 (1990-07-01), Shirai et al.
patent: 5237967 (1993-08-01), Willermet et al.
patent: 5647310 (1997-07-01), Kimura et al.
Patent Abstracts of Japan, vol. 008, No. 104 (M-296), May 16, 1984 & JP 59 015614 A (Atsugi Jidoushiya Buhin KK), Jan. 26, 1984.
MTZ Motortechnische Zeitschrift, vol. 41, No. 12, Dec. 1980, Schwabisch Gmund, Germany, pp. 539-542, XP002037013 Klaus Daniel: "Hydraulischer Ventilspielausgleich-Aufbau, Funktion, Entwicklungsgrundlagen".
Feiereisen Henry M.
Ina Walzlager Schaeffler OHG
Lo Weilun
LandOfFree
Hydraulic clearance compensation element does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic clearance compensation element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic clearance compensation element will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1061836