Title:
VARIABLE VALVE TAPPET
Document Type and Number:
WIPO Patent Application WO/2018/053892
Kind Code:
A1
Abstract:
A variable valve tappet, comprising a tappet base (9) and a holder (12). The tappet base (9) is of a cylinder structure having a T-shaped hollow cylindrical groove provided on an upper portion thereof, and a tappet sleeve (14) being of a hollow cylinder structure is fit over the tappet base (9). The tappet further comprises a valve push rod base (16) being of a cylinder structure. An additional lift cavity (20) is formed between the lower surface of the valve push rod base (16) and the tappet base (9). The holder (12) is of a hollow cylindrical structure. The upper surface of the valve push rod base (16) extends outwards along the outer edge of the cylinder to match the inner surface of the holder (12), so that an oil storage cavity (17) is formed between the upper surface of the valve push rod base (16) and the inner surface of the holder (12). An oil pumping cavity (11) is formed among the outer surface of the holder (12), the inner surface of the tappet sleeve (14), and the tappet base (9). A tappet spring (19) is provided in the oil pumping cavity (11) outside the valve push rod base (16). The tappet sleeve (14) is provided with an oil inlet (8) connected to an oil supply system, and an oil return port (22) connected to an oil return system. The upper surface of the valve push rod base (16) is connected to a valve push rod (15). A cam (1) is provided directly below the tappet base (9). The variable valve tappet can achieve valve timing and lift control in operating situations where an engine have different speeds, and features low costs, high applicability, and high stability.
Inventors:
TIAN WEI (CN)
ZHAO JIAHUI (CN)
HAN ZHIQIANG (CN)
ZHANG XUN (CN)
LIU ZHI (CN)
ZHAO JIAHUI (CN)
HAN ZHIQIANG (CN)
ZHANG XUN (CN)
LIU ZHI (CN)
Application Number:
PCT/CN2016/102665
Publication Date:
March 29, 2018
Filing Date:
October 20, 2016
Export Citation:
Assignee:
UNIV XIHUA (CN)
International Classes:
F01L1/14; F01L1/12; F01L1/245; F01L1/25; F01L1/34
Foreign References:
| CN206071662U | 2017-04-05 | |||
| CN201588701U | 2010-09-22 | |||
| CN101479445A | 2009-07-08 | |||
| CN104564206A | 2015-04-29 | |||
| GB566959A | 1945-01-22 | |||
| GB627281A | 1949-08-04 | |||
| US4258671A | 1981-03-31 | |||
| EP0323591A2 | 1989-07-12 | |||
| JPS59147806A | 1984-08-24 | |||
| JPS54155309A | 1979-12-07 |
Attorney, Agent or Firm:
CHENGDU XINBO PATENT AGENCY COMPANY (CN)
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