Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-06-12
2007-06-12
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090170, C123S090310
Reexamination Certificate
active
11286231
ABSTRACT:
A system for continuously varying valve-opening overlap in reciprocating internal combustion engines changes the path of the timing belt (16) that drives the intake valve camshaft (26). An idler wheel (44) mounted on a pivoted arm (48) turns against the timing belt. At low engine speeds, the sprocket wheel idles against the timing belt. At higher engine speeds, increased engine oil pressure causes a hydraulic cylinder (58) to force the sprocket wheel against the timing belt, changing its path. As the path of the belt is changed, the intake valve position is advanced with respect to the position of the crankshaft (12). The exhaust valve position remains the same relative to that of the crankshaft. Thus at above-idle speeds, intake-exhaust valve overlap is present. Since the amount of belt path deviation is related to engine oil pressure, and thus engine speed, valve overlap varies smoothly as a function of engine speed. A tensioner (30) maintains proper belt tensioning at all times.
REFERENCES:
patent: 1061098 (1913-05-01), McKeen
patent: 1220124 (1917-03-01), Hoffner
patent: 1358188 (1920-11-01), Brewer
patent: 1632223 (1927-08-01), Fey
patent: 1787717 (1931-01-01), Boulet
patent: 2060580 (1936-11-01), Chapelle
patent: 2121560 (1938-06-01), Duncan
patent: 2159017 (1939-05-01), Duncan
patent: 2191459 (1940-02-01), Duncan
patent: 2305787 (1942-12-01), Kales
patent: 2682260 (1954-06-01), Lantz
patent: 2685281 (1954-08-01), MacGregor
patent: 2804081 (1957-08-01), Gamble
patent: 2839036 (1958-06-01), Strang
patent: 2861557 (1958-11-01), Stolte
patent: 2890594 (1959-06-01), Hellmann
patent: 2969051 (1961-01-01), Webster
patent: 2980089 (1961-04-01), Sampietro
patent: 3004410 (1961-10-01), Pierce
patent: 3106195 (1963-10-01), Hanley
patent: 3144009 (1964-08-01), Goodfellow et al.
patent: 3301010 (1967-01-01), Vernick
patent: 3308797 (1967-03-01), Buyetti et al.
patent: 3369532 (1968-02-01), McIlroy
patent: 3401572 (1968-09-01), Bailey
patent: 3481314 (1969-12-01), Le Crenn
patent: 3499347 (1970-03-01), Pearson
patent: 3502059 (1970-03-01), Davis et al.
patent: 3516394 (1970-06-01), Nichols
patent: 3523485 (1970-08-01), Harrell
patent: 3633554 (1972-01-01), Nakajima et al.
patent: 3721220 (1973-03-01), Garcea
patent: 3800825 (1974-04-01), Seino et al.
patent: 3807243 (1974-04-01), Yada
patent: 3827413 (1974-08-01), Meacham
patent: 3888216 (1975-06-01), Miokovic
patent: 3888217 (1975-06-01), Hisserich
patent: 3945221 (1976-03-01), Miokovic
patent: 3945355 (1976-03-01), Calviac
patent: 3978829 (1976-09-01), Takahashi et al.
patent: 4091776 (1978-05-01), Clemens et al.
patent: 4096836 (1978-06-01), Kopich
patent: 4177773 (1979-12-01), Cribbs
patent: 4231330 (1980-11-01), Garcea
patent: 4302985 (1981-12-01), Natkin
patent: 4305352 (1981-12-01), Oshima et al.
patent: 4421074 (1983-12-01), Garcea et al.
patent: 4463712 (1984-08-01), Stojek et al.
patent: 4481912 (1984-11-01), Stwiorok et al.
patent: 4494495 (1985-01-01), Nakamura et al.
patent: 4494496 (1985-01-01), Nakamura et al.
patent: 4517934 (1985-05-01), Papez
patent: 4535731 (1985-08-01), Banfi
patent: 4545338 (1985-10-01), Allred
patent: 4561390 (1985-12-01), Nakamura et al.
patent: 4580533 (1986-04-01), Oda et al.
patent: 4627825 (1986-12-01), Bruss et al.
patent: 4696265 (1987-09-01), Nohira
patent: 4754727 (1988-07-01), Hampton
patent: 4762097 (1988-08-01), Baker
patent: 4805566 (1989-02-01), Ampferer
patent: 4811698 (1989-03-01), Akasaka et al.
patent: 4841924 (1989-06-01), Hampton et al.
patent: 4856465 (1989-08-01), Denz et al.
patent: 4873949 (1989-10-01), Fujiyoshi et al.
patent: 4889086 (1989-12-01), Scapecchi et al.
patent: 4895113 (1990-01-01), Speier et al.
patent: 4903650 (1990-02-01), Ohlendorf et al.
patent: 4967701 (1990-11-01), Isogai et al.
patent: 4974560 (1990-12-01), King
patent: 4976229 (1990-12-01), Charles
patent: 4986801 (1991-01-01), Ohlendorf et al.
patent: 4993370 (1991-02-01), Hashiyama et al.
patent: 4996955 (1991-03-01), Akasaka et al.
patent: 5002023 (1991-03-01), Butterfield et al.
patent: 5012773 (1991-05-01), Akasaka et al.
patent: 5031585 (1991-07-01), Muir et al.
patent: 5033327 (1991-07-01), Lichti et al.
patent: 5078647 (1992-01-01), Hampton
patent: 5080055 (1992-01-01), Komatsu et al.
patent: 5088456 (1992-02-01), Suga
patent: 5090366 (1992-02-01), Gondek
patent: 5097804 (1992-03-01), Brune et al.
patent: 5111780 (1992-05-01), Hannibal
patent: 5117784 (1992-06-01), Schechter et al.
patent: 5119691 (1992-06-01), Lichti et al.
patent: 5152263 (1992-10-01), Danieli
patent: 5156119 (1992-10-01), Suga
patent: 5159904 (1992-11-01), Ingold
patent: 5161493 (1992-11-01), Ma
patent: 5163872 (1992-11-01), Niemiec et al.
patent: 5172661 (1992-12-01), Brune et al.
patent: 5174253 (1992-12-01), Yamazaki et al.
patent: 5181485 (1993-01-01), Hirose et al.
patent: 5197421 (1993-03-01), Hara
patent: 5203290 (1993-04-01), Tsuruta et al.
patent: 5203291 (1993-04-01), Suga et al.
patent: 5219313 (1993-06-01), Danieli
patent: 5234088 (1993-08-01), Hampton
patent: 5326321 (1994-07-01), Chang
patent: 5327859 (1994-07-01), Pierik et al.
patent: 5329895 (1994-07-01), Nishida et al.
patent: 5333579 (1994-08-01), Hara et al.
patent: 5349929 (1994-09-01), Shimizu et al.
patent: 5355849 (1994-10-01), Schiattino
patent: 5361736 (1994-11-01), Phoenix et al.
patent: 5365896 (1994-11-01), Hara et al.
patent: 5365898 (1994-11-01), Mueller
patent: 5377638 (1995-01-01), Mueller
patent: 5381764 (1995-01-01), Fukuma et al.
patent: 5450825 (1995-09-01), Geyer et al.
patent: 5494009 (1996-02-01), Yamada et al.
patent: 5501186 (1996-03-01), Hara et al.
patent: 5542383 (1996-08-01), Clarke et al.
patent: 5553573 (1996-09-01), Hara et al.
patent: 5557983 (1996-09-01), Hara et al.
patent: 5592909 (1997-01-01), Tsuruta
patent: 5673659 (1997-10-01), Regueiro
patent: 5680836 (1997-10-01), Pierik
patent: 5680837 (1997-10-01), Pierik
patent: 5687681 (1997-11-01), Hara
patent: 5718196 (1998-02-01), Uchiyama et al.
patent: 5803030 (1998-09-01), Cole
patent: 5860328 (1999-01-01), Regueiro
patent: 5979382 (1999-11-01), Heer
patent: 6167854 (2001-01-01), Regueiro
patent: 6199522 (2001-03-01), Regueiro
patent: 6216655 (2001-04-01), Yoshiki et al.
patent: 6640760 (2003-11-01), Plasencia
patent: 6746352 (2004-06-01), Poiret et al.
patent: 6763792 (2004-07-01), Okamoto
Chang Ching
Pressman David
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