Title:
【発明の名称】内燃機関の可変バルブタイミング機構
Document Type and Number:
Japanese Patent JP3077621
Kind Code:
B2
Abstract:
A variable valve timing mechanism is provided at the distal end of a camshaft (14; 25; 39; 55) for changing a valve timing of an engine valve (77). A rotor (11; 22; 52) is fixed to the distal end face of the camshaft (14; 25; 39; 55), and the rotor has four vanes (112; 222; 522) protruding radially outward. A housing (12; 24; 54) is disposed to surround the rotor (11; 22; 52) to be rotatable relative to the rotor (11; 22; 52) and the camshaft (14; 25; 39; 55), and the housing (12; 24; 54) has recesses (122; 242; 542) on the inner circumference. Each recess (122; 242; 542) is divided by the vane (112; 222; 522) into a first pressure chamber (101) and a second pressure chamber (102). A first passage (145; 255; 555) is defined in the camshaft (14; 25; 39; 55), for supplying a hydraulic fluid pressure to the first pressure chamber (101) so as to change the rotational phase of the second rotor (12, 13; 21, 23, 24; 51, 53, 54) with respect to the camshaft (14; 25; 39; 55), and the first passage (145; 255; 555) has an opening at the distal end face of the camshaft (14; 25; 39; 55). A second passage (148; 258; 558) is defined in the camshaft (14; 25; 39; 55), for supplying a fluid pressure to the second pressure chamber (102) so as to change the rotational phase of the second rotor (12, 13; 21, 23, 24; 51, 53, 54) with respect to the camshaft (14; 25; 39; 55), and the second passage (148; 258; 558) has an opening at outer circumference (149; 231) of the camshaft (14; 25; 39; 55).
Inventors:
Kazuhisa Mampei
Tatsuo Iida
Ken Asakura
Tatsuo Iida
Ken Asakura
Application Number:
JP6412397A
Publication Date:
August 14, 2000
Filing Date:
March 18, 1997
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F01L3/14; B21D22/21; B21K1/22; B23P15/00; F01L1/34; F01L1/344; F01L3/02; F01L3/20; F02D13/02; F16D3/10; (IPC1-7): F01L1/34
Domestic Patent References:
| JP7238806A | ||||
| JP6346707A | ||||
| JP6317119A | ||||
| JP666165A | ||||
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| JP8121123A | ||||
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Other References:
【文献】国際公開95/31633(WO,A1)
Attorney, Agent or Firm:
Hironobu Onda