Title:
HYDRAULIC CIRCUIT FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2015/115450
Kind Code:
A1
Abstract:
A hydraulic circuit is provided with a second oil pump (21) which serves as a dedicated pump for supplying hydraulic pressure to VVT mechanisms (23, 24). The exhaust-side VVT mechanism (24) has a rotor and a return spring which, during the stop of an engine, causes the rotor to be held at the most advanced ignition timing position. Drive force for the second oil pump (21) is obtained from an exhaust-side camshaft (26) to which the rotor is connected. As a result of this configuration, an increase in torque required for operating the exhaust-side VVT mechanism (24) can be minimized by the pressing force of the return spring.
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Inventors:
KUSANAGI HIDEAKI (JP)
Application Number:
PCT/JP2015/052272
Publication Date:
August 06, 2015
Filing Date:
January 28, 2015
Export Citation:
Assignee:
MIKUNI KOGYO KK (JP)
International Classes:
F01L1/356; F01M1/02; F01M1/06; F02D13/02
Foreign References:
| JP2013204769A | 2013-10-07 | |||
| JPH10252434A | 1998-09-22 | |||
| JP2004060572A | 2004-02-26 | |||
| JP2011157833A | 2011-08-18 | |||
| JP2005061261A | 2005-03-10 | |||
| JP3507649B2 | 2004-03-15 | |||
| JP3368785B2 | 2003-01-20 |
Other References:
See also references of EP 3101241A4
Attorney, Agent or Firm:
TACHIBANA, KAZUYUKI (JP)
Mandarin orange tree Kazuyuki (JP)
Mandarin orange tree Kazuyuki (JP)
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