Title:
Engine hydraulic control system
Document Type and Number:
Japanese Patent JP6296119
Kind Code:
B2
Abstract:
A hydraulic control system for an engine having a plurality of cylinders includes: valve stop mechanisms that switch the engine from all-cylinder operation to cylinder cut-off operation; a VVT that can change the timing to open and close valves 14 during all-cylinder operation and cylinder cut-off operation; an oil pump that supplies oil to hydraulically operated devices including the valve stop mechanisms and the VVT through a hydraulic path; and a control device. The control device controls a maintaining oil pressure, which is required to maintain the operated state of the valve stop mechanisms during cylinder cut-off operation, so that the maintaining oil pressure is set to a high value in a high oil viscosity region.
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Inventors:
Nishimoto Toshiro
Hashimoto
Hashimoto
Application Number:
JP2016163852A
Publication Date:
March 20, 2018
Filing Date:
August 24, 2016
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
F02D13/02; F01L1/356; F01M1/16
Domestic Patent References:
| JP2015194132A | ||||
| JP2004239209A | ||||
| JP2011256724A |
Attorney, Agent or Firm:
Maeda patent office
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