Title:
LUBRICATION OIL CIRCUIT FOR ENGINE
Document Type and Number:
Japanese Patent JP2021148070
Kind Code:
A
Abstract:
To effectively secure oil supply amount to a piston by using a simple configuration.SOLUTION: A lubrication oil circuit for an engine includes: a storage part 41; an upstream side flow passage 42; a pump 43 pumping up oil; downstream side flow passages 44, 46, 47; an oil jet 50 capable of injecting oil toward a piston PS; a first valve 52 provided in the downstream side flow passage 47; a relief flow passage 45 branched from the downstream side flow passage 44 and returning oil to the storage part 41; a second valve 51 provided in the relief flow passage 45; an operating state acquisition part 110 acquiring an operating state of the engine 10; and a control part 120 controlling an opening of the second valve 51 to an opening side to reduce oil pressure in the downstream side flow passage 46 when the acquired operating state is in a high-rotation or high-load operating region, and controlling the opening of the second valve 51 to a closing side to increase the oil pressure in the downstream side flow passage 46 when the acquired operating state is in a low-rotation or low-load operating region.SELECTED DRAWING: Figure 1
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Inventors:
HASHIMOTO MUNEMASA
Application Number:
JP2020049384A
Publication Date:
September 27, 2021
Filing Date:
March 19, 2020
Export Citation:
Assignee:
ISUZU MOTORS LTD
International Classes:
F01M1/16; F01M1/08; F01P3/08