Title:
INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2016166551
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve a problem that in a conventional internal combustion engine, a cooling position cannot be changed appropriately corresponding to a knock generation position changing in accordance with a driving state.SOLUTION: An internal combustion engine in which a high tumble flow of intake air is formed in a combustion chamber 10a includes: a cooling passage 31 formed on a piston 24; an intake side inflow port and an exhaust side inflow port 32i, 32o formed on the piston to communicate with intake side regions and exhaust side regions 31i, 31o of the cooling passage and opened on a crank chamber 10b side; outflow ports 33i, 33o formed on the piston to communicate with the cooling passage to discharge lubricating oil 30 made to flow from the intake side inflow port and the exhaust side inflow port into the cooling passage to the crank chamber side; and lubricating oil supply switching means for supplying the lubricating oil from the intake side inflow port to the intake side regions of the cooling passage when engine speed Nis a threshold value Nor lower and supplying the lubricating oil from the exhaust side inflow port to the exhaust side regions of the cooling passage when the Nis higher than the N.SELECTED DRAWING: Figure 4
Inventors:
OMURA TETSUO
Application Number:
JP2015045878A
Publication Date:
September 15, 2016
Filing Date:
March 09, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02F3/22; F01M1/08; F01P3/08; F01P3/10; F16J1/09
Attorney, Agent or Firm:
Patent Business Corporation Tani/Abe Patent Office