JPS54117842A - Four-cycle engine - Google Patents

Four-cycle engine

Info

Publication number
JPS54117842A
JPS54117842A JP2434878A JP2434878A JPS54117842A JP S54117842 A JPS54117842 A JP S54117842A JP 2434878 A JP2434878 A JP 2434878A JP 2434878 A JP2434878 A JP 2434878A JP S54117842 A JPS54117842 A JP S54117842A
Authority
JP
Japan
Prior art keywords
piston
oil
cylinder
bottom dead
dead point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2434878A
Other languages
Japanese (ja)
Other versions
JPS5749723B2 (en
Inventor
Hiroshi Yamaguchi
Hiroaki Kaneko
Toshihiro Nagano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Subaru Corp
Original Assignee
Fuji Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Heavy Industries Ltd filed Critical Fuji Heavy Industries Ltd
Priority to JP2434878A priority Critical patent/JPS54117842A/en
Publication of JPS54117842A publication Critical patent/JPS54117842A/en
Publication of JPS5749723B2 publication Critical patent/JPS5749723B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

PURPOSE: To reduce the slapping noise of a piston by forcibly supplying lubricating oil between the piston and the wall surface of the cylinder when the piston is located at the bottom dead point to thereby lubricate it with sufficient oil amount.
CONSTITUTION: When air intake and exhaust cams 13, 14 are rotated upon rotation of a cam shaft 12 driven synchronously with a crankshaft 6 upon operation of an internal combustion engine, tappets 15, 16 are reciprocated to open or close air intake and exhaust valves 8, 9. Oil pumps 22, 23 discharge lubricating oil upon interlocking with the valves 8, 9 in the vicinity of the bottom dead point of the piston 4 to supply the oil from lubricating oil inlets 19, 20 into a cylinder 3. This oil is supplied to between the skirt portion 4a of the piston 4 disposed at the bottom dead point and the wall surface of the cylinder 3 to form an oil film by the supplied oil to thereby control the inclindation of the piston 4 via the oil film when changing the moving direction of the piston. Thus, it can reduce the slapping noise of the piston.
COPYRIGHT: (C)1979,JPO&Japio
JP2434878A 1978-03-03 1978-03-03 Four-cycle engine Granted JPS54117842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2434878A JPS54117842A (en) 1978-03-03 1978-03-03 Four-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2434878A JPS54117842A (en) 1978-03-03 1978-03-03 Four-cycle engine

Publications (2)

Publication Number Publication Date
JPS54117842A true JPS54117842A (en) 1979-09-12
JPS5749723B2 JPS5749723B2 (en) 1982-10-23

Family

ID=12135679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2434878A Granted JPS54117842A (en) 1978-03-03 1978-03-03 Four-cycle engine

Country Status (1)

Country Link
JP (1) JPS54117842A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954717A (en) * 1982-09-24 1984-03-29 Akasaka Tekkosho:Kk Method of oiling timely cylinder of diesel engine
US5201805A (en) * 1992-04-06 1993-04-13 Hans Schubert Wear reducing piston for combustion engine
JP2016070073A (en) * 2014-09-26 2016-05-09 富士重工業株式会社 Oil pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954717A (en) * 1982-09-24 1984-03-29 Akasaka Tekkosho:Kk Method of oiling timely cylinder of diesel engine
JPH0240847B2 (en) * 1982-09-24 1990-09-13 Akasaka Tetsukosho Kk
US5201805A (en) * 1992-04-06 1993-04-13 Hans Schubert Wear reducing piston for combustion engine
JP2016070073A (en) * 2014-09-26 2016-05-09 富士重工業株式会社 Oil pump

Also Published As

Publication number Publication date
JPS5749723B2 (en) 1982-10-23

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