JPS54135921A - High compression internal combustion engine - Google Patents

High compression internal combustion engine

Info

Publication number
JPS54135921A
JPS54135921A JP4369678A JP4369678A JPS54135921A JP S54135921 A JPS54135921 A JP S54135921A JP 4369678 A JP4369678 A JP 4369678A JP 4369678 A JP4369678 A JP 4369678A JP S54135921 A JPS54135921 A JP S54135921A
Authority
JP
Japan
Prior art keywords
combustion chamber
volume
internal combustion
piston
compression ratio
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.)
Pending
Application number
JP4369678A
Other languages
Japanese (ja)
Inventor
Kunio Hasegawa
Kenichi Inoguchi
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.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co 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 Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP4369678A priority Critical patent/JPS54135921A/en
Publication of JPS54135921A publication Critical patent/JPS54135921A/en
Pending legal-status Critical Current

Links

Landscapes

  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

PURPOSE: To prevent abnormal combustion in high load range and improve engine power and fuel comsumption by increasing the volume of a combustion chamber according to engine load and making the compression ratio lower than the initial set value.
CONSTITUTION: An internal combustion engine includes a cylinder head 2 involving an intake port 3 and exhaust port 4, a piston 5 reciprocating in a cylinder block 1, and a combustion chamber 6 whose volume is set to have the compression ratio 9.5 or more with a piston 5 at TDC. An expansion room 10 with a volume Vn is formed in the cylinder head 2 in communication with a combustion chamber 6. A constantly closed valve 12 loaded by a spring 11 is equipped at the opening of the expansion room 10 to allow communication with the combustion chamber 6. When section negative pressure in an intake manifold 7 rises over a certain value, the valve 12 is opened by a cam 13 turned by a driving mechanism 15.
COPYRIGHT: (C)1979,JPO&Japio
JP4369678A 1978-04-12 1978-04-12 High compression internal combustion engine Pending JPS54135921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4369678A JPS54135921A (en) 1978-04-12 1978-04-12 High compression internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4369678A JPS54135921A (en) 1978-04-12 1978-04-12 High compression internal combustion engine

Publications (1)

Publication Number Publication Date
JPS54135921A true JPS54135921A (en) 1979-10-22

Family

ID=12670986

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4369678A Pending JPS54135921A (en) 1978-04-12 1978-04-12 High compression internal combustion engine

Country Status (1)

Country Link
JP (1) JPS54135921A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5986311U (en) * 1982-12-03 1984-06-11 篠塚　正男 internal combustion engine
JPS5990044U (en) * 1982-12-09 1984-06-18 本田技研工業株式会社 Internal combustion engine with variable compression ratio mechanism
US4538569A (en) * 1982-03-01 1985-09-03 Nissan Motor Company, Limited Compression control system for an internal combustion engine and control method therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538569A (en) * 1982-03-01 1985-09-03 Nissan Motor Company, Limited Compression control system for an internal combustion engine and control method therefor
JPS5986311U (en) * 1982-12-03 1984-06-11 篠塚　正男 internal combustion engine
JPS5990044U (en) * 1982-12-09 1984-06-18 本田技研工業株式会社 Internal combustion engine with variable compression ratio mechanism

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