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JPS55146221A - Secondary-air supplying system for motor cycle - Google Patents

Secondary-air supplying system for motor cycle

Info

Publication number
JPS55146221A
JPS55146221A JP5452979A JP5452979A JPS55146221A JP S55146221 A JPS55146221 A JP S55146221A JP 5452979 A JP5452979 A JP 5452979A JP 5452979 A JP5452979 A JP 5452979A JP S55146221 A JPS55146221 A JP S55146221A
Authority
JP
Japan
Prior art keywords
air
passage
exhaust
piston
exhaust passage
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
JP5452979A
Other languages
Japanese (ja)
Inventor
Shoichi Hirakawa
Mineo Yamamoto
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha 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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP5452979A priority Critical patent/JPS55146221A/en
Publication of JPS55146221A publication Critical patent/JPS55146221A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exhaust Gas After Treatment (AREA)

Abstract

PURPOSE: To protect an motor cycle against spoiling of its external appearance, by disposing a check valve in a member like carburetor or air-cleaner box constituting the intake passage instead of disposing the same in a secondary-air passage as in the conventional arrangements.
CONSTITUTION: When mixture is ignited and burnt and exhaust valve 17 is opened while piston 13 is being moved downward, combustion gas is discharged at a time into exhaust passage 16. Here, since most of combustion gas is discharged before piston 13 comes to the bottom dead point, excluding at the time of full-load operation of engine, partial vacuum or negative pressure is developed in combustion chamber 15 as the piston 13 is further moved downward. The partial vacuum is transmitted to the inside of exhaust passage 16 and check valve 27 attached to a member constituting intake passage 18 is opened, so that secondary air is supplied to exhaust passage 16 via secondary-air passage 22. Thus, oxidation of unburnt substances in combustion chamber 15 or exhaust passage 16 is promoted and the amount of air-polluting substances contained in the exhaust gas can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP5452979A 1979-05-02 1979-05-02 Secondary-air supplying system for motor cycle Pending JPS55146221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5452979A JPS55146221A (en) 1979-05-02 1979-05-02 Secondary-air supplying system for motor cycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5452979A JPS55146221A (en) 1979-05-02 1979-05-02 Secondary-air supplying system for motor cycle

Publications (1)

Publication Number Publication Date
JPS55146221A true JPS55146221A (en) 1980-11-14

Family

ID=12973182

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5452979A Pending JPS55146221A (en) 1979-05-02 1979-05-02 Secondary-air supplying system for motor cycle

Country Status (1)

Country Link
JP (1) JPS55146221A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131721A (en) * 1983-01-19 1984-07-28 Honda Motor Co Ltd Exhaust-gas purifying apparatus for internal-combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131721A (en) * 1983-01-19 1984-07-28 Honda Motor Co Ltd Exhaust-gas purifying apparatus for internal-combustion engine
JPH0514084B2 (en) * 1983-01-19 1993-02-24 Honda Motor Co Ltd

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