JPS5578146A - Closed loop air/fuel ratio control device for lpg engine - Google Patents

Closed loop air/fuel ratio control device for lpg engine

Info

Publication number
JPS5578146A
JPS5578146A JP15116078A JP15116078A JPS5578146A JP S5578146 A JPS5578146 A JP S5578146A JP 15116078 A JP15116078 A JP 15116078A JP 15116078 A JP15116078 A JP 15116078A JP S5578146 A JPS5578146 A JP S5578146A
Authority
JP
Japan
Prior art keywords
pressure
fuel gas
chamber
mixer
lpg
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
JP15116078A
Other languages
Japanese (ja)
Inventor
Hisatoku Moriya
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.)
Automob Antipollut & Saf Res Center
Automobile Appliance Anti Pollution and Safety Research Center
Original Assignee
Automob Antipollut & Saf Res Center
Automobile Appliance Anti Pollution and Safety Research Center
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 Automob Antipollut & Saf Res Center, Automobile Appliance Anti Pollution and Safety Research Center filed Critical Automob Antipollut & Saf Res Center
Priority to JP15116078A priority Critical patent/JPS5578146A/en
Publication of JPS5578146A publication Critical patent/JPS5578146A/en
Pending legal-status Critical Current

Links

Landscapes

  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To make it possible to operate stable air/fuel ratio control over the entire region of operation, high and low, of the engine, by the structure wherein a mixer of the variable venturi system is adopted, and the fuel gas pressure to be drawn into the mixer is controlled by a pressure higher than atmospheric pressure.
CONSTITUTION: LPG from bomb 1 passes through pipe 7 and enters primary chamber 13 of vaporizer 10 and gasifies. When the pressure of this fuel gas becomes higher than a specified pressure, the coil spring of atmosphere chamber 14 is compressed and No.2 diaphragm 17 is pressed down. By this, valve seat 19 is made to approach the open end of pipe 7 by means of a lever, and thereby the amount of LPG is reduced. Fuel gas whose pressure is set slightly higher than atmospheric pressure is drawn into secondary chamber 12 through a small hole provided on partitioning plate 16. At this time, the pressure is adjusted by valve seat 8, which is moved corresponding to the negative pressure in negative pressure chamber 11. Subsequently, fuel gas flows from nozzle 23 of variable venturi type mixer 20 into venturi unit 22 and is mixed with intake air.
COPYRIGHT: (C)1980,JPO&Japio
JP15116078A 1978-12-08 1978-12-08 Closed loop air/fuel ratio control device for lpg engine Pending JPS5578146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15116078A JPS5578146A (en) 1978-12-08 1978-12-08 Closed loop air/fuel ratio control device for lpg engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15116078A JPS5578146A (en) 1978-12-08 1978-12-08 Closed loop air/fuel ratio control device for lpg engine

Publications (1)

Publication Number Publication Date
JPS5578146A true JPS5578146A (en) 1980-06-12

Family

ID=15512648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15116078A Pending JPS5578146A (en) 1978-12-08 1978-12-08 Closed loop air/fuel ratio control device for lpg engine

Country Status (1)

Country Link
JP (1) JPS5578146A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672824A1 (en) * 1994-03-14 1995-09-20 Yamaha Hatsudoki Kabushiki Kaisha Gas-fuelled engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672824A1 (en) * 1994-03-14 1995-09-20 Yamaha Hatsudoki Kabushiki Kaisha Gas-fuelled engine
US5755203A (en) * 1994-03-14 1998-05-26 Yamaha Hatsudoki Kabushiki Kaisha Charge-forming system for gaseous fueled engine

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