JPS5557663A - Engine ignition time control system - Google Patents

Engine ignition time control system

Info

Publication number
JPS5557663A
JPS5557663A JP12844278A JP12844278A JPS5557663A JP S5557663 A JPS5557663 A JP S5557663A JP 12844278 A JP12844278 A JP 12844278A JP 12844278 A JP12844278 A JP 12844278A JP S5557663 A JPS5557663 A JP S5557663A
Authority
JP
Japan
Prior art keywords
negative pressure
chamber
application
chambers
ignition time
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
JP12844278A
Other languages
Japanese (ja)
Inventor
Isamu Arano
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12844278A priority Critical patent/JPS5557663A/en
Publication of JPS5557663A publication Critical patent/JPS5557663A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/05—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means
    • F02P5/10—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure
    • F02P5/103—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure dependent on the combustion-air pressure in engine

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

PURPOSE:To determine optimal ignition time in consideration of purification of exhaust gas and consumption of fuel, by using a conventional negavite pressure spark advancement characteristic as a reference and opening or closing a changeover valve to control the application of negative pressure to a second negative pressure chamber. CONSTITUTION:A first and a second negative pressure chambers 13, 27 are provided. These chambers differ in operation starting negative pressure level from each other. The displacements of diaphragms of the chambers are superposed on each other to determine the angle of ignition advancement. The first negative pressure chamber 13 of higher operation starting negative pressure level is connected to a negative pressure pick-out port 10, which is located upstream to a throttle valve provided in an air feed passage to an engine when the throttle valve is fully open. The second negative pressure chamber 27 is connected to the negative pressure pick-out port 10 through a changeover valve 35. The angle of advancement of ignition time in the application of negative pressure to both the first and the second negative pressure chambers 13, 27 is equal to the sum of that in the application of negative pressure to only the first chamber 13 and that in the application of negative pressure to only the second chamber 27.
JP12844278A 1978-10-20 1978-10-20 Engine ignition time control system Pending JPS5557663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12844278A JPS5557663A (en) 1978-10-20 1978-10-20 Engine ignition time control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12844278A JPS5557663A (en) 1978-10-20 1978-10-20 Engine ignition time control system

Publications (1)

Publication Number Publication Date
JPS5557663A true JPS5557663A (en) 1980-04-28

Family

ID=14984823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12844278A Pending JPS5557663A (en) 1978-10-20 1978-10-20 Engine ignition time control system

Country Status (1)

Country Link
JP (1) JPS5557663A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956378U (en) * 1982-10-08 1984-04-12 三菱自動車工業株式会社 Ignition timing control device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52100033A (en) * 1976-02-18 1977-08-22 Hitachi Ltd Negative-pressure operated device for internal combustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52100033A (en) * 1976-02-18 1977-08-22 Hitachi Ltd Negative-pressure operated device for internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956378U (en) * 1982-10-08 1984-04-12 三菱自動車工業株式会社 Ignition timing control device

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