EP0169481A2 - Throttle valve assembly - Google Patents

Throttle valve assembly Download PDF

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Publication number
EP0169481A2
EP0169481A2 EP85108887A EP85108887A EP0169481A2 EP 0169481 A2 EP0169481 A2 EP 0169481A2 EP 85108887 A EP85108887 A EP 85108887A EP 85108887 A EP85108887 A EP 85108887A EP 0169481 A2 EP0169481 A2 EP 0169481A2
Authority
EP
European Patent Office
Prior art keywords
air
passageway
throttle valve
air passageway
fuel injection
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.)
Withdrawn
Application number
EP85108887A
Other languages
German (de)
English (en)
French (fr)
Inventor
Yoshiyuki Tanabe
Mineo Kashiwaya
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
Publication of EP0169481A2 publication Critical patent/EP0169481A2/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/043—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit upstream of an air throttle valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44

Definitions

  • This invention relates to a throttle valve assembly comprising a throttle valve, and a fuel injection valve and a thermal type air flowmeter located in a position upstream of the throttle valve.
  • One type of throttle valve assembly known in the art comprises a throttle valve and a fuel injection valve upstream of the throttle valve.
  • proposals have been made, as disclosed in Japanese Patent Application Laid-Open No. 73858/82, for example, to use another type of throttle valve assembly which comprises a thermal type air flowmeter in addition to the throttle valve and fuel injection valve.
  • an air passageway is splitted into two portions by a support arm supporting the fuel injection valve.
  • the thermal type air flowmeter has an outlet which opens in one of the two portions of the splitted air passageway.
  • This invention has as its object the provision of a throttle valve assembly which makes it possible to accurately determine at all times the flow rate of air flowing through the air passageway.
  • thermo type air flowmeter has outlets opening in the two portions of the splitted air passageway, respectively, so that the flow rates of air flowing through the two air passageway portions can be measured to obtain a correct value for the flow rate of air flowing through the air passageway.
  • Figs. 1 and 2 show the throttle valve assembly comprising one embodiment of the invention.
  • the throttle valve assembly comprises a main body 20, and an air passageway 12 formed in the main body 10.
  • a fuel injection valve 14 Located in the air passageway 12 is a fuel injection valve 14 supported by a support arm 16 comprising a pair of arm elements in which a fuel supply passageway and a fuel discharge passageway are formed for supplying a fuel to the fuel injection valve 14 and discharging the fuel therefrom.
  • a throttle valve 18 secured to a throttle valve stem 20 is disposed in the air passageway 12 in a position downstream of the fuel injection valve 14.
  • the support arm 16 and throttle valve stem 20 are superposed one above another so as to vertically align with each other as viewed in a direction of the air flow through the air passageway 12.
  • bypass passageway 22 Located parallel to the air passageway 12 is a bypass passageway 22 which is also formed in the main body 10.
  • the bypass passageway 22 has an inlet 24 opening in the air passageway 12 in a position upstream of the fuel injection valve 14, and at least two outlets 26A and 26B opening in an annular gap defined between the fuel injection valve 14 and a wall of the air passageway 12.
  • thermal type air flowmeter 28 Located midway in the bypass passageway 22 is a thermal type air flowmeter 28 which supplies an output to a monitoring circuit 30 to measure the rate of flow of air flowing through the bypass passageway 22.
  • the flow rate of air flowing through the air passageway 12 is determined and thus the amount of fuel to be injected through the fuel injection valve 14 is decided.
  • the outlets 26A and 26B of the bypass passageway 22 is positioned such that a line connecting the center of each of the outlets 26A and 26B with the center axis of the air passageway 12 and a line A-A extending through the center axis of the support arm 16 form an angle 6 equal to each other.
  • the degree of opening of the throttle valve 18 may vary depending on the condition of operation of the engine. For example, at high loads and at low loads, the degree of opening of the throttle valve 18 will show a variation because of a difference in the rpm. of the engine, even if the flow rate of air flowing through the air passageway 12 is the same.
  • the throttle valve assembly enables a substantially correct value to be obtained for the flow rate of air flowing through the air passageway 12 based on the output of the thermal type air flowmeter to thereby make it possible to obtain a correct value for the amount of fuel to be injected through the fuel injection valve 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Fuel-Injection Apparatus (AREA)
EP85108887A 1984-07-17 1985-07-16 Throttle valve assembly Withdrawn EP0169481A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP14686584A JPS6125928A (ja) 1984-07-17 1984-07-17 絞弁組立体
JP146865/84 1984-07-17

Publications (1)

Publication Number Publication Date
EP0169481A2 true EP0169481A2 (en) 1986-01-29

Family

ID=15417312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108887A Withdrawn EP0169481A2 (en) 1984-07-17 1985-07-16 Throttle valve assembly

Country Status (3)

Country Link
EP (1) EP0169481A2 (enrdf_load_stackoverflow)
JP (1) JPS6125928A (enrdf_load_stackoverflow)
KR (1) KR860001280A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218216A1 (en) * 1985-10-04 1987-04-15 Hitachi, Ltd. Intake air flow sensor
GB2196387A (en) * 1986-09-03 1988-04-27 Hitachi Ltd Aligning passages of i.c. engine throttle body parts
EP1580422A1 (en) * 2004-03-22 2005-09-28 Yamaha Hatsudoki Kabushiki Kaisha Fuel supply system and vehicle
US7216627B2 (en) 2005-03-18 2007-05-15 Toyota Jidosha Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7281517B2 (en) 2005-03-18 2007-10-16 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7296558B2 (en) 2005-03-18 2007-11-20 Yamaha Hatsudoki Kabushiki Kaisha Dual-injector fuel injection engine
US7299784B2 (en) 2005-03-18 2007-11-27 Toyota Jidosha Kabushiki Kaisha Internal combustion engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0248683U (enrdf_load_stackoverflow) * 1988-09-29 1990-04-04
JPH02140016U (enrdf_load_stackoverflow) * 1989-04-27 1990-11-22

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59170682U (ja) * 1983-05-02 1984-11-15 日本電子機器株式会社 内燃機関の混合気供給装置

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218216A1 (en) * 1985-10-04 1987-04-15 Hitachi, Ltd. Intake air flow sensor
GB2196387A (en) * 1986-09-03 1988-04-27 Hitachi Ltd Aligning passages of i.c. engine throttle body parts
US4790178A (en) * 1986-09-03 1988-12-13 Hitachi, Ltd. Intake structure of internal combustion engine with bypass intake passage for mounting air flow meter
EP1580422A1 (en) * 2004-03-22 2005-09-28 Yamaha Hatsudoki Kabushiki Kaisha Fuel supply system and vehicle
US7637242B2 (en) 2004-03-22 2009-12-29 Yamaha Motor Co., Ltd. Fuel supply system and vehicle
US7216627B2 (en) 2005-03-18 2007-05-15 Toyota Jidosha Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7281517B2 (en) 2005-03-18 2007-10-16 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7296558B2 (en) 2005-03-18 2007-11-20 Yamaha Hatsudoki Kabushiki Kaisha Dual-injector fuel injection engine
US7299784B2 (en) 2005-03-18 2007-11-27 Toyota Jidosha Kabushiki Kaisha Internal combustion engine

Also Published As

Publication number Publication date
KR860001280A (ko) 1986-02-24
JPS6125928A (ja) 1986-02-05
JPH0335510B2 (enrdf_load_stackoverflow) 1991-05-28

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19860701

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KASHIWAYA, MINEO

Inventor name: TANABE, YOSHIYUKI