Pulsation reducing system for fuel line
원문보기
IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0685535
(2003-10-16)
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| 우선권정보 |
JP-0303951 (2002-10-18) |
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발명자
/ 주소 |
- Serizawa, Yoshiyuki
- Tsuchiya, Hikari
- Hayashi, Koichi
- Ogata, Tetsuo
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| 출원인 / 주소 |
- Usui Kokusai Sangyo Kaisha Ltd.
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
7 인용 특허 :
9 |
초록
▼
A pulsation reducing system for a fuel line of an internal combustion engine, especially for an automotive engine equipped with an electronic fuel injection system is provided. The system includes a fuel delivery rail, a fuel tank, and a longitudinal main fuel pipe. A first flexible tube is arranged
A pulsation reducing system for a fuel line of an internal combustion engine, especially for an automotive engine equipped with an electronic fuel injection system is provided. The system includes a fuel delivery rail, a fuel tank, and a longitudinal main fuel pipe. A first flexible tube is arranged between the fuel delivery rail and the main fuel pipe. A second flexible tube is arranged between the main fuel pipe and the fuel tank. A small-ID tubular portion is arranged within the first tube or near the connecting portion of the first tube. The inside diameter of the small-ID tubular portion is smaller than that of the main fuel pipe. The length of the small-ID tubular portion is set between 10 to 50 times the inside diameter of the small-ID tubular portion itself. Thus, standing waves and resultant pressure pulsations caused by the fuel delivery rail are reduced by the small-ID tubular portion.
대표청구항
▼
1. In a pulsation reducing system for a fuel line of an electronic fuel injection type engine comprising a fuel delivery rail for supplying fuel to fuel injectors, a fuel tank, and a longitudinal main fuel pipe for connecting the fuel tank to the fuel delivery rail, said pulsation reducing system co
1. In a pulsation reducing system for a fuel line of an electronic fuel injection type engine comprising a fuel delivery rail for supplying fuel to fuel injectors, a fuel tank, and a longitudinal main fuel pipe for connecting the fuel tank to the fuel delivery rail, said pulsation reducing system comprising:a first flexible tube is arranged between said fuel delivery rail and said main fuel pipe, a second flexible tube is arranged between said main fuel pipe and said fuel tank, and a small-ID tubular portion arranged within said first tube or near a connecting portion of said first tube, the inside diameter of said small-ID tubular portion is smaller than that of said main fuel pipe, the length of said small-ID tubular portion is set between 10 to 50 times the inside diameter of the small-ID tubular portion itself, whereby standing waves and resultant pressure pulsations caused by said fuel delivery rail are reduced by said small-ID tubular portion. 2. A pulsation reducing system as claimed in claim 1, wherein the sectional flow area of said small-ID tubular portion is set between 5 to 40 percent of the sectional flow area of said main fuel pipe.3. A pulsation reducing system as claimed in claim 1, wherein said small-ID tubular portion is formed as a protrusion extending from an end of said fuel delivery rail.4. A pulsation reducing system as claimed in claim 1, wherein said small-ID tubular portion is formed into a pipe inserted within said first tube.5. A pulsation reducing system as claimed in claim 1, wherein said small-ID tubular portion is integrally formed within said first tube.6. A pulsation reducing system as claimed in claim 1, wherein said small-ID tubular portion is formed as a protrusion extending from the end of said main fuel pipe.7. A pulsation reducing system as claimed in claim 1, wherein said small-ID tubular portion is formed on said main fuel pipe.8. A pulsation reducing system as claimed in claim 1, wherein said small-ID tubular portion is formed as a protrusion extending inside of said fuel delivery rail.9. A pulsation reducing system as claimed in claim 1, wherein a quick-joint connector is connected to said first tube, and said small-ID tubular portion is formed within said quick-joint connector.10. A pulsation reducing flexible tube for a fuel line of an electronic fuel injection type engine comprising a fuel delivery rail for supplying fuel to fuel injectors, a fuel tank, and a longitudinal main fuel pipe for connecting the fuel tank to the fuel delivery rail, characterized in that:said flexible tube is provided with a first cavity at one end thereof for receiving an end of said main fuel pipe and a second cavity at the other end thereof for receiving an end of said fuel delivery rail, a small-ID tubular portion arranged between said first and second cavities so as to communicate with them, the sectional flow area of said small-ID tubular portion is set between 5 to 40 percent of the sectional flow area of said main fuel pipe; and the length of said small-ID tubular portion is set between 10 to 50 times the inside diameter of the small-ID tubular portion itself, whereby standing waves and resultant pressure pulsations caused by said fuel delivery rail are reduced by said small-ID tubular portion. 11. In a pulsation reducing quick-joint connector for a fuel line of an electronic fuel injection type engine comprising a fuel delivery rail for supplying fuel to fuel injectors, a fuel tank, and a longitudinal main fuel pipe for connecting the fuel tank to the fuel delivery rail, characterized in that:said connector is provided with a rugged surface at one end thereof for receiving an end of an elastic tube and a cavity at the other end thereof for receiving an end of a metallic or plastic tube, a small-ID tubular portion is arranged at the center of the rugged surface, the sectional flow area of said small-ID tubular portion is set between 5 to 40 percent of the sectional area of said main fuel pipe; and the length of said small-ID tubular portion is set between 10 to 50 times the inside diameter of the small-ID tubular portion itself, whereby standing waves and resultant pressure pulsations caused by said fuel delivery rail are reduced by said small-ID tubular portion.
이 특허에 인용된 특허 (9)
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Nakashima Tatsushi,JPX ; Okamoto Atsuya,JPX ; Takaki Niro,JPX, Accumulator fuel injection device.
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Tateishi Mataji (Nagasaki JPX) Kunimoto Etsuo (Nagasaki JPX) Takaishi Tatsuo (Nagasaki JPX), Fuel injection device.
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Egler Walter (Stuttgart DEX) Boehland Peter (Steinheim DEX), Fuel injection device for internal combustion engines.
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Popp Heinz (Roitham ATX), Fuel injection system for motor vehicles.
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Bertsch Richard (Asperg DEX) Gnther Dieter (Murr DEX) Knapp Heinrich (Leonberg DEX) Plapp Gunther (Filderstadtl DEX), Fuel supply line.
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Takanobu Kawano JP; Tohru Yoshinaga JP; Katsuyuki Tanaka JP; Kenji Kanehara JP; Yoshihiro Nakase JP; Masaki Takeyama JP; Yoichi Sugiura JP; Katsuhiko Aoyama JP; Toshio Imamura JP, Fuel supply system for relieving fuel pressure pulsations and designing method thereof.
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Nakashima Tatsushi (Nishio JPX) Furuhashi Tsutomu (Kariya JPX) Kano Hiroyuki (Nagoya JPX) Yamamoto Kazuo (Kariya JPX) Inoue Hiroshi (Chiryu JPX), Pressure supply device.
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Hafner Gregory G. (Normal IL) Huang Jeffrey C. (Peoria IL) Liu Xiangying (Ann Arbor MI), Tuned actuating fluid inlet manifold for a hydraulically-actuated fuel injection system.
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Jones Alan G. (Gloucestershire GB2) Harris Roger W. (Cheltenham GB2), Valve.
이 특허를 인용한 특허 (7)
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Matsuda, Yoshimoto, Engine for a vehicle and vehicle equipped with an engine.
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Kamada, Seiji; Kumagai, Hiroshi, Fluid coupling.
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Potter,Duane E.; Braun,Charles W., Fuel injector noise mufflers.
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Mueller, Norbert; Kannan, Venkatesh; Friedrich, Markus; Kramer, Jason L., In-line noise filtering device for fuel system.
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Watanabe, Atsushi; Badarinarayan, Harsha; Borg, Jonathan; Mccune, Donald J.; Shiraishi, Takuya; Hohkita, Atsushi; Soma, Masahiro; Saeki, Hiroaki, Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber.
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Watanabe, Atsushi; Hohkita, Atsushi; Soma, Masahiro; Saeki, Hiroaki, Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber.
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Watanabe,Atsushi; Badarinarayan,Harsha; Borg,Jonathan; McCune,Donald J.; Shiraishi,Takuya; Hohkita,Atsushi; Soma,Masahiro; Saeki,Hiroaki, Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber.
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