Fuel delivery pipe

A fuel delivery and fuel technology, which is applied in low-pressure fuel injection, fuel injection devices, liquid fuel engines, etc., can solve the problems of strong pulsation propagation and high manufacturing costs, and achieve the goals of improving layout, reducing vibration and noise, and reducing manufacturing costs Effect

Inactive Publication Date: 2006-08-30
USUI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, due to the above-mentioned patent document 1 Figure 4 And the opening of the fuel introduction pipe of Patent Document 3 is located near the node of the primary mode of the standing wave, so the propagation of the primary mode of the standing wave can be suppressed as described above. However, since the opening of the fuel introduction pipe is located at the same time Near the antinode of the secondary wave pattern of the standing wave, the pulsation propagation of the secondary wave pattern of the standing wave is strong, and the vibration and noise near 1kHz caused by this secondary wave pattern of the standing wave become a problem
Furthermore, as shown in Patent Document 3, when the fuel inlet pipe is bent into an L-shape to improve layout, an L-shaped intermediary member for connecting to the fuel inlet pipe is required, so there is a manufacturing cost. high disadvantage

Method used

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Experimental program
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Embodiment 1

[0065] Referring to Fig. 1, Embodiment 1 of the fuel delivery pipe of the present invention is described in detail. Reference numeral 1 is the main body of the fuel delivery pipe, and its cross-sectional shape perpendicular to the direction of the pipe axis is a flat rectangular shape. And, the fuel delivery pipe main body 1 is constituted by the following parts: an upper wall 2 and a bottom wall 3 arranged in the pipe axis direction; a pair of side walls 4, 5 connecting the above-mentioned upper wall 2 and bottom wall 3; A pair of end walls 6, 7 configured at both ends. In addition, the total length of the upper wall 2 and the bottom wall 3 in the longitudinal direction is 320 mm, and the length in the width direction is 34 mm.

[0066] In addition, the height of the side walls 4 and 5 is 10.2 mm, and the plate thickness of the upper wall 2, the bottom wall 3 and the side walls 4 and 5 of the fuel delivery pipe main body 1 is 1.2 mm. In addition, a plurality of sleeves 8 are...

Embodiment 2

[0073] In addition, in the first embodiment described above, on the assumption that the overall length of the interior of the fuel delivery pipe main body 1 in the longitudinal direction is 100°, the fuel introduction pipe 10 is arranged so as to be inserted into the fuel delivery pipe main body 1 at a position where the length is 25°. , and connected to the main body of the fuel delivery pipe 1, while in embodiment 2, as Figure 5 As shown, the fuel inlet pipe 10 is configured to be inserted into the fuel delivery pipe main body 1 at a position of length 75 .

[0074] By inserting the fuel introduction pipe 10 into the inside of the fuel delivery pipe main body 1 at a position as long as the above, as Image 6 As shown, the opening 11 of the fuel introduction pipe 10 is disposed near the middle of the antinode and the node of the standing wave primary mode, and is also disposed at the node of the standing wave secondary mode generated inside the fuel delivery pipe main body 1...

Embodiment 3

[0076] In addition, in the above-mentioned Embodiments 1 and 2, assuming that the total length of the interior of the fuel delivery pipe main body 1 in the longitudinal direction is 100, the fuel introduction pipe 10 is arranged to be inserted into the interior of the fuel delivery pipe main body 1 by 25 and 75 lengths respectively. position and connected to the main body of the fuel delivery pipe 1, and in embodiment 3, as Figure 7 As shown, the fuel inlet pipe 10 is configured to be inserted into the fuel delivery pipe main body 1 at a position with a length of 33 .

[0077] By arranging the fuel introduction pipe 10 to be inserted into the interior of the fuel delivery pipe main body 1 at the length position as described above, as Figure 8 As shown, since the opening 11 of the fuel inlet pipe 10 is far away from the antinode of the standing wave primary mode, it is also far away from the antinode of the standing wave secondary mode, so it can comprehensively suppress the ...

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Abstract

The objective of the invention is to provide a fuel delivery pipe having high installation layout performance, and reducing manufacturing cost, while restraining propagation of a standing wave primary mode and a standing wave secondary mode, by connecting a fuel introducing pipe in the longitudinal direction to the inside from one end part of a fuel delivery body for forming a flexible absorbing wall surface on a wall surface. This fuel delivery pipe forms the flexible absorbing wall surface on the wall surface, has an injection nozzle, connects the fuel introducing pipe 10 to the one end part of the returnless type fuel delivery body 1 without a return circuit to a fuel tank, and connects this fuel introducing pipe 10 to the fuel tank via an underfloor pipe. When the total length in the longitudinal direction inside of the fuel delivery body 1 is set to 100, the fuel introducing pipe 10 is inserted inside the fuel delivery body 1 up to a position of 15 to 35 or 65 to 85, and is connected and fixed to the fuel delivery body 1.

Description

technical field [0001] The present invention relates to a fuel delivery pipe provided with an absorbing wall on an electronic fuel injection type automobile engine for the purpose of reducing vibration and noise caused by fuel pressure pulsation caused by fuel injection. Background technique [0002] Conventionally, there is known a fuel delivery pipe that supplies fuel such as gasoline to a plurality of cylinders of an engine by providing a plurality of nozzles. This kind of fuel delivery pipe injects the fuel introduced from the fuel tank through the pipeline under the floor into the multiple intake pipes or cylinders of the engine in sequence from multiple nozzles to mix the fuel with air, and by burning this mixture, Generates the output power of the engine. [0003] The fuel delivery pipe has a return type fuel delivery pipe and a non-return type fuel delivery pipe, and in the case of supplying excess fuel from the fuel tank, the return type fuel delivery pipe has a ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/02
CPCF02M55/04F02M55/025F02M69/465F02M2200/315F04B33/00F04B39/0005F04B39/1033F04B39/122F04B53/143
Inventor 芹泽由之
Owner USUI CO LTD
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