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Fuel injection device and engine

A technology of fuel injection device and fuel injection valve, which is applied in the directions of fuel injection device, combustion engine, internal combustion piston engine, etc., can solve the problems of decreased working accuracy, viscosity change, uneven opening and closing timing, period, etc., to improve working accuracy. Effect

Active Publication Date: 2019-09-20
IHI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the viscosity of the working oil changes, causing unevenness in the timing and period of opening and closing of the fuel injection valve, and the operating accuracy may decrease.

Method used

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  • Fuel injection device and engine
  • Fuel injection device and engine
  • Fuel injection device and engine

Examples

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Embodiment Construction

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Dimensions, materials, other specific numerical values, and the like shown in this embodiment are merely illustrations for facilitating the understanding of the invention, and do not limit the invention unless otherwise specified. In this specification and the drawings, elements having substantially the same function and structure are given the same reference numerals to omit repeated description, and illustration of elements not directly related to the present invention is omitted.

[0017] figure 1 It is a figure explaining the whole structure of the single-flow scavenging type two-cycle engine 100. The single flow scavenging type two-cycle engine 100 (engine) of this embodiment is used for ships etc., for example. Specifically, the single-flow scavenging dual-cycle engine 100 is composed of a pressure cylinder 110, a piston 112, an exhaust port 11...

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PUM

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Abstract

A fuel injection device (128), having an oil pressure pump, shell (146), working piston (172), bypass hole (180), the aforementioned hydraulic pump will discharge the working oil, the foregoing shell (146) is provided with an oil pressure chamber (174), the aforementioned hydraulic chamber (174) is connected to the hydraulic pump, the aforementioned working piston (172) is freely placed in the shell, in the case of insufficient pressure in the pressure chamber predetermined threshold, the foregoing working piston is maintained in the fuel injection valve (160) Maintain the standby position of the open valve state, if the pressure in the oil pressure chamber is above the threshold, the above working piston is moved to the working position of the fuel injection valve in the open valve state, the aforementioned bypass hole (180) is formed in the working piston, during the working piston is maintained in the standby position, the working oil discharged from the hydraulic pump will be guided to the hydraulic chamber, or the working oil will be directed from the hydraulic pump to the hydraulic chamber from the hydraulic chamber.

Description

technical field [0001] The present invention relates to a hydraulically driven fuel injection device and an engine including a working piston operated by hydraulic pressure. [0002] This application claims priority based on Japanese Patent Application No. 2015-96718 filed in Japan on May 11, 2015, the content of which is incorporated herein by reference. Background technique [0003] The engine is provided with a fuel injection device for supplying fuel to the combustion chamber. For example, as described in Patent Document 1, in a hydraulically driven fuel injection device, hydraulic pressure of working oil acts on a hydraulic chamber, thereby pushing a piston. Then, by the transition of the piston, the fuel injection valve is opened and closed, thereby controlling the supply or stop of fuel. [0004] Patent Document 1: Japanese PCT Publication No. 2001-527614. [0005] However, in a hydraulically driven fuel injection device, the oil pressure chamber is filled with ope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M47/04F02M37/00F02M43/00
CPCF02M37/00F02M47/04F02M63/0028F02M63/0078F02M47/046F02B25/04F16K31/1221F16K31/1226F02M63/0033F02M21/0251Y02T10/30F02M43/00
Inventor 山田刚梅本义幸广濑孝行寺本润
Owner IHI CORP