Fuel injection device and engine
A technology of fuel injection device and fuel injection valve, which is applied in the direction of fuel injection device, combustion engine, internal combustion piston engine, etc., can solve the problems of decreased working accuracy, timing of opening and closing, uneven period, viscosity change, etc., so as to improve work efficiency. The effect of precision
Active Publication Date: 2017-12-01
IHI CORP
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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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[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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A fuel injection device (128) is provided with: a hydraulic pump that discharges a hydraulic oil; a casing (146) to which a hydraulic chamber (174) connected to the hydraulic pump is provided; an operating piston (172) that is slidably provided inside the casing such that if the pressure inside the hydraulic chamber is below a preset threshold value, the operating piston is held in a standby position that maintains a fuel injection valve (160) in an open state, and if the pressure inside the hydraulic chamber is greater than or equal to the threshold value, the operating piston moves to an operating position that sets the fuel injection valve to the open state; and a bypass hole (180) that is formed in the operating piston and that, while the operating piston is held in the standby position, leads, to the hydraulic chamber, the hydraulic oil discharged from the hydraulic pipe, or drains, from the hydraulic chamber, the hydraulic oil led into the hydraulic chamber from the hydraulic pump.
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...
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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