Diesel engine variable injection timing adjusting device

Abstract

The invention discloses a diesel engine variable injection timing adjusting device which comprises an installation frame, an oblique tooth connection shaft, an adjusting inner gear ring, a timing gear, a hydraulic executing mechanism, a controller and an adjusting inner gear ring mobile scale. The installation frame is located on the top of a machine frame of a diesel engine, one end of the oblique tooth connection shaft is supported in one end of the installation frame, one end of a cam shaft is fixedly connected with one end of the oblique tooth connection shaft, the other end of the obliquetooth connection shaft is engaged with the adjusting inner gear ring, one end of the adjusting inner gear ring is supported in one end of the installation frame, the timing gear is fixed to the otherend of the adjusting inner gear ring, one end of a piston rod of the hydraulic executing mechanism is fixedly connected with the other end of the adjusting inner gear ring through multiple adjustingscrews, two cavities of a hydraulic cylinder barrel are connected with an electromagnetic reversing valve, signal lines at the two ends of the electromagnetic reversing valve are connected with a controller, and the adjusting inner gear ring mobile scale is arranged outside one end of the executing mechanism. The diesel engine variable injection timing adjusting device is high in integration degree, compact in structure, safe, reliable, capable of carrying out active adjusting under overall working conditions, and capable of being conveniently added to the diesel engine.

Description

technical field [0001] The invention relates to a diesel motor fuel injection regulating device, in particular to a variable fuel injection timing regulating device suitable for marine high-power medium-speed diesel engines, and belongs to the technical field of diesel engines. Background technique [0002] With the increasingly stringent emission regulations of the International Maritime Organization and the increasingly fierce competition in the marine diesel engine industry, the domestic and foreign markets have more and more requirements for improving the performance of marine high-power (≥1000kW) medium-speed (300~1000r / min) diesel engines and reducing emission pollution. getting higher and higher. According to the principle of diesel engine, the fuel injection timing of diesel engine is to accurately control the opening of fuel pump through transmission parts such as sprocket, timing gear, camshaft and cam light, so as to ensure that the engine injects fuel according t...

AI Technical Summary

Problems solved by technology

However, the resulting fuel injection timing is a fixed value, which is a compromise choice under the full working conditions of the diesel engine, and cannot meet the performance requirements of the diesel engine under the full working conditions, resulting in the diesel engine being effective under partial load conditions. The power is reduced, the emission performance is deteriorated, and the requirements of relevant regulations cannot be met

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