Oil injection timing control policy of diesel engine double-swirl combustion system

Abstract

The invention provides an oil injection timing control system aiming at a double-swirl combustion system and a control policy thereof. The invention has the advantages that fuel jets under different working conditions and a double-swirl combustion chamber 2 are matched and optimized by using a modern precise control technology, and an oil injection advance angle is exactly controlled; under an idle speed and a small load, an injection starting point is a function of the oil injection quantity and the rotating speed of the diesel engine and is obtained through a demarcated pulse spectrum, and under a large load, the injection starting point is commonly decided by the rotate speed of an engine, in-cylinder pressure and injection pressure; at the moment, a fuel oil bundle passes through an arc ridge, and is split into two parts and distributed to an inner chamber and an outer chamber in a best proportion; double swirls are formed so as to more quickly form uniform combustible mixing gas and ensure that combustion is quick and perfect without large inlet vortex flows; and the economical and dynamic indexes of the engine are improved, and the discharge of harmful pollutants can be reduced.

Description

technical field [0001] The invention relates to a fuel injection timing control strategy for a diesel engine with a double plume combustion system, which belongs to the field of fuel oil mixing and combustion control of diesel engines. Fuel injection control strategies and models. Background technique [0002] The fuel supply and regulation system of the internal combustion engine is one of the important systems of the internal combustion engine. Its main function is to provide an appropriate amount of fuel for the cylinder of the internal combustion engine in a timely and high-quality manner to ensure the effective formation and combustion of the mixture in the cylinder. It is the main performance index of the internal combustion engine Such as power, fuel economy, emissions and noise, reliability, durability, etc. all have very important effects. Therefore, for diesel engines, the fuel supply and regulation system can meet the requirements of the whole machine in terms of...

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Problems solved by technology

However, in the existing control concept of the fuel supply and regulation system, there is no such concept that the total amount of fuel is distributed in a ratio of 1:9 after touching the ridge, so the control of the fuel injection starting point must not be compatible with the double plume flow. The combustion chamber has a good matching relationship, which leads to improper matching, resulting in the occurrence of combustion deterioration

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