Method and device for controlling fuel-gas ratio of dual-fuel engine

A dual-fuel engine, proportional control technology, applied in engine control, fuel injection control, electrical control and other directions to ensure safety and stability, optimize fuel consumption

Inactive Publication Date: 2011-05-25
BEIJING SHENGBAO LIYUAN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The invention aims at the problem that the traditional diesel/natural gas dual-fuel engine oil-gas ratio control method and device cannot accurately control the ratio of diesel oil and natural gas, thereby affecting the safety and stability of engine operation, and provides a dual-fuel en

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  • Method and device for controlling fuel-gas ratio of dual-fuel engine
  • Method and device for controlling fuel-gas ratio of dual-fuel engine
  • Method and device for controlling fuel-gas ratio of dual-fuel engine

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Embodiment Construction

[0036] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] The embodiment of the present invention provides a method for controlling the ratio of oil and gas in a diesel / natural gas dual-fuel engine. The dual-fuel engine includes a diesel engine, a diesel control system, and a natural gas control system. The diesel engine can use an electronically controlled pump nozzle and an electronically controlled unit pump. And the electronically controlled high-pressure common rail structure engine, the throttle position acquisition component, fuel injection pulse acquisition component and speed acquisition component that have been installed on the diesel engine are throttle position sensor, fuel injection pulse sensor and speed sensor respectively. The control method includes: setting a water temperature sens...

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PUM

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Abstract

The invention discloses a method and a device for controlling the fuel-gas ratio of a dual-fuel engine. The method comprises the following steps that: an electronic control unit (ECU) of the dual-fuel engine determines the working state of a diesel engine and performs fault diagnosis according to an accelerator position signal, a water temperature signal of the diesel engine and a natural gas pressure temperature signal which are acquired, and accurately controls the ratio of diesel to natural gas according to a rotating speed signal of the diesel engine and an original fuel injection pulse width signal which are acquired. By the method and the device, the ratio of the diesel to the natural gas can be accurately controlled according to different working states of the diesel engine, so that the dual-fuel engine is safely and stably operated, and the consumption of fuels and the emission of tail gas are reduced.

Description

Technical field [0001] The invention relates to engine control technology, in particular to an electronically controlled unit pump, pump nozzle, and a method and device for controlling the oil / gas ratio of a diesel / natural gas dual fuel engine under common rail technology. Background technique [0002] In recent years, in order to reduce vehicle operating costs, save energy, and reduce environmental pollution from vehicle exhaust, countries around the world have developed new energy vehicles. Among them, diesel / natural gas dual-fuel vehicles that reduce fuel costs and exhaust emissions while ensuring the power of the original vehicle are developing rapidly. Natural gas has better fuel economy than diesel and has lower exhaust pollutant content. In the existing diesel / natural gas dual-fuel control technology, a natural gas control system is usually added to the diesel engine and diesel control system. The value of pilot fuel is a very important standard. The traditional method i...

Claims

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Application Information

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IPC IPC(8): F02D41/38F02D41/22F02D19/08
Inventor 吕国怀李健陈德岭吴光耀陈长建
Owner BEIJING SHENGBAO LIYUAN SCI & TECH
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