Control system of energy-saving emission-reducing engine

Abstract

The invention provides a control system of an energy-saving emission-reducing engine. According to the control system, an outer ring flow sensor is arranged in an outer ring gas channel to detect conveyed gas flow, power of the engine can be accurately determined according to the gas flow, and methanol and natural gas can simultaneously serve as fuel for the engine, so that the engine works in three fuel modes of single methanol, single natural gas and methanol / natural gas mixed fuel. When the engine is in a low-temperature state, the engine can be started by the natural gas and warmed, and the problem of low-temperature starting of the methanol engine can be solved, so that a fuel selection range of the engine can be enlarged, a vehicle powered by the engine has better regional adaptability, due to the fact that the combustion speed of the natural gas is low and the combustion speed of the methanol is high, compared with an original natural gas engine, the engine adopting a methanol and natural gas dual-fuel mode has better combustion performance, and the dynamic property and fuel economy of the engine are improved.

Description

technical field [0001] The invention belongs to the technical field of engine energy saving and emission reduction, and in particular relates to an energy saving and emission reduction engine control system. Background technique [0002] From the perspective of the energy heat balance of the engine, the effective power output by the general engine only accounts for about 20%-40% of the total heat of fuel combustion, and the remaining heat energy is mainly transferred to the atmospheric environment. It can be seen from this that for vehicle engines, the waste heat energy has great potential for energy saving, and the waste heat energy recovery and utilization technology has a wide application space. At present, engine waste heat energy utilization technology mainly focuses on supercharging, waste heat refrigeration, waste heat heating, waste heat power generation and improving fuel combustion performance. Among the various technical solutions for waste heat utilization in v...

AI Technical Summary

Problems solved by technology

The problems when using pure methanol as fuel are: 1. The latent heat of vaporization of methanol is large, which makes it difficult to start the engine cold. Therefore, the current methanol engine usually uses gasoline to start when the temperature is low. Switch to methanol working mode after high temperature

2. At present, the supply chain of methanol is not perfect enough, and there are still some problems in the filling of methanol fuel. Therefore, vehicles powered by methanol engines cannot run for a long time in areas without methanol supply, and the use area of ​​vehicles is restricted limit

However, the current supply chain of natural gas is not perfect, and there are still some problems in the filling of natural gas fuel in many areas, especially in winter due to the shortage of natural gas supply for vehicles due to heating consumption

Therefore, a car powered by a natural gas engine cannot run for a long time in an area without natural gas supply, and the use area of ​​the car is also limited.