Premixed charge compression ignition engine with optimal combustion control

Abstract

The present invention provides a premixed charge compression ignition engine and control system (10), which can effectively trigger combustion and maintain stable combustion by means of compression ignition, while achieving extremely low nitrogen oxide emissions, good overall efficiency and Acceptable combustion noise and cylinder pressure. The engine and control system (10) of the present invention can effectively control the combustion process by controlling certain control variables of temperature control, pressure control, mixture self-ignitability control and equivalence ratio control, that is, the time of combustion initiation, the combustion rate , duration of combustion and / or completeness of combustion. The combustion control system (10) provides active feedback control of combustion and includes a sensor for detecting engine operating conditions representative of a combustion process, such as ignition of combustion, and generating a corresponding engine operating condition signal (18) , such as the pressure sensor (16).

Description

technical field

[0001] The present invention relates broadly to a compression ignition engine arranged to internally combust a fuel-air premixed charge using auto-ignition to reduce emissions while maintaining desirable fuel economy. Background technique

[0002] For more than seventy-five years, the internal combustion engine has been the primary motive force for human use. It cannot be overstated by any measure of its importance and of human engineering efforts to improve its performance. It is therefore well understood that in the field of internal combustion engine technology, so-called "new" engine designs are merely the result of a selection from various known alternative designs. For example, an improved output torque curve can easily be obtained at the expense of engine fuel economy. Improvements in emissions or reliability can also be obtained by increasing the cost of the engine. Other goals, such as increased power and reduced engine siz...

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