초록 ▼

A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low oxides of nitrogen emissions, good overall efficiency and acceptable combustion noise and cyli

A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low oxides of nitrogen emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal. A processor receives the signal and generates control signals based on the engine operating condition signal for controlling various engine components to control the temperature, pressure, equivalence ratio and/or autoignition properties so as to variably control the combustion history of future combustion events to achieve stable, low emission combustion in each cylinder and combustion balancing between the cylinders.

대표청구항 ▼

[ We claim:] [1.]1. An internal combustion engine operable in a premixed charge compression ignition mode, comprising:an engine body;a combustion chamber formed in the engine body for containing a mixture of fuel and air;an intake air system for delivering intake air, including at least one of air a

[ We claim:] [1.]1. An internal combustion engine operable in a premixed charge compression ignition mode, comprising:an engine body;a combustion chamber formed in the engine body for containing a mixture of fuel and air;an intake air system for delivering intake air, including at least one of air and a mixture of air and fuel, to said combustion chamber,combustion history control system for controlling a combustion history of future combustion events to optimize engine operation, said combustion history control system including a temperature control system for ultimately varying the temperature of the mixture of fuel and air, said temperature control system including an intake air temperature control system for controlling the temperature of the intake air in the intake system, said intake air temperature control system including a cooler positioned in said intake air system, a bypass passage for bypassing flow around said cooler and at least one flow valve positioned in said intake air system and adjustable to control flow through said cooler and said bypass passage; anda processor adapted to move said at least one flow valve based on engine operating conditions to control air flow so as to optimize engine operation.