초록 ▼

A diesel engine includes a turbocharger, an intercooler, a particulate filtering unit, and an EGR cooler. EGR ratio of intake air, injection timing of an injection nozzle, and excess air ratio to fuel are controlled depending upon engine-operating load. Lean premixed compression ignition is performe

A diesel engine includes a turbocharger, an intercooler, a particulate filtering unit, and an EGR cooler. EGR ratio of intake air, injection timing of an injection nozzle, and excess air ratio to fuel are controlled depending upon engine-operating load. Lean premixed compression ignition is performed at low engine load; low temperature combustion at low excess air ratio with high EGR ratio is performed at medium engine load; and normal EGR combustion is performed at high engine load.

대표청구항 ▼

1. An internal combustion engine comprising means for decreasing combustion temperature and means for increasing ignition delay, both of said means being used at low to medium engine load such that combustion of fuel in the engine is at a temperature lower than that at which NOx is produced and at a

1. An internal combustion engine comprising means for decreasing combustion temperature and means for increasing ignition delay, both of said means being used at low to medium engine load such that combustion of fuel in the engine is at a temperature lower than that at which NOx is produced and at an equivalent ratio lower than that at which soot is produced, said means for decreasing combustion temperature being used at medium to high engine load such that combustion of the fuel in the engine is at a temperature lower than that at which NOx or soot is produced.