초록 ▼

A method and apparatus for achieving optimized efficiency combustion in a diesel internal combustion engine utilizes a cylinder pressure detector which measures peak cylinder pressure relative to crankshaft timing and compares it with a speed-load-timing map comprising several engine parameters incl

A method and apparatus for achieving optimized efficiency combustion in a diesel internal combustion engine utilizes a cylinder pressure detector which measures peak cylinder pressure relative to crankshaft timing and compares it with a speed-load-timing map comprising several engine parameters including engine speed and engine load in order to compensate for various unknown combustion characteristics of the fuels to be used in compression ignition engines, and automatically adjusts fuel injection timing for optimum efficiency.

대표청구항 ▼

In a diesel internal combustion engine comprising means defining a cylinder having a cylinder head, a piston disposed in said cylinder and adapted to move toward and away from said cylinder head, a crankshaft connected to said piston and driving a load, a fuel injection system connected to said cyli

In a diesel internal combustion engine comprising means defining a cylinder having a cylinder head, a piston disposed in said cylinder and adapted to move toward and away from said cylinder head, a crankshaft connected to said piston and driving a load, a fuel injection system connected to said cylinder and having a fuel injection pump, the improvement comprising means for detecting peak cylinder pressure inside of said cylinder and generating a peak cylinder presssure signal, means for measuring the speed of said crankshaft and generating a speed signal proportional to said crankshaft speed, means for measuring said load on said engine and generating a load signal proportional to said engine load, means for measuring crankshaft timing relative to peak cylinder pressure and generating an actual crankshaft timing signal, a speed-load-timing map having a speed axis, a load axis and a timing axis, means for continuously comparing crankshaft speed with said speed axis of said speed-load-timing map, means for continuously comparing engine load with said engine load axis of said speed-load-timing map, means for measuring a timing value along said timing axis of said speed-load-timing map according to the value represented at the intersection of speed and load coordinate values and generating an optimum crankshaft timing signal, means for comparing said actual crankshaft timing signal and said optimum crankshaft timing signal and generating a crankshaft timing difference signal, and means for adjusting the timing of said fuel injection based on said crankshaft timing difference signal to reduce said difference signal to zero and achieve optimized efficiency combustion.