A turbine engine ignition exciter circuit applies energy stored in the exciter tank capacitor to the load (igniter plug) through a thyristor type semiconductor switching device that minimizes leakage current at elevated operating temperatures. The semicond...

An apparatus and method to detect abnormal combustion conditions for use as a feedback control of an EGR (Exhaust Gas Recirculation) controlled reciprocating engine using ionization signals is presented. The system receives a succession of ionization signa...

The present invention provides a system that controls the amount and timing of pilot fuel injection to obtain minimum NO x and UHC emissions. The system senses if combustion occurs, when combustion occurs, and/or the quality of combustion in the combustion...

An apparatus and method to detect and control the combustion quality of a lean bum reciprocating engine using ionization signals is presented. The system receives a succession of ionization signals for successive cycles of a running engine and processes a ...

An apparatus and method to detect abnormal combustion conditions for use as a feedback control of a lean burn reciprocating engine using ionization signals is presented. The system receives a succession of ionization signals for successive cycles of a runn...

A mechanism for controlling forces in a valve assembly such as flow induced forces. The valve assembly comprises a valve body defining first and second flow passages. A valve is movable in the valve body along an axis to control fluid flow between the firs...

A fuel system for use in an internal combustion engine, the fuel system comprising a source (10) of high pressure fuel for supplying fuel through a single fuel supply path (14) to an injector (12) for injecting fuel, a first valve arrangement (16) for cont...