Apparatus for regulating the air-fuel mixture in an externally ignited internal combustion engine operating on injected fuel
Abstract
Abstract THE FUEL RACK OF A FUEL INJECTION PUMP IS REGULATED AS A FUNCTION OF THE ENGINE R.P.M., THE POSITION OF THE ARBITARILY OPERATED BUTTERFLY VALVE AND OTHER OPERATIONAL VARIABLES. FOR THIS PURPOSE AN ELECTRIC SIGNAL REPRESENTING A DESIRED VALUE IS DERIVED FROM THE ANGULAR AND AXIAL POSITIONS OF A THREE-DIMENSIONAL CAM (WHICH ASSUMES ITS POSITION IN RESPONSE TO AN ELECTRIC SIGNAL CHARACTERIZING THE ACTUAL ENGINE R.P.M. AND IN RESPONSE TO A MECHANICAL SIGNAL CHARACTERIZING THE ACTUAL POSITION OF THE BUTTERFLY VALVE) AND IS COMPARED WITH AN ELECTRIC SIGNAL REPRESENTING AN ACTUAL VALUE DERIVED FROM THE ACTUAL POSITION OF THE FUEL RACK. THE ELECTRIC SIGNAL RESULTING FROM SAID COMPARISON IS APPLIED TO A CONTROL MEMBER WHICH IS DISPLACED ACCORDINGLY AND WHICH, BY VIRTUE OF ITS CONNECTION WITH THE FUEL RACK, CAUSES A CORRESPONDING MOVEMENT OF THE LATTER. ELECTRIC CORRECTING SIGNALS REPRESENTING PHYSICAL MAGNITUDES, SUCH AS ENGINE TEMPERATURE AND ATMOSPHERIC PRESSURE, VARY THE DESIRED AND/OR ACTUAL VALUE SIGNALS PRIOR TO THEIR COMPARISON.
Inventors
- 👤 G Engel
- 👤 K Eckert
- 👤 H Knapp
Bibliographic Details
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