Computerized control system for high-pressure fuel injection system for internal combustion engine with two high-pressure fuel pumps integrates difference between actual and estimated fuel pressure

摘要

The computer runs a program at given time intervals or triggered by the crankshaft reaching a given angle. A first start step (S1) involves initialization of variables. The second step (S2) calculates an integral value (I-PUMP) from a measured fuel pressure (FUP-AV) and an estimated value (FUP-EST). The third step (S3) compares the integrated value with a maximum pump pressure (I-PUMP-MAX). Further steps (S4-S13) process pump pressure data.