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(11) | EP 1 022 452 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Accumulator fuel injection control apparatus and method |
| (57) An accumulator fuel injection control apparatus and method which performs fuel injection
control with high precision is proposed. This accumulator fuel injection control apparatus
is equipped with detection means (14) for detecting an actual measurement value of
fuel injection pressure of fuel injected into an engine (1), estimation means (22)
for estimating a predictive value of fuel injection pressure, fuel injection amount
calculation means (21) for calculating a fuel injection amount using either the actual
measurement value or the predictive value, and fuel injection means (2) for injecting
fuel into the engine based on the fuel injection amount calculated by the fuel injection
amount calculation means (21). The detection means (14) measures the actual measurement
value at a first timing (t1), and the fuel injection means (2) injects fuel at a second
timing (t2). If an arithmetic processing of the actual measurement value measured
at the first timing (t1) is in time for the second timing (t2), the fuel injection
amount calculation means (21) calculates a fuel injection amount using a result of
the arithmetic processing of the actual measurement value (S50). If the arithmetic
processing is not in time for the second timing, the fuel injection amount calculation
means (21) calculates the fuel injection amount using the predictive value (S46). |