| 摘要 |
Characteristic correction system for a fuel pressure sensor includes a high-pressure fuel pump 14 for discharging a high-pressure fuel, a high-pressure fuel pipe 15 for accumulating/pressurizing the high-pressure fuel, a fuel pressure control valve 16 for adjusting a fuel pressure of the high-pressure fuel to a given value, a fuel injection valve 2 for directly injecting into the combustion chamber 3 a high-pressure fuel, a pressure release valve 2, 16 for equalizing an internal pressure of the pipe 15, a fuel pressure sensor 18 for detecting the pipe's internal pressure, and a control unit 17 for calculating a correction value for a detected value, based on a pressure differential between the pipe's internal pressure and a known gas pressure, when the pipe's internal pressure is equalized with the known gas pressure.
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