| 摘要 |
An internal engine fuel property detector for accurately determining the cetane value of the fuel for an internal engine even if the fuel is a high-cetane value fuel. The internal engine fuel property detector comprises cylinder internal pressure detecting means, an ignition delay calculating means for calculating the ignition delay from the cylinder internal pressure, a high-cetane value fuel judging means for judging on the basis of the ignition delay whether or not the fuel used is a high-cetane value fuel, ignition delay extending means for correcting a control parameter of the internal engine so that the ignition delay may be longer when the fuel used is judged to be a high-cetane fuel, ignition delay re-calculating means for re-calculating the ignition delay from the cylinder internal pressure after the ignition delay is extended by ignition delay extending means, and cetane-value calculating means for calculating the cetane value of the fuel used from the re-calculated ignition delay. |
