| 摘要 |
<p>The fuel properties detecting apparatus has a pressure detector to sense an inner pressure of cylinder, a crank angle detector for a crank angle of engine, and a control device which is adapted to receive signals from the pressure detector and the crank angle detector to thus calculate an effective calorific value Q of fuel in an ignition cycle on the basis of an inner pressure of a cylinder P(theta) at a crank angle in compression and expansion strokes in an ignition cycle, a crank angle theta and a cylinder capacity V(theta), and to obtain an effective combustion rate K or a low level calorific value Hu of fuel. Fuel properties are detected by using at least one of the effective combustion rate K and the low level calorific value Hu, or a ratio of a fuel injection pulse width Ti to the low level calorific value Hu (Ti/Hu).</p> |
