| 摘要 |
A secondary fuelling system is connected electrically and hydraulically to improve the combustion efficiency and emissions of an internal combustion engine configured to be fuelled with a primary lower octane fuel and a controlled quantity of a secondary higher octane fuel. A method of supplying the secondary fuel includes the steps of measuring the quantity of the primary fuel injected in a primary fuel injection event by counting the number of pulses supplied by a pulse width modulated signal to a primary fuel injector used to maintain the injector open for the primary fuel injection event, computing as a function of the pulse count a proportional quantity of the secondary fuel and providing an injector signal to supply said calculated quantity in the same engine cycle or the following engine cycle. The system may comprise pulse counting circuitry. |
