| 摘要 |
<p>In an air/fuel supply system for enabling an internal combustion engine to utilise liquefied gaseous fuel efficiently, a solenoid operated fuel injector (18) injects the fuel in a liquid state into a mixing region (26) of the induction system. A control system monitors the cooling effect of the vapourising fuel by measuring the temperature difference between a pair of temperature sensors (44, 46), respectively upstream and downstream of the mixing region and compares the measured temperature difference against a preset reference level to derive an error signal. The error signal is applied to control the fuel injector and regulate the fuel supply to maintain the temperature difference and related mixture strength constant at a value set by the reference level. The reference level may be controlled by monitoring other parameters or operating characteristics e.g. intake air humidity, exhaust gas composition or firing voltage values, to determine and hold the optimum setting. </p> |
