| 摘要 |
PURPOSE:To prevent knocking, by increasing an injection frequency of a fuel injection valve from a regular frequency in accordance with a knocking detection signal and decreasing intake air temperature without causing a bad influence for combustibility, fuel consumption, etc. CONSTITUTION:If knocking is caused by a temperature rise of intake air, output of a knock sensor 1 is changed to a knock signal F via the first comparator circuit 4, integrating circuit 5 and the second comparator circuit 6. This output F is input to the second gate circuit 14 through the first gate circuit 8, and this signal causes an output of the second revolution pick up 13 to pass the circuit 14 and to be input to a fuel arithmetic circuit 15 together with an output of the first revolution pick up 12. Here a number of the both pulses are added together, changed to a pulse number two times a regular pulse further converted with the width to 1/2 the regular pulse width, and this injection pulse signal is fed to an injection valve 16. Accordingly, one time quantity of injection is decreased to improve vaporization, and temperature of intake can be substantially decreased. |
