| 摘要 |
PURPOSE:To effectively and high-responsively restrain knocking, by rapidly delivering control signals having suitable values necessary for restraining knocking, which have been stored beforehand in a memory in accordance with the operating conditions of the engine, upon occurrence of knocking to restrain knocking CONSTITUTION:When an ignition signal is generated from an ignition signal generator 1, being accompanied with rotation of an engine, a waveform shaping circuit 2 issues ignition pulses having a predetermined pulse width, which correspond to an ignition pulse signal input in a switch circuit 4 after passing through a phase shifter 3, so that turn on and off the supply of power to an ignition coil 5, and upon turn- off of the power supply each engine cylinder is ignited at an ignition voltage generated in the coil 5, and therefore, the engine is driven. A pressure sensor 8 detects the internal pressure of an intake-air pipe which is sensitive to the load of the engine, and an acceleration sensor 6 detects the vibrational acceleration of the engine. Further, a knocking detector 7 sorts the components of knocking, and the level of result is delivered to a computer 11. The rotational speed of the engine is obtained from the output of the circuit 10. The computer 11 detects knocking to restrain the same. |
