Anti-knocking apparatus for an internal combustion engine

In an internal combustion engine, including means defining a combustion chamber, an intake for introducing a combustible mixture into the combustion chamber, a throttle valve controlling the flow of the mixture in the intake;

• ignition means for externally igniting the mixture in the combustion chamber and an apparatus for reducing engine knocking;
• the improvement in said apparatus comprising:
• (a) a knocking sensor operatively coupled to said combustion chamber for responding to knocking therein and for emitting signals representing the knocking;
• (b) an ignition shifting device connected to said ignition means for shifting the moment of ignition in a delaying sense;
• (c) a valve moving device connected to said throttle valve for moving said throttle valve in a closing sense;
• and
• (d) control means connected to said knocking sensor, said ignition shifting device and said valve moving device for effecting actuation solely of said ignition shifting device up to a maximum predetermined delay in ignition when signals from said knocking sensor are received and for effecting actuation solely of said valve moving device after said maximum predetermined delay has been reached and upon continued receipt of signals from said knocking sensor.