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2. Engine knocking - Wikipedia

   en.wikipedia.org/wiki/Engine_knocking

   A control loop is permanently monitoring the signal of one or more knock sensors (commonly piezoelectric sensor which are able to translate vibrations into an electric signal). If the characteristic pressure peak of a knocking combustion is detected the ignition timing is retarded by steps of a few degrees.

3. Automatic Performance Control - Wikipedia

   en.wikipedia.org/wiki/Automatic_Performance_Control

   To detect knock, a piezoelectric knock sensor (basically a microphone) bolted to the engine block responds to unique frequencies caused by engine knock. The sensor generates a small voltage that is sent to the electronic control unit , which processes the signal to determine if, in fact, knock is occurring.

4. Ignition timing - Wikipedia

   en.wikipedia.org/wiki/Ignition_timing

   Pressure in cylinder pattern in dependence on ignition timing: (a) - misfire, (b) too soon, (c) optimal, (d) too late. In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke.

5. What are the deadliest plane accidents? See list after South ...

   www.aol.com/deadliest-plane-accidents-see-list...

   After over 100 people were killed in a South Korea plane accident, here are the worst accidents and crashes in aviation history.

6. "Desperate" killer who escaped from Mississippi prison is ...

   www.aol.com/manhunt-desperate-murderer-escaped...

   In a Facebook post Tuesday night, the George County Sheriff's Office urged the public to be cautious. "He will be desperate and very very dangerous. Call your family and alert them. Send messages ...

7. An employee stabbed the president of their manufacturing ...

   www.aol.com/employee-stabbed-president...

   An employee stabbed a Michigan company's president during a staff meeting, the police said. A suspect, whom fellow employees describe as quiet, left the scene but was subsequently arrested.

8. Knock sensor - Wikipedia

   en.wikipedia.org/?title=Knock_sensor&redirect=no

   With possibilities: This is a redirect from a title that potentially could be expanded into a new article or other type of associated page such as a new template.The topic described by this title may be more detailed than is currently provided on the target page or in a section of that page.

9. Deloitte predicts record spending on Black Friday and Cyber ...

   www.aol.com/finance/deloitte-predicts-record...

   Inflation fears aren’t as omnipresent as they were earlier in the year and shoppers are ready to spend as the holiday season gets underway, according to Deloitte.. A new report from the ...