knocking


Also found in: Dictionary, Thesaurus, Medical, Legal, Idioms, Wikipedia.

knocking

A loud knocking or banging noise made inside a reciprocating engine cylinder during the combustion stroke caused by shock waves produced by the detonating engine. Knocking is an explosion rather than a smooth burning process. It is caused by burning either the wrong fuel or the incorrect amount of fuel. The fuel-air mixture, in this case, ahead of the flame front gets so hot that it explodes and produces a rattling noise, or knocking.
References in periodicals archive ?
Because the beginning premise is that law enforcement officers must knock and announce before making entry to search or arrest, the next issue to address is what is required after knocking and announcing.
We cannot be more elated to bring live video broadcasting to the iPhone," explains Jim Montalto co-founder of Knocking and Pointy Heads Software.
As can be seen in Figure 4, knocking combustion conditions contain high frequency pressure amplitudes which are not seen during non-knocking combustion conditions.
41) The court also discussed the amount and duration of the knocking undertaken by the officers, concluding
The knocking continues, louder and more impatient, and now we see a Porter coming to the gate, but he doesn't seem to be in much of a hurry.
Knocking is a breakthrough empowering friends to share moments like never before," said Jim Montalto, co-founder of Pointy Heads Software.
Please think again before knocking this building down.
The court went on to find that even if the exigency had not existed at that point, the agents did not impermissibly create the emergency because they acted lawfully by knocking on the door and announcing their presence.
It was the night porch lights all over the San Fernando Valley stayed on until the postman came knocking.
Because that may not always be a practicable option, there should be relatively little risk of knocking on the suspect's door and awaiting a response.
Furthermore, It's not every day you get paid $10,000 for knocking the legendary Doyle Brunson and his friends out of a poker tournament," - added Mr.
James Toney said he looks forward to knocking out ``a legend.