View Full Version : What is a knocklink??
Danny_B
Wed 25-02-2004, 05:27 PM
Can someone please enlighten me as i have not got a clue :?
Kev
Wed 25-02-2004, 05:36 PM
Do a search. Lots of stuff on this.
KNOCK LINK
Most modern engines will already have a knock sensor fitted as standard, but any type of knock sensor may be fitted as required. The sensor is normally screwed into a boss on the engine block although some manufactures fit the sensor in the inlet manifold. In either case, the sensor must be in such a position that block variations are coupled to the sensor. Assuming the engine is operating correctly, the LED’s will show only background noise which will rise in proportion to engine power output. Any abrupt rise in signal level at any time is an indication that detonation is occurring. The immediate remedy is to close the throttle. Severe detonation will destroy any engine in seconds. Knocking is the self detonation of the unburnt fuel in the combustion chamber toward the end of combustion. The flame burns around ten times faster than normal causing high pressures. Possible cures for knocking are: cooler intake air: increased intake humidity; reduce load; increase RPM; enrich or lean engine from lambda stochiometric; improve spark; increase octane level of fuel; reduce total ignition advance etc.
Monitor engine "noise"
Optimise advance
Detect detonation
Mechanical or Electrical Ignition
Toolbox tool or permanent fit
The Knock Sensor in many cars is quite often a sophisticated microphone. These can with engine modifications prove to be unreliable , this is where the KNOCK LINK comes into its own. Being able to isolate abrupt rise in signal level allows one to prevent the damage knocking causes. Keep a finger on your upgrades. Your Knock LINK will not only allow a safer upgrade path but also prevent destruction of an engine that comes as result of knocking or pinging.
Danny_B
Thu 26-02-2004, 10:27 AM
Cheers Kev :wink:
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