Merkur Xr4ti L4-140 2.3L SOHC Turbo (1985)
Knock Sensor: Description and Operation
Knock Sensor
XR4Ti
The knock sensor, Fig. 7, is a piezo-electric accelerometer. The sensor uses the resonant frequency to mechanically amplify the engine knock
frequency (5-6) KHz. This device is used to detect engine detonation. When detonation occurs the electronic control assembly will retard ignition timing
to prevent engine knock.
