Anti-Knocking
The CVB ‘anti-knocking’ sensor is specifically designed for improving gas engine performance. It provides the engine ECU with vibration signals when normal values are exceeded due to knocking, allowing the ECU to tune ignition timing and subsequent cylinder load. – See more at: http://www.cmr-group.com/products/industrial-engine-sensors/gas-engine-anti-knocking-sensor/cvb#sthash.xJdpYow9.dpuf