US Patent 11035307 Systems and methods for reducing vehicle valve degradation

Methods and systems are provided for reducing degradation and issues related to noise, vibration and harshness (NVH) for a canister purge valve. In one example, a method may include sequentially increasing a duty cycle of a canister purge valve over a course of a purging operation to purge fuel vapors stored in a fuel vapor canister to an intake of an engine, while timing opening and closing events of the canister purge valve to coincide with pressure differences lower than a threshold in terms of pressure oscillations across the canister purge valve. In this way, purging of the canister may be efficient while additionally reducing degradation and NVH issues related to the CPV.