What is the working principle of the EGR valve?

[Emmanuel]

EGR valve works as follows: 1. The EGR valve stem rises, pushing the connected sliding contact arm to change its position, causing the sliding contact to move along the sliding resistor, generating different voltage signals. These signals are transmitted to the engine control ECU, which monitors the position of the EGR valve to ensure it responds correctly to ECU commands. This adjusts and corrects the opening timing and duty cycle of the EGR valve, precisely controlling the amount of recirculation to reduce emissions and improve performance. 2. EGR stands for Exhaust Gas Recirculation system, and the EGR valve is a key control component in the entire EGR system. The EGR valve is installed on the intake manifold. Exhaust Gas Recirculation (EGR valve) introduces exhaust gases into the intake manifold, reducing the oxygen content in the intake air, thereby lowering combustion temperature and reducing nitrogen oxide emissions. The EGR valve, or Exhaust Gas Recirculation valve, is a mechatronic product installed on diesel engines to control the amount of exhaust gas recirculated back into the intake system.