Where is the four-dimensional X3 waste gas check valve?

The exhaust gas circulation check valve is close to the throttle body on the right side of the intake pipe.

The exhaust gas circulation check valve is close to the throttle body on the right side of the intake manifold and connected with the intake manifold and the exhaust manifold. The opening of the valve is controlled by a vacuum tube to determine the amount of exhaust gas delivered to the intake manifold. Exhaust gas recirculation check valve is a mechatronics product installed on diesel engine to control exhaust gas recirculation of intake system, and it is an exhaust gas recirculation device.