Intake manifold assembly for internal combustion engine system

An intake manifold assembly comprising:

• an exhaust gas recirculation system including a venturi with a venturi body, the venturi body comprising:
• an upstream cylindrical portion in exhaust gas receiving communication with a cylinder of an internal combustion engine system and configured to receive the exhaust gas from the cylinder,
• a convergent portion contiguous with the upstream cylindrical portion and in exhaust gas receiving communication with the upstream cylindrical portion,
• a downstream cylindrical portion contiguous with the convergent portion, separated from the upstream cylindrical portion by the convergent portion, and in exhaust gas receiving communication with the convergent portion, and
• a divergent portion contiguous with the downstream cylindrical portion, separated from the convergent portion by the downstream cylindrical portion, and in exhaust gas receiving communication with the downstream cylindrical portion;
• and an intake manifold with an intake manifold body, the intake manifold body comprising:
• an air inlet body configured to receive air,
• an exhaust gas inlet body in exhaust gas receiving communication with the divergent portion, and
• an outlet body in air receiving communication with the air inlet body and exhaust gas receiving communication with the exhaust gas inlet body;
• an upstream isolator, wherein the venturi body further comprises an upstream intake flange having an upstream intake flange aperture, the upstream isolator inserted within the upstream intake flange aperture;
• and
• an upstream fastener, wherein:
• the venturi body further comprises an upstream boss having an upstream boss aperture;
• the intake manifold body further comprises an upstream venturi flange having an upstream venturi flange aperture;
• the upstream isolator comprises an upstream isolator aperture;
• the upstream fastener is received within the upstream isolator aperture, the upstream venturi flange aperture, and the upstream boss aperture;
• the upstream fastener threadably engages the upstream boss aperture;
• the upstream fastener does not threadably engage the upstream venturi flange aperture;
• and
• the upstream fastener does not threadably engage the upstream isolator aperture.