Blow-by gas return device

A blow-by gas return device comprising:

• a gas path which is configured to introduce a blow-by gas generated in a crankcase into an intake system through an inside of a head cover, a pressure control valve and a blow-by pipe;
• a passage for the blow-by gas being formed on a mounting flange of an intake manifold, the mounting flange being mounted on a cylinder head,
• and an orifice being formed in the passage for the blow-by gas,
• the intake manifold including:
• a plurality of branched pipe portions;
• an intake body communicating with the plurality of branched pipe portions respectively;
• and
• the mounting flange integrating distal end sides of the respective branched pipe portions to each other, the distal end sides being located in a downstream location of an air supply direction,
• the intake system is disposed in the intake body,
• wherein the blow-by pipe is configured to introduce the blow-by gas having flowed through the passage for the blow-by gas to the intake body, and
• wherein the blow-by pipe includes:
• a first tube which connects the pressure control valve mounted on the head cover and the passage for the blow-by gas;
• and a second tube which connects the passage for the blow-by gas and the intake body.