Intake manifold

An air intake manifold, comprising:

• an air intake tube configured to communicate with a plurality of cylinders of an internal combustion engine of a vehicle, the air intake tube including:
• an air intake passage through which intake air is flowable;
• an intake air guide-in part via which the intake air is flowable into the air intake passage;
• a plurality of branch tubes disposed downstream of the intake air guide-in part via which the intake air is distributable and suppliable to each of the plurality of cylinders, the plurality of branch tubes each defining a respective portion of the air intake passage;
• a mounting part via which the air intake passage is linkable to each cylinder of the plurality of cylinders, the mounting part disposed downstream of the plurality of branch tubes and mountable on a main body side of the internal combustion engine;
• and
• a valve disposed inside the plurality of branch tubes adjacent to the mounting part;
• a blow-by gas passage via which blow-by gases of a crankcase of the internal combustion engine are guidable to the air intake tube, the blow-by gas passage including:
• a blow-by gas guide-in part through which the blow-by gases are guidable;
• a blow-by gas flow path part connected to the blow-by gas guide-in part;
• a plurality of connecting passage parts each branching off from the blow-by gas flow path part and connected to a respective branch tube of the plurality of branch tubes;
• and
• a plurality of blow-by gas guide-out parts each connected to a respective branch tube of the plurality of branch tubes at a position adjacent to a free end of the connecting passage part connected to the respective branch tube, the plurality of connecting passage parts each in fluid communication with the portion of the air intake passage defined by the respective branch tube connected thereto via a respective blow-by gas guide-out part of the plurality of blow-by gas guide-out parts;
• wherein an apex part, which is a highest position of the plurality of branch tubes in a vehicle height direction, is arranged between the plurality of blow-by gas guide-out parts and the mounting part relative to a planar direction extending perpendicular to the vehicle height direction;
• and
• the plurality of blow-by gas guide-out parts are arranged at a higher position than the apex part in the vehicle height direction.

An air intake manifold, comprising:

• an air intake tube configured to communicate with a plurality of cylinders of an internal combustion engine of a vehicle, the air intake tube including:
• an air intake passage through which intake air is flowable;
• an intake air guide-in part via which the intake air is flowable into the air intake passage;
• a plurality of branch tubes disposed downstream of the intake air guide-in part via which the intake air is distributable and suppliable to each of the plurality of cylinders, the plurality of branch tubes each defining a respective portion of the air intake passage;
• a mounting part via which the air intake passage is linkable to each cylinder of the plurality of cylinders, the mounting part disposed downstream of the plurality of branch tubes and mountable on a main body side of the internal combustion engine;
• and
• a valve disposed inside the plurality of branch tubes adjacent to the mounting part;
• a blow-by gas passage via which blow-by gases of a crankcase of the internal combustion engine are guidable to the air intake tube, the blow-by gas passage arranged on an upper side of the air intake tube relative to a vehicle height direction, the blow-by gas passage including:
• a blow-by gas guide-in part through which the blow-by gases are guidable;
• a blow-by gas flow path part connected to the blow-by gas guide-in part;
• a plurality of connecting passage parts each branching off from the blow-by gas flow path part and connected to a respective branch tube of the plurality of branch tubes, the plurality of connecting passage parts each having a longitudinal extent extending transversely to the vehicle height direction;
• and
• a plurality of blow-by gas guide-out parts each connected to a respective branch tube of the plurality of branch tubes at a position adjacent to a free end of the connecting passage part connected to the respective branch tube, the plurality of connecting passage parts each in fluid communication with the portion of the air intake passage defined by the respective branch tube connected thereto via a respective blow-by gas guide-out part of the plurality of blow-by gas guide-out parts;
• wherein an apex part, which is a highest position of the plurality of branch tubes in the vehicle height direction, is arranged between the plurality of blow-by gas guide-out parts and the mounting part relative to a planar direction extending perpendicular to the vehicle height direction.