Intake manifold

An intake manifold provided between a cylinder head port mounted on a cylinder head and a surge tank of an engine, the intake manifold comprising:

• a first runner including:
• a first end provided with a first inlet portion connected to the surge tank, and a second end branched at a position spaced apart from the first inlet portion by a predetermined distance along a length direction of the first runner, where the second end of the first runner is respectively connected to first and fourth runners formed in the cylinder head port;
• and
• a second runner including:
• a first end provided with a second inlet portion connected to the surge tank at a position adjacent to the first inlet portion, and a second end branched at a position spaced apart from the second inlet portion by a predetermined distance along a length direction of the second runner, where the second end of the second runner is respectively connected to second and third runners formed in the cylinder head port,
• wherein:
• the first runner includes:
• a first branch runner that is branched toward a first port from a first branch point formed at a position spaced apart from the first inlet portion by a predetermined distance and is provided with a first outlet portion formed so as to be connected to the first port;
• and
• a fourth branch runner that branches from the first branch point toward a fourth port and is provided with a fourth outlet portion so as to be connected to the fourth port, and
• the second runner includes:
• a second branch runner that is branched toward a second port from a second branch point formed at a position spaced apart from the second inlet portion by a predetermined distance and is provided with a second outlet portion formed so as to be connected to the second port;
• and
• a third branch runner that branches from the second branch point toward a third port and is provided with a third outlet portion so as to be connected to the third port, and
• wherein:
• the first runner is provided with a first auxiliary inlet portion formed between the first inlet portion and the first branch point so as to be connected to the surge tank separately from the first inlet portion, and
• the second runner is provided with a second auxiliary inlet portion formed between the second inlet portion and the second branch point so as to be connected to the surge tank separately from the second inlet portion.