Patent ID: 6202627
Filing Date: 2001-03-20
Classification: F02B,F02D,F02M,Y02T

Abstract:
A V-type multi-cylinder internal combustion engine in which ignition in a right bank and ignition in a left bank occur alternately and at equal intervals, and a suction manifold shaped symmetrically in respect of right and left is disposed between the right and left banks, said suction manifold comprising:a pair of right and left throttle bases to be connected with respective right and left throttle bodies;a suction manifold upper positioned between said right and left throttle bases, integrally formed with right first suction passages communicating with respective suction ports of cylinders in said left bank and left first suction passages communicating with respective suction ports of cylinders in said right bank, said right first suction passages and said left first suction passages being arranged one by one alternately crossing each other;a right first chamber formed at a contact surface portion between said right throttle base and said suction manifold upper;a left first chamber formed at a contact surface portion between said left throttle base and said suction manifold upper; anda suction manifold lower integrally connected to and positioned under said manifold upper having a right second chamber and a left second chamber, wherein:said right first chamber and said right second chamber always communicate with each other through a right communication passage;said left first chamber and said left second chamber always communicate with each other through a left communication passage;right second suction passages for connecting said right second chamber with said respective suction ports of cylinders in the left bank through said right first suction passages, and left second suction passages for connecting said left second chamber with said respective suction ports of cylinders in the right bank through said left first suction passages are formed around said right and left second chambers and arranged one by one alternately crossing each other; andsaid suction manifold is fixed on right and left cylinder heads by attaching said suction manifold upper to said right and left cylinder heads.