Patent ID: 7131416
Filing Date: 2006-11-07
Classification: F02B,F02D,Y02T

Abstract:
1. An engine air intake device comprising: a collector divided by a partition wall into first and second volume chambers; a first upstream intake pipe portion connected to an upstream side of the first volume chamber relative to a flow of intake air; a second upstream intake pipe portion connected to an upstream side of the second volume chamber relative to the flow of intake air; a plurality of first downstream branch pipes extending from the first volume chamber to respective intake ports of a first bank of first cylinders; a plurality of second downstream branch pipes extending from the second volume chamber to respective intake ports of a second bank of second cylinders; a first communication valve mounted to the partition wall in a position that does not interfere with a path of a main flow of intake air inside the collector, the first communication valve being configured and arranged to allow communication between the first volume chamber and the second volume chamber when the first communication valve is open; and a second communication valve mounted to the partition wall in a position that does not interfere with the path of the main flow of intake air inside the collector, the second communication valve being configured and arranged to allow communication between the first volume chamber and the second volume chamber when the second communication valve is opened.