Patent ID: 8061130
Filing Date: 2011-11-22
Classification: F01N

Abstract:
1. A collecting part structure of an exhaust manifold comprising: a plurality of branch pipes having exhaust-gas upstream side end portions that are connected with a head flange; a collecting part that collects and contains exhaust-gas downstream side end portions of the branch pipes; a partition plate that has an exhaust-gas upstream side end portion is fixed among the exhaust-gas downstream side end portions of the branch portions, the partition plate being arranged in a state where an exhaust-gas downstream side end portion of the partition plate projects in an interior of the collecting part; and a sensor attachment boss part that is fixed by welding on a part of an outer circumferential portion of the collecting part in a state where the sensor attachment boss part faces an attachment hole formed in the collecting part, wherein a plurality of insertion holes are formed in a reduced diameter portion of the collecting part, and wherein the partition plate is fixed by welding on a portion of the outer circumferential portion of the collecting part in a state where portions of the partition plate are inserted in and positioned to the insertion holes.