Aisan Kogyo Kabushiki Kaisha

Akinari Yasue

Mamoru Yoshioka

Hironori Suzuki

Kaisho So

Naruto Ito

An EGR gas distributor includes a gas chamber, a gas inflow passage to introduce EGR gas on its upstream side, gas outflow passages to discharge the EGR gas to branch pipes on their downstream side. An inner wall on a downstream side of the gas chamber is divided into downstream-side divided walls corresponding to the respective gas outflow passages, and the downstream-side divided walls are curved or slanted to be of protrusion-like shape protruding toward the corresponding gas outflow passages. Downstream-side dividing ridges are provided each between the adjacent downstream-side divided walls. An inner wall on the upstream side of the gas chamber is placed to face the downstream-side inner wall and provided with at least one upstream-side ridge protruding toward the downstream-side divided walls in each area corresponding to the downstream-side divided walls.

EGR gas distributor

An intake apparatus includes an intake manifold, an EGR gas distributor, and an EGR cooler. The intake manifold includes a surge tank and branch pipes. The EGR gas distributor includes a gas inlet, a gas chamber, and gas distribution pipes connected to the branch pipes. The branch pipes are each formed with a connecting hole for the gas distribution pipes. The EGR cooler is provided adjacent to the gas chamber to warm the inside wall of the gas chamber and includes a hot water passage and a gas passage. The gas chamber and the hot water passage are arranged to traverse the branch pipes. The gas distribution pipes are connected to the corresponding connecting holes. The EGR gas distributor and the EGR cooler in an integrated form are attached to the intake manifold.

Intake apparatus

The EGR gas distributor is attached to an intake manifold to distribute EGR gas to each of branch pipes constituting the intake manifold. The EGR gas distributor includes a gas distribution part including a gas inlet port for EGR gas, a plurality of gas outlet ports connected to each corresponding branch pipe, and a gas passage that extends by branching off into a plurality of branch sections from the gas inlet port to each gas outlet port. The gas passage has a tournament branch shape that extends by stepwise branching off from the gas inlet port to each gas outlet port and is symmetric about the gas inlet port. The EGR gas distributor includes a heating part provided adjacent to the entire gas distribution part to heat the gas distribution part. The heating part is constituted of a hot-water passage part configured to allow hot water to flow therethrough.

Growing community of inventors

Tokai, Japan

Akinari Yasue