EXHAUST GAS RECIRCULATION DEVICE

• US 20160281651A1
• Filed: 03/14/2016
• Published: 09/29/2016
• Est. Priority Date: 03/23/2015
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: HASHIMOTO, Koji
• Granted Patent: US 9,926,893 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F02M 26/21 with EGR valves located at or near the connection to the intake system
• CPC Class Codes: F02M 26/41 characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
• CPC Class Codes: F02M 26/51 EGR valves combined with other devices, e.g. with intake valves or compressors combined with intake air throttles F02M26/64
• CPC Class Codes: F02M 26/70 Flap valves; Rotary valves; Sliding valves; Resilient valves

Abstract

An exhaust gas recirculation device includes a housing including an inner wall defining an intake passage through which an intake air passes. The housing includes an outlet opening of an EGR gas provided in the inner wall, and a throttle valve positioned in the intake passage and generating a negative pressure at the outlet opening. The housing includes an intake air guide device provided in the housing and guiding the intake air, which has passed between the throttle valve and the inner wall of the housing, toward an axial center area of the intake passage. At least a part of the intake air guide device is positioned on an upstream side of the intake air with respect to the outlet opening.

Claims

1. An exhaust gas recirculation device comprising:

a housing including an inner wall defining an intake passage through which an intake air passes, and an outlet opening of an EGR gas provided in the inner wall;

a throttle valve positioned in the intake passage and generating a negative pressure at the outlet opening, and

an intake air guide device provided in the housing and guiding the intake air, which has passed between the throttle valve and the inner wall of the housing, toward an axial center area of the intake passage, wherein

at least a part of the intake air guide device is positioned on an upstream side of the intake air with respect to the outlet opening.

2. The exhaust gas recirculation device according to claim 1, wherein

the intake air guide device is provided adjacent to the outlet opening at least in an area in which the outlet opening positioned.

3. The exhaust gas recirculation device according to claim 1, wherein the intake air guide device is an annular shape extending along an inner peripheral wall of the housing defining the intake passage.

4. The exhaust gas recirculation device according to claim 1, wherein the housing includes a gas guide device guiding the EGR gas, which flows into the intake passage through the outlet opening, toward a downstream direction of the intake air.

5. The exhaust gas recirculation device according to claim 1, wherein the throttle valve includes at least one through-hole communicating the upstream side of an intake air and a downstream side of the intake air with respect to the throttle valve with each other.