| 摘要 |
A long route, low pressure Exhaust Gas Recirculation (EGR) valve 500 comprising a three-port valve having a duct 510 with inlet 520 and outlet 530, the outlet 530 being provided with a compressor wheel seat 570, the duct 510 connecting an air intake duct (205, Fig. 3) with a turbocharger compressor (240, Fig. 3) inlet and being intercepted by a first flap 550; a passage 540 connecting a long route EGR circuit outlet with the duct 510 and being intercepted by a second flap 560, wherein the passage 540 is inclined with respect to the duct 510 by an angle of inclination (a) comprised between 30° and 70°; a distance (b) from a downstream outlet 585 of the passage 540 into the duct 510 to the compressor wheel seat 570 is between 0 and 2.5 times the diameter of the compressor wheel, and a distance (c) from the second flap 560 to an upstream outlet 565 of the passage 540 into the duct 510 is between 1 and 3 times the diameter of the passage 540. The duct 510 may have a tapered portion 590. |
