Patent ID: 8267070
Filing Date: 2012-09-18
Classification: F02B,F02M,Y02T

Abstract:
1. An intake mixture introducing apparatus that introduces gas from a common gas passage into intake paths independently provided for each cylinder of an internal combustion engine provided with a plurality of cylinders, via gas introduction passages independently provided for each intake path, comprising: a gas pressure adjusting mechanism that adjusts the pressure of gas introduced into the intake paths via the gas introduction passages and that is provided in the common gas passage in accordance with the positions where the gas introduction passages are arranged, wherein the gas pressure adjusting mechanism adjusts the pressure of the gas introduced into the intake paths by causing a change in the gas pressure at inlets of the gas introduction passages using gas flow inside the gas passage, said inlets being arranged at selected positions in view of the pressure distribution generated with the gas flow, wherein the gas pressure adjusting mechanism is provided for one or two or more of the gas introduction passages, and adjusts the pressure of the gas introduced into the intake paths such that a difference in the pressure of the gas introduced into the intake paths is reduced, wherein the gas pressure adjusting mechanism provides a curve in the gas passage and adjusts the gas pressure at the inlets using a pressure changing effect of the curve on the gas flow, wherein the gas pressure adjusting mechanism provides the curve by forming the gas passage in a serpentine shape, wherein a plurality of the gas pressure adjusting mechanisms which adjust the gas pressure to different levels are arranged in the direction of gas flow in the gas passage so as to adjust the gas pressure at the inlets, and wherein the gas pressure adjusting mechanisms are arranged so as to reduce the pressure farther upstream of the gas introduction passages and increase the pressure farther downstream of the gas introduction passages.