公开(公告)号：US3775971A

公开(公告)日：1973-12-04

申请号：US3775971D

申请日：1972-03-28

Applicant: SAAB SCANIA AB

Inventor： GADEFELT B

IPC: F01N3/20 ,  F02B1/04 ,  F02B37/16 ,  F02D21/08 ,  F02M1/00 ,  F02B37/04 ,  F02B41/10

CPC classification number: F02D21/08 ,  F01N2340/04 ,  F01N2610/03 ,  F01N2610/08 ,  F02B1/04 ,  F02B37/166 ,  F02M1/00 ,  F02M26/05 ,  Y02T10/144

Abstract: The present invention relates to a system for controlling the supply of air to an internal combustion engine having a supercharging unit which includes an exhaust turbine and a compressor driven thereby, there being arranged in an exhaust line between the engine and the supercharging unit an afterburner to which is fed fresh air from the compressor of the supercharging unit and fuel supplied from a fuel pump. According to the present invention an electrically driven air pump is arranged to feed supplementary air to the afterburner, and also recirculation means are provided for returning a portion of the exhaust gases from the afterburner to the engine via the exhaust turbine. In this way the torque characteristic of the engine is improved, and also the content of contaminating solid products in the exhaust gases is reduced.

Abstract translation: 本发明涉及一种用于控制向内燃机供给空气的系统，该内燃机具有包括排气涡轮机和由此驱动的压缩机的增压装置，在发动机与增压装置之间的排气管线中配置有再加热器 其从增压单元的压缩机和从燃料泵供给的燃料供给新鲜空气。 根据本发明，电动空气泵被布置成将辅助空气供给到再加力器，并且还设置有再循环装置，用于将排气的一部分从后燃器经由排气涡轮返回到发动机。 以这种方式，发动机的扭矩特性得到改善，并且废气中污染固体产物的含量减少。