초록 ▼

An exhaust gas return control system for internal combustion engines is proposed, which includes an apparatus case 19 in which a servo motor 45 is disposed, which through a driving gear 47 and a driven gear 36 drives a threaded spindle 35 on which an exhaust gas valve closing member 41 is disposed w

An exhaust gas return control system for internal combustion engines is proposed, which includes an apparatus case 19 in which a servo motor 45 is disposed, which through a driving gear 47 and a driven gear 36 drives a threaded spindle 35 on which an exhaust gas valve closing member 41 is disposed which cooperates with an exhaust gas valve seat 27 on a tubular exhaust gas valve seat body 24. The apparatus case has on the side of the servo motor an air inlet of an air duct 13, 15 leading to the air induction pipe 2 of the internal combustion engine and, on the exhaust gas valve side, an exit from this air duct through which the proportionally fed exhaust gas is also led. A guiding collar 44 diverts the entry of the exhaust gas to an exhaust pipe 30 provided for the purpose. Also, in one embodiment an air valve seat body 21 radially surrounding the exhaust gas valve seat body 24 is provided, which cooperates with an air valve closing member which can be actuated simultaneously with the exhaust gas valve closing member and through which bypass air branched off upstream from a throttle valve 3 in the air induction pipe 2 can be proportionally fed.

대표청구항 ▼

An exhaust gas return control system for an internal combustion engine having an air induction pipe and an exhaust pipe, comprising: an exhaust gas return duct leading from the exhaust pipe; an exhaust gas valve communicating with said exhaust gas return duct; a servo system for controlling the amou

An exhaust gas return control system for an internal combustion engine having an air induction pipe and an exhaust pipe, comprising: an exhaust gas return duct leading from the exhaust pipe; an exhaust gas valve communicating with said exhaust gas return duct; a servo system for controlling the amount of exhaust gas flowing through said exhaust gas return duct through said exhaust gas valve in accordance with operating parameters of the internal combustion engine, said servo system having an actuating member, a transmission and an electric motor; an air duct leading from and to the air induction pipe; said exhaust gas return duct discharging into said air duct; an exhaust gas valve closing member; a tubular exhaust gas valve seat body in said air duct, enclosing inside an exhaust gas flow cross section and leaving free outside an air flow cross section to the wall of said air duct, which exhaust gas flow cross section is more or less openable or closable by said exhaust gas valve closing member which is actuatable by said actuating member of said servo system driven by said electric motor through said transmission, said electric motor being disposed for exposure to air flowing within said air duct upstream from said exhaust gas valve.