A control system for an EGR-arrangement
Publication Date: 2003-Sep-29
The IP.com Prior Art Database
Conventional EGR arrangements have a first valve for regulating the supply of recirculating exhaust gases to the engine and a second valve for regulating the supply of air to the engine. An electric control unit is arranged to control a first control valves for supplying a first control pressure to the first valve and a second control valve for supplying a second control pressure to the second valve. According to the invention, the first valve and the second valve are connected to one control valve in parallel, which control valve supplies one and the same control pressure to the first valve and the second valve. A condition for this invention is that the first valve and the second valve work within different range of pressures. According to the invention, a simple and reliable control system of an EGR arrangement is obtained including few components.