Combustion engine exhaust return under valve control

摘要

The two temperature measuring points of the single thermocouple (T1) act as first and second temperature sensors and a second thermocouple records the temperature difference between the air temperature in the intake tube (2) and the exhaust temperature in the exhaust return (8). The entry of this exhaust return into the intake tube (2) is designed as a mixing chamber (G) and the temperature measuring points (C,D,E,F) of the thermocouples lead to and from the mixing chamber (G). The exhaust return valve (B) has an actuator (I) as electric motor or electromagnet. The thermocouples, mixing chamber and gas return valve (B) are connected up into a single unit together with the pressure control flap or choke flap used to govern the suction pressure of the exhaust line (2). The actuators (H,I) are also joined into this unit. The exhaust return rate is governed by an equation involving thermocouple measurements and air, suction mixture and exhaust isobaric thermal capacities and the control devices determine loss and mixture ratios with the aid of engine parameters.