Additional heating device for motor vehicle, has recycling circuit with valve to control flow of exhaust gas, and bypass with another valve to control exhaust gas returning to exhaust manifold, where valves are controlled by controller

摘要

#CMT# #/CMT# The device has an exchanger (1) for cooling exhaust gas which is cooled by engine coolant (2). The exchanger is connected in parallel with a coolant circuit which is connected to a unit heater. An exhaust gas recycling circuit has a valve (4) to control the flow of recycled exhaust gas to an engine intake (3). The circuit has a bypass (7) for directing the exhaust gases towards an exhaust manifold (6) of the engine, where the bypass has a valve (8) to control the exhaust gas returning to the manifold, and the valves (4, 8) are controlled by a controller (5). #CMT#USE : #/CMT# Used for heating a cab interior of a motor vehicle (claimed). #CMT#ADVANTAGE : #/CMT# The valves are controlled by the controller, thus permitting to obtain good pollution control of the gas, and the additional heating of the unit heater, while permitting good functioning of the engine. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows an exhaust gas recycling circuit. 1 : Exchanger 2 : Engine coolant 3 : Engine intake 4, 8 : Valves 5 : Controller 6 : Exhaust manifold 7 : Bypass.