EXHAUST GAS RECIRCULATION VALVE Russian patent published in 2001 - IPC

FIELD: mechanical engineering; exhaust systems pf internal combustion engines. SUBSTANCE: proposed exhaust gas recirculation valve has body with seat, guide bushing, spaces communicating with intake and exhaust systems of internal combustion engine and shutoff valve with rod moving inside guide bushing. Diaphragm mechanism is fastened to body and is provided with spacer, deflecting cup, cover with vacuum supply union and spring. Diaphragm is clamped between deflecting cup and cover and is connected with rod of shutoff valve. Collar is placed between diaphragm plate and guide bushing. Collar prevents getting of exhaust gases into under- diaphragm space and into atmosphere. Collar is secured by its inner diameter with interference in ring slot of guide bushing, and is clamped by outer diameter between plate of diaphragm and cup. Shutoff valve is freely fitted on bushing connected with rod by thread providing possibility of adjustment of rod length and fixing of bushing relative to rod. EFFECT: reduced toxicity of exhaust gases, improved technology manufacture and adjustment. 2 cl, 2 dwg