TH66014A - Exhaust gas recirculation system for internal combustion engines - Google Patents

Abstract

DC60 (12/04/47) In an exhaust recirculation system for an internal combustion engine, the EGR (exhaust recirculation) outlet pipe, connected to the engine's exhaust system, consists of an exhaust pipe located downstream from the catalytic converter. This recirculates exhaust gases from the engine back into the engine's intake system. The exhaust pipe from the intake system connects to the downstream end of the catalytic converter at its bend, and the EGR outlet pipe connects to the upper exhaust pipe on the side facing the bend. Simultaneously, the EGR outlet pipe connects to the upper exhaust pipe on the opposite side from auxiliary equipment such as an ACG (Access Control System) in relation to the catalytic converter. This method strengthens the EGR outlet pipe in the exhaust recirculation system for internal combustion engines. At the bend in the exhaust pipe, the EGR outlet pipe connects to the upper exhaust pipe on the side facing where the exhaust pipe bends. At the same time, the EGR outlet pipe connects to the upper exhaust pipe on the opposite side from auxiliary equipment such as the ACG in relation to the catalytic converter. This method allows for increased rigidity of the EGR outlet pipe.

Claims (4)

1. The exhaust gas recirculation system for internal combustion engines consists of an exhaust outlet pipe connected to the engine's exhaust system to recirculate exhaust gases into the engine's intake system. Specifically, the exhaust system includes an exhaust manifold attached to the engine's main unit via a flange, and an exhaust pipe installed in the space at the end of the exhaust manifold. The gas outlet pipe is connected to the exhaust pipe at one end and to the engine via a flange at the other end. The gas outlet pipe is shaped with a corrugated cross-section that helps cool the exhaust gases. The gas outlet pipe and flange are connected by clamps, which are welded to the flange to form a single unit. The clamps are connected to the gas outlet pipe at the end of the corrugated cross-section, guiding the gas flow from the exhaust system to the intake system. 2. A system as specified in Claim 1 where the fasteners are attached to the flange by welding to form a single unit. 3. The system as specified in Claim 1, where the clamp is welded to the flange to form a single unit, and the gas outlet pipe is welded to the flange at its end, which is inserted into a hole formed in the flange. 4. A system as defined in claim paragraph 3 where the diameter of the gas outlet pipe to the cross-section connecting to the main engine unit is greater than the diameter at the cross-section connecting to the main engine unit.