초록 ▼

A low pressure EGR system suitable for use as a passive retrofit system is disclosed for moving vehicles equipped with a diesel engine. The EGR loop inlet is positioned upstream of the exhaust particulate filter and downstream of the turbine to utilize backpressure created by the exhaust particulate

A low pressure EGR system suitable for use as a passive retrofit system is disclosed for moving vehicles equipped with a diesel engine. The EGR loop inlet is positioned upstream of the exhaust particulate filter and downstream of the turbine to utilize backpressure created by the exhaust particulate filter to insure EGR flow in the loop. A catalyzed soot filter in communication with the EGR pickup insures cleansed EGR gases at the EGR return downstream of the air filter and upstream of the compressor. A corrugated EGR line provides cooling of the EGR gases.

대표청구항 ▼

[ Having thus defined the invention, it is claimed:] [1.]1. An EGR system for a vehicle equipped with a diesel engine having an intake manifold and an exhaust manifold comprising:a turbocharger having a compressor for supplying combustion air to said intake manifold and a turbine operatively connect

[ Having thus defined the invention, it is claimed:] [1.]1. An EGR system for a vehicle equipped with a diesel engine having an intake manifold and an exhaust manifold comprising:a turbocharger having a compressor for supplying combustion air to said intake manifold and a turbine operatively connected to said compressor for receiving exhaust gases from said exhaust manifold to operate said compressor;an exhaust particulate filter downstream of and in fluid communication with the outlet of said turbine for removing particulate matter from the exhaust gases;an EGR particulate filter positioned upstream of said exhaust particulate filter and downstream of said exhaust manifold;an intake air filter upstream of the compressor for supplying filtered combustion air to said compressor;a low pressure EGR line extending from an inlet downstream of said turbine to an outlet upstream of the compressor and downstream of the air filter;said inlet of said EGR line formed as a pick-up tube containing said EGR particulate filter whereby backpressure developed on the exhaust gases by the exhaust particulate filter in combination with vacuum developed at said EGR line outlet by filtered combustion airflow from the air filter induces a slip stream of the exhaust gases to travel through said EGR line from its inlet to its outlet.