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US 7,251,932 B2Granted
Exhaust system and method for controlling exhaust gas flow and temperature through regenerable exhaust gas treatment devices
AssigneeSouthwest Research Institute
InventorYiqun Huang
Life of this patent
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Abstract
A reconfigurable exhaust system provides selective positioning of exhaust gas treatment devices either near, or spaced from, the exhaust gas outlet port of a turbine of a turbocharged Diesel engine. In some embodiments, auxiliary air or a heat exchanger are arranged to cool the exhaust gas when required.
Claims16
An exhaust system having a variable flowpath for exhaust gas produced by a Diesel engine, said engine having a turbocharger comprising a compressor and a turbine, said exhaust system comprising:
- a three-way engine-out exhaust control valve having an inlet port in direct fluid communication with an exhaust gas discharge port of said turbine, and first and second outlet ports;
- a regenerable exhaust gas treatment device having an inlet in direct communication with said first outlet port of the three-way engine-out exhaust control valve and a outlet spaced from said inlet;
- a second exhaust gas treatment device having an inlet in direct communication with said second outlet port of the three-way engine-out exhaust control valve and an outlet spaced from said inlet;
- a second three-way exhaust control valve having a first inlet port in communication with the outlet of said second exhaust gas treatment device, a second inlet port in communication with the inlet of said regenerable exhaust gas treatment device, and an outlet port in direct fluid communication with an ambient environment;
- and
- a third three-way exhaust control valve having an inlet port in direct communication with the outlet of said regenerable exhaust gas treatment device, and first and second outlet ports.
3 more elements
Dependencies are inferred from the claim text.