DPF energy conservation
First Claim
1. An exhaust gas treatment system for treating an exhaust gas, the exhaust gas treatment system comprising:
- a first section having at least one exhaust gas treatment component;
a bypass section having a bypass valve and a heater, the heater being downstream of the bypass valve, the heater being configured to elevate the temperature of at least a portion of the exhaust gas; and
a second section in fluid communication with the first section and the bypass section, the second section including a selective catalytic reduction system;
wherein the bypass valve is in a closed position when the exhaust gas satisfies a threshold condition such that the exhaust gas flows through the first section and to the second section, and wherein the bypass valve is in an open position when the exhaust gas does not satisfy the threshold condition such that at least a portion of the exhaust gas in the exhaust gas treatment system flows through the bypass section and to the second section.
9 Assignments
0 Petitions
Accused Products
Abstract
An exhaust gas treatment system for treating an exhaust gas. The exhaust gas treatment system includes a first section, a bypass section, and a common second section. The first section may include a first valve and at least one exhaust gas treatment component, such as, for example, a DOC and/or DPF. The bypass section may include a bypass valve and a heater that is configured to elevate the temperature of at least a portion of the exhaust gas. The second section is in fluid communication with the first section and the bypass section and includes a selective catalytic reduction system. Further, exhaust gas may be diverted into the bypass section when the exhaust gas fails to satisfy the threshold condition, so that the heater may elevate the temperature of the passing exhaust gas.
19 Citations
15 Claims
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1. An exhaust gas treatment system for treating an exhaust gas, the exhaust gas treatment system comprising:
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a first section having at least one exhaust gas treatment component; a bypass section having a bypass valve and a heater, the heater being downstream of the bypass valve, the heater being configured to elevate the temperature of at least a portion of the exhaust gas; and a second section in fluid communication with the first section and the bypass section, the second section including a selective catalytic reduction system; wherein the bypass valve is in a closed position when the exhaust gas satisfies a threshold condition such that the exhaust gas flows through the first section and to the second section, and wherein the bypass valve is in an open position when the exhaust gas does not satisfy the threshold condition such that at least a portion of the exhaust gas in the exhaust gas treatment system flows through the bypass section and to the second section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An method for treating an exhaust gas in an after treatment system, the method comprising:
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diverting the exhaust gas into a first section of the after treatment system when the exhaust gas satisfies a threshold condition, the first section including at least one exhaust gas treatment component; diverting the exhaust gas into a bypass section of the after treatment system when the exhaust gas does not satisfy the threshold condition, the bypass section including a heater that is configured to elevate the temperature of at least a portion of the exhaust gas; and delivering the exhaust gas through the first or bypass sections to a second section of the after treatment system, the second section including a selective catalytic reduction system. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification