Particulate trap temperature sensor swap detection
First Claim
1. An exhaust after-treatment system, comprising:
- an exhaust-treatment device positioned in an exhaust flow of an engine;
an upstream temperature sensor disposed to measure a temperature of the exhaust flow upstream of the exhaust-treatment device;
a downstream temperature sensor disposed to measure a temperature of the exhaust flow downstream of the exhaust-treatment device; and
a controller receiving from the upstream and downstream temperature sensors indications of the upstream and downstream temperatures, the controller being configured to;
compare the upstream and downstream temperatures;
determine if the upstream and downstream temperature sensors are improperly swapped based on the comparison; and
trigger a precaution if it is determined that the upstream and downstream temperature sensors are improperly swapped.
1 Assignment
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Accused Products
Abstract
An exhaust after-treatment system is disclosed. The system has a particulate trap disposed to remove particulate matter from an exhaust flow of an engine, an upstream temperature sensor disposed to measure a temperature of the exhaust flow upstream of the particulate trap, and a downstream temperature sensor disposed to measure a temperature of the exhaust flow downstream of the particulate trap. The system also has a controller in communication to receive from the upstream and downstream temperature sensors indications of the upstream and downstream temperatures. The controller is configured to compare the upstream and downstream temperatures, determine if the upstream and downstream temperature sensors are improperly swapped based on the comparison, and take a precaution if it is determined that the upstream and downstream temperature sensors are improperly swapped.
37 Citations
20 Claims
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1. An exhaust after-treatment system, comprising:
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an exhaust-treatment device positioned in an exhaust flow of an engine; an upstream temperature sensor disposed to measure a temperature of the exhaust flow upstream of the exhaust-treatment device; a downstream temperature sensor disposed to measure a temperature of the exhaust flow downstream of the exhaust-treatment device; and a controller receiving from the upstream and downstream temperature sensors indications of the upstream and downstream temperatures, the controller being configured to; compare the upstream and downstream temperatures; determine if the upstream and downstream temperature sensors are improperly swapped based on the comparison; and trigger a precaution if it is determined that the upstream and downstream temperature sensors are improperly swapped. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for an exhaust treatment system, comprising:
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using an exhaust-treatment device in an exhaust flow of an engine; receiving from an upstream temperature sensor an indication of a temperature of the exhaust flow upstream of the exhaust-treatment device; receiving from a downstream temperature sensor an indication of a temperature of the exhaust flow downstream of the exhaust-treatment device; comparing the upstream and downstream temperatures; determining, by a controller associated with the exhaust treatment system, if the upstream and downstream temperature sensors are improperly swapped based on the comparison; and triggering a precaution if it is determined that the upstream and downstream temperature sensors are improperly swapped. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A machine, comprising:
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a combustion engine configured to power operations of the machine; and an exhaust after-treatment system, comprising; an exhaust-treatment device in an exhaust flow of an engine; an upstream temperature sensor disposed to measure a temperature of the exhaust flow upstream of the exhaust-treatment device; a downstream temperature sensor disposed to measure a temperature of the exhaust flow downstream of the exhaust-treatment device; and a controller in communication to receive from the upstream and downstream temperature sensors indications of the upstream and downstream temperatures, the controller being configured to; compare the upstream and downstream temperatures; determine if the upstream and downstream temperature sensors are improperly swapped based on the comparison; and trigger a precaution if it is determined that the upstream and downstream temperature sensors are improperly swapped. - View Dependent Claims (17, 18, 19, 20)
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Specification