Back to results
US 11,725,612 B1Granted
Method and system for rationalizing a temperature within an engine system
AssigneeFord Global Technologies, LLC
InventorsAdam Krach, Sumanth Reddy Dadam, Patrick Edward Smithberger, Kirk Pulay, Edward Doemer
Life of this patent
Estimating the term…
Abstract
Systems and methods for determining whether or not a temperature sensor is degraded are presented. In one example, a determination of degradation of the temperature sensor is based on a difference between a temperature determined from output of the temperature sensor and an estimate of a temperature of a pressure sensor.
Claims20
A method for assessing an output of a temperature sensor, comprising:
- generating an estimate of a temperature of a sensor coupled to an exhaust gas passage based on an engine coolant temperature and an ambient air temperature;
- and
- indicating whether or not the temperature sensor is degraded in response to the temperature of the sensor.
An exhaust gas recirculation system, comprising:
- an engine including an exhaust passage and an exhaust gas recirculation passage;
- an engine coolant temperature sensor;
- an ambient air temperature sensor;
- an exhaust gas recirculation valve coupled to the exhaust gas recirculation passage;
- a pressure sensor assembly including a temperature sensor, the pressure sensor assembly positioned downstream of the exhaust gas recirculation valve;
- and
- a controller including non-transitory instructions executable to generate an estimate of a temperature of the pressure sensor assembly via an ambient air temperature and an engine coolant temperature, and additional instructions to adjust operation of the engine in response to a difference between a temperature determined via the temperature sensor and the estimate of the temperature of the pressure sensor assembly.
4 more elements
A method assessing output of a temperature sensor, comprising:
- generating an estimate of a temperature of a sensor coupled to an exhaust gas passage based on a first time constant and a second time constant;
- and
- indicating whether or not the temperature sensor is degraded in response to the temperature of the sensor.
Dependencies are inferred from the claim text.