Abnormality detecting apparatus for an air temperature sensor
First Claim
1. An abnormality detecting apparatus for detecting an abnormality of an air temperature sensor which detects a temperature of air in an engine compartment of a vehicle, said abnormality detecting apparatus comprising:
- warmed state determining means for determining whether an engine in said engine compartment is in a predetermined warmed state;
vehicle stop determining means for determining whether said vehicle is stopped; and
sensor abnormality determining means for determining whether said air temperature sensor is abnormal based on a detected temperature of said air temperature sensor, a determination of said sensor abnormality determining means being performed when said warmed state determining means determines that said engine is in the predetermined warmed state and said vehicle stop determining means determines that said vehicle is stopped.
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Accused Products
Abstract
An abnormality detecting apparatus for an air temperature sensor which can detect an abnormality of the air temperature sensor with high reliability. The determination of abnormality is performed based on a detected temperature of the air temperature sensor when it is determined that the engine is in a sufficiently warmed state and when it is determined that the vehicle is stopped. The determination may be performed based on a temperature detected by the air temperature sensor during a predetermined period after a start of the engine when the start of the engine is detected and when it is determined that the engine is in the sufficiently warmed state. Additionally, the determination may be performed based on a temperature detected by the air temperature sensor after detecting a start of a cooling fan.
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Citations
16 Claims
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1. An abnormality detecting apparatus for detecting an abnormality of an air temperature sensor which detects a temperature of air in an engine compartment of a vehicle, said abnormality detecting apparatus comprising:
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warmed state determining means for determining whether an engine in said engine compartment is in a predetermined warmed state; vehicle stop determining means for determining whether said vehicle is stopped; and sensor abnormality determining means for determining whether said air temperature sensor is abnormal based on a detected temperature of said air temperature sensor, a determination of said sensor abnormality determining means being performed when said warmed state determining means determines that said engine is in the predetermined warmed state and said vehicle stop determining means determines that said vehicle is stopped. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An abnormality detecting apparatus for detecting an abnormality of an air temperature sensor which detects a temperature of air in an engine compartment of a vehicle, said abnormality detecting apparatus comprising:
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warmed state determining means for determining whether an engine in said engine compartment is in a predetermined warmed state; engine start detecting means for detecting a start of said engine; and sensor abnormality determining means for determining whether said air temperature sensor is abnormal based on a change in a temperature detected by said air temperature sensor during a predetermined time period after the start of said engine, a determination of said sensor abnormality determining means being performed when the start of said engine is detected by said engine start detecting means and when said warmed state determining means determines that said engine is in the predetermined warmed state. - View Dependent Claims (8, 9, 10)
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11. An abnormality detecting apparatus for detecting an abnormality of an air temperature sensor which detects a temperature of air in an engine compartment of a vehicle, said abnormality detecting apparatus comprising:
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cooling fan start detecting means for detecting a start of a cooling fan; and sensor abnormality determining means for determining whether said air temperature sensor is abnormal based on a change in a temperature detected by said air temperature sensor after the start of said cooling fan is detected by said cooling fan start detecting means. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification