Apparatus for detecting abnormality in internal combustion engine-related device and power output system with such apparatus
First Claim
1. An abnormality detection apparatus for detecting abnormality of an internal combustion engine-related device, whose state is varied by a driving condition of an internal combustion engine, said abnormality detection apparatus comprising:
- physical quantity measurement means for measuring a physical quantity that reflects a state of said internal combustion engine-related device;
engine operation control means for controlling operation of said internal combustion engine to a predetermined driving condition, in response to a predetermined instruction; and
abnormality detection means for detecting abnormality of said internal combustion engine-related device based on said physical quantity, when said engine operation control means causes said internal combustion engine to be driven under said predetermined driving condition.
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Abstract
After an elapse of a predetermined time period or after a run of a predetermined distance, a power output system of the present invention heats a catalytic converter with a catalyst heater while enabling an engine to be driven under a driving condition suitable for checking a catalyst packed in the catalytic converter for deterioration of the catalytic function. The power output system then measures a variation in temperature of the catalyst in this state and determines whether or not the variation is within a normal range, thereby detecting the deteriorating catalytic function of the catalyst, that is, abnormality of the catalytic converter. This structure enables the power output system to realize accurate detection of abnormality of the catalytic converter at a sufficient frequency. During the measurement of the temperature change of the catalyst, an assist motor is driven and controlled to output a torque Td* corresponding to a step-on amount of an accelerator pedal to a drive shaft. This enables a desired power to be output to the drive shaft even during the course of the abnormality detection. Detection of abnormalities in an engine supercharger and exhaust gas recirculation system is also provided.
46 Citations
20 Claims
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1. An abnormality detection apparatus for detecting abnormality of an internal combustion engine-related device, whose state is varied by a driving condition of an internal combustion engine, said abnormality detection apparatus comprising:
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physical quantity measurement means for measuring a physical quantity that reflects a state of said internal combustion engine-related device; engine operation control means for controlling operation of said internal combustion engine to a predetermined driving condition, in response to a predetermined instruction; and abnormality detection means for detecting abnormality of said internal combustion engine-related device based on said physical quantity, when said engine operation control means causes said internal combustion engine to be driven under said predetermined driving condition. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power output system for utilizing energy taken out of an internal combustion engine and outputting power to a drive shaft, said power output system comprising:
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said internal combustion engine; an internal combustion engine-related device, whose state is varied by a driving condition of said internal combustion engine; a motor connecting with said drive shaft, whereby power is transmitted between said motor and said drive shaft; electric power supply means for supplying electric power required for the transmission of the power by said motor; physical quantity measurement means for measuring a physical quantity that reflects the state of said internal combustion engine-related device; engine operation control means for controlling operation of said internal combustion engine to a predetermined driving condition, in response to a predetermined instruction; and abnormality detection means for detecting abnormality of said internal combustion engine-related device based on the physical quantity measured by said physical quantity measurement means, when said engine operation control means causes said internal combustion engine to be driven under the predetermined driving condition. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification