Abnormality determination device for variable geometry turbocharger
AssigneeMitsubishi Heavy Industries, Ltd.
InventorMitsufumi Goto
Life of this patent
Estimating the term…
Abstract
The present application relates to an abnormality determination device for a variable geometry turbocharger having a nozzle mechanism capable of changing a flow path area of exhaust gas with an actuator. The abnormality determination device includes: a first detection part configured to be capable of detecting at least one of a load of the actuator or supply energy to the actuator; and a determination part configured to determine that an abnormality is present, if a detection result by the first detection part is out of an allowable range corresponding to an operational state of the variable geometry turbocharger.
Claims8
An abnormality determination device for a variable geometry turbocharger having a nozzle mechanism capable of changing a flow path area of exhaust gas with an actuator, the abnormality determination device comprising:
- a first detection part configured to detect at least one of a load of the actuator and an amount of energy supplied to the actuator;
- a determination part configured to determine that an abnormality is present, if a detection result by the first detection part is outside of an allowable range corresponding to an operational state of the variable geometry turbocharger:
- a second detection part configured to detect the operational state of the variable geometry turbocharger;
- and
- a storage part configured to store a map which defines a relationship between the operational state of the variable geometry turbocharger and the allowable range,
- wherein the determination part is configured to set the allowable range corresponding to the operational state detected by the second detection part on the basis of the map, and
- wherein the map comprises a plurality of maps prepared corresponding to an opening degree of the nozzle mechanism.
An abnormality determination device for a variable geometry turbocharger having a nozzle mechanism capable of changing a flow path area of exhaust gas with an actuator, the abnormality determination device comprising:
- a first detection part configured to detect at least one of a load of the actuator and an amount of energy supplied to the actuator;
- and
- a determination part configured to determine that an abnormality is present, if a detection result by the first detection part is outside of an allowable range corresponding to an operational state of the variable geometry turbocharger:
- wherein the first detection part is configured to detect both of the load of the actuator and the amount of energy supplied to the actuator, and
- wherein the determination part is configured to determine that an abnormality is present in an energy supply path to the actuator, if the load of the actuator is small with respect to the supply energy to the actuator.
An abnormality determination device for a variable geometry turbocharger having a nozzle mechanism capable of changing a flow path area of exhaust gas with an actuator, the abnormality determination device comprising:
- a first detection part configured to detect at least one of a load of the actuator and an amount of energy supplied to the actuator;
- a determination part configured to determine that an abnormality is present, if a detection result by the first detection part is outside of an allowable range corresponding to an operational state of the variable geometry turbocharger;
- a housing to which a reaction force of the actuator is applicable;
- and
- a piezoelectric element interposed between the actuator and the housing,
- wherein the first detection part is configured to detect the load of the actuator on the basis of an output voltage of the piezoelectric element.
Dependencies are inferred from the claim text.