Method and control unit for determining the probability of failure of a motor-vehicle component
First Claim
1. A method for determining a failure probability of a component of a motor vehicle, the method comprising:
- monitoring data in the form of damage-relevant influence parameters, which affect the failure probability of the component;
storing the data during operation of the component; and
evaluating the influence parameters in a control unit of the motor vehicle to determine the failure probability during the operation of the component, wherein the failure probability is determined within a scope of the evaluating of the influence parameters, by comparing a collective-damage sum, which is a measure of an accumulated loading of the component that is determined with the aid of the influence parameters, and a tolerable-damage sum of the component determined in preliminary stages of the evaluating of the influence parameters.
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Accused Products
Abstract
A method and control unit for determining the failure probability of a component of a motor-vehicle. Data in the form of damage-relevant influence parameters, which affect the failure probability of the component, are measured and stored during the operation of the component. To ascertain the failure probability, a collective loading is calculated as a determining influence parameter for establishing the fatigue limit of the component. To determine the collective loading as realistically as possible and therefore determine the failure probability as accurately as possible, the influence parameters may be evaluated during the operation of the component, in a control unit of the motor-vehicle for determining the failure probability.
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Citations
17 Claims
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1. A method for determining a failure probability of a component of a motor vehicle, the method comprising:
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monitoring data in the form of damage-relevant influence parameters, which affect the failure probability of the component;
storing the data during operation of the component; and
evaluating the influence parameters in a control unit of the motor vehicle to determine the failure probability during the operation of the component, wherein the failure probability is determined within a scope of the evaluating of the influence parameters, by comparing a collective-damage sum, which is a measure of an accumulated loading of the component that is determined with the aid of the influence parameters, and a tolerable-damage sum of the component determined in preliminary stages of the evaluating of the influence parameters. - View Dependent Claims (2, 3, 4, 5)
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6. A method for determining a failure probability of a component of a motor vehicle, the method comprising:
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monitoring data in the form of damage-relevant influence parameters, which affect the failure probability of the component;
storing the data during operation of the component; and
evaluating, during the operation of the component, the influence parameters in a control unit of the motor vehicle to determine the failure probability of the component;
wherein the failure probability is determined for the component which is one of;
at least one of a direct-injecting fuel-injection system and a common-rail fuel-injection system of an internal combustion engine; and
a braking system of a motor vehicle.
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7. A method for determining a failure probability of a component of a motor vehicle, the method comprising:
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monitoring data in the form of damage-relevant influence parameters, which affect the failure probability of the component;
storing the data during operation of the component; and
evaluating the influence parameters in a control unit of the motor vehicle to determine the failure probability during the operation of the component, wherein the failure probability is determined for the component which is one of;
at least one of a direct-injecting fuel-injection system and a common-rail fuel-injection system of an internal combustion engine; and
a braking system of a motor vehicle, andwherein a collective-damage sum, which is a measure of an accumulated loading of the component that is determined with the aid of the influence parameters, and a tolerable-damage sum of the component determined in preliminary stages of the evaluating of the influence parameters are each determined for at least one of a joint common rail, an injector body, a housing of a high-pressure pump, and a cylinder head of the high-pressure pump.
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8. A method for determining a failure probability of a component of a motor vehicle, the method comprising:
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monitoring data in the form of damage-relevant influence parameters, which affect the failure probability of the component;
storing the data during operation of the component; and
evaluating the influence parameters in a control unit of the motor vehicle to determine the failure probability during the operation of the component, wherein the failure probability is determined for the component which is one of;
at least one of a direct-injecting fuel-injection system and a common-rail fuel-injection system of an internal combustion engine; and
a braking system of a motor vehicle, andwherein an injection pressure prevailing in the fuel-injection system is measured and stored as one of the influence parameters during operation of the fuel-injection system.
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9. A control unit for controlling a motor-vehicle function implementable by at least one component, comprising:
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an arrangement to measure and store data in the form of damage-element influence parameters, which affect a failure probability of the component during operation of the component; and
an arrangement to evaluate the influence parameters for determining the failure probability of the component, wherein the control unit includes an arrangement to determine the failure probability within a scope of the evaluating of the influence parameters, by comparing a collective-damage sum, which is a measure of an accumulated loading of the component that is determined with the aid of the influence parameters, and a tolerable-damage sum of the component determined in preliminary stages of the evaluating of the influence parameters. - View Dependent Claims (10, 11, 12, 13)
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14. A control unit for controlling a motor-vehicle function implementable by at least one component, comprising:
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an arrangement to measure and store, during operation of the component, data in the form of damage-element influence parameters, which affect a failure probability of the component; and
an arrangement to evaluate, during operation of the component, the influence parameters for determining the failure probability of the component;
wherein the failure probability is determined for the component which is one of;
at least one of a direct-injecting fuel-injection system and a common-rail fuel-injection system of an internal combustion engine; and
a braking system of a motor vehicle.
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15. A control unit for controlling a motor-vehicle function implementable by at least one component, comprising:
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an arrangement to measure and store data in the form of damage-element influence parameters, which affect a failure probability of the component during operation of the component; and
an arrangement to evaluate the influence parameters for determining the failure probability of the component, wherein the failure probability is determined for the component which is one of;
at least one of a direct-injecting fuel-injection system and a common-rail fuel-injection system of an internal combustion engine; and
a braking system of a motor vehicle, andwherein a collective-damage sum, which is a measure of an accumulated loading of the component that is determined with the aid of the influence parameters, and a tolerable-damage sum of the component determined in preliminary stages of the evaluating of the influence parameters are each determined for at least one of a joint common rail, an injector body, a housing of a high-pressure pump, and a cylinder head of the high-pressure pump.
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16. A control unit for controlling a motor-vehicle function implementable by at least one component, comprising:
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an arrangement to measure and store data in the form of damage-element influence parameters, which affect a failure probability of the component during operation of the component; and
an arrangement to evaluate the influence parameters for determining the failure probability of the component, wherein the failure probability is determined for the component which is one of;
at least one of a direct-injecting fuel-injection system and a common-rail fuel-injection system of an internal combustion engine; and
a braking system of a motor vehicle, andwherein an injection pressure prevailing in the fuel-injection system is measured and stored as one of the influence parameters during operation of the fuel-injection system.
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17. A stored computer program, the computer program, when executed by a computer, causes the computer to perform the following steps:
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monitoring data in the form of damage-relevant influence parameters, which affect the failure probability of the component;
storing the data during operation of the component; and
evaluating the influence parameters in a control unit of the motor vehicle to determine the failure probability during the operation of the component, wherein the failure probability is determined within a scope of the evaluating of the influence parameters, by comparing a collective-damage sum, which is a measure of an accumulated loading of the component that is determined with the aid of the influence parameters, and a tolerable-damage sum of the component determined in preliminary stages of the evaluating of the influence parameters.
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Specification