Back to results
US 2017/0363031 A1Published application
Method for diagnosing a vacuum actuator
AssigneeFord Global Technologies, LLC
InventorsDouglas Raymond Martin, Gilbert Fournelle
Life of this patent
Estimating the term…
Abstract
Methods and systems are described for diagnosing degradation of a vacuum actuator in an engine system. An example method comprises indicating degradation of the vacuum actuator based on an estimate of flow of air into and out of a vacuum reservoir. The estimate is further based on flow of air generated via each of an aspirator in the intake system, an actuation of the vacuum actuator, and leakage during the actuation of the vacuum actuator.
Claims15
A method, comprising:
- indicating degradation of a vacuum actuator based on an estimate of flow of air into and out of a vacuum reservoir, the estimate based on flow of air generated via each of an aspirator in an intake system, an actuation of the vacuum actuator, and leakage during the actuation of the vacuum actuator.
10-14. (canceled)
A system, comprising:
- an engine with a cylinder, the cylinder fluidically communicating with an intake passage via an intake manifold;
- a charge motion control valve positioned in the intake passage downstream of an intake throttle;
- an actuator that actuates the charge motion control valve between an open position and a closed position;
- a vacuum reservoir fluidically communicating with each of the actuator, an aspirator, and the intake manifold;
- and
- a controller with computer-readable instructions stored in non-transitory memory for:
- actuating the charge motion control valve via the actuator;
- and
- indicating degradation of the actuator if the charge motion control valve remains motionless in response to the actuating when an amount of air fill in the vacuum reservoir is lower than a threshold.
6 more elements
Dependencies are inferred from the claim text.