Engine parameter sampling and control method
AssigneeFord Global Technologies, LLC
InventorsMichael Uhrich, Ross Pursifull
Life of this patent
Estimating the term…
Abstract
A method for operating a fluid delivery system of a vehicle powerplant is provided. The method includes sampling a fluid pressure in a port injection section of the fluid delivery system, determining if an isolation valve positioned upstream of a direct injection pump is degraded based on the fluid pressure, where the isolation valve separates the port injection section from a direct injection section, and when it is determined that the isolation valve is degraded, indicating said degradation of the isolation valve.
Claims20
A method for operating a fluid delivery system in a vehicle powerplant, comprising:
- sampling a fluid pressure in a port injection section of the delivery system;
- determining if an isolation valve positioned upstream of a first pump is degraded based on the fluid pressure, where the isolation valve separates the port injection section from a direct injection section;
- and
- indicating isolation valve degradation in response to the determination.
A fluid delivery system in a vehicle powerplant comprising:
- a first pump in fluidic communication with a second pump, the second pump including an inlet opening into a tank;
- a second injector and a port rail receiving fluid from the second pump;
- a first injector receiving fluid from the first pump;
- an isolation valve positioned upstream of the first pump;
- and
- a controller with computer readable instructions stored on non-transitory memory that when executed cause the controller to:
- sample a port rail pressure;
- determine if the isolation valve is degraded based on the port rail pressure;
- and
- indicate degradation of the isolation valve in response to determining isolation valve degradation.
A method for operating a fluid delivery system comprising:
- sampling a fluid pressure in a port rail;
- generating a rail pressure profile based on the sampled fluid pressure;
- determining if an isolation valve positioned upstream of a pump is degraded when an amplitude of the rail pressure profile exceeds a threshold value;
- and
- indicating degradation of the isolation valve in response to determining isolation valve degradation.
Dependencies are inferred from the claim text.