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US 6,964,261 B2Granted
Adaptive fuel injector trimming during a zero fuel condition
AssigneePerkins Engines Company Limited
InventorsDavid G. Warne, John Renshaw
Life of this patent
Estimating the term…
Abstract
Apparatuses and methods for controlling a fuel injector. A fuel shot is injected during a zero fuel condition. A rail pressure drop corresponding to the fuel shot is determined. A change in engine speed corresponding to the fuel shot is determined. An adjustment to the fuel injection as a function of the rail pressure drop and the corresponding change in engine speed is determined.
Claims16
An apparatus for controlling a fuel injector, comprising:
- a rail pressure sensor coupled with a rail of the fuel injector and operable to transmit a rail pressure signal as a function of the rail pressure during a zero fuel condition;
- an engine speed sensor operable to be coupled with an engine, the engine speed sensor operable to transmit an engine speed signal as a function of the engine speed of the engine during the zero fuel condition;
- and
- a controller coupled with the rail pressure sensor to receive the rail pressure signal and with the engine speed sensor to receive the engine speed signal, the controller operable to transmit an injection signal to the fuel injector that is operable to cause the fuel injector to inject fuel into the engine, the controller further operable to determine an adjustment to the injection signal as a function of the rail pressure signal and the engine speed signal received during the zero fuel condition.
1 more element
A method for controlling a fuel injector, comprising:
- injecting a fuel shot during a zero fuel condition;
- determining a rail pressure drop corresponding to the fuel shot;
- determining a change in engine speed corresponding to the fuel shot;
- and
- determining an adjustment to the fuel injection as a function of the rail pressure drop and the corresponding change in engine speed.
2 more elements
Dependencies are inferred from the claim text.