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US 6,382,184 B2Granted
Device for controlling fuel pressure of engine and method thereof
AssigneeUnisia Jecs Corporation
InventorsYoshitatsu Nakamura, Masaki Nakamura, Toru Kitayama
Life of this patent
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Abstract
In a fuel pressure control system of a non-return system which feedback controls the fuel pressure supplied to a fuel injection valve to meet the fuel supply amount, a fuel pressure in a fuel supply passage is feedback controlled to become a pressure corresponding to the engine environmental temperature condition of during the engine operation stop.
Claims10
A device for controlling the fuel pressure of an engine comprising:
- fuel pressure detecting means for detecting the fuel pressure supplied from a fuel pump to a fuel injection valve through a fuel supply passage equipped with a check valve;
- fuel pressure feedback control means for feedback controlling the drive of the fuel pump so that the fuel pressure in the fuel supply passage will become a target fuel pressure;
- operation stop detecting means for detecting an engine operation stop;
- engine environmental temperature detecting means for detecting an engine environmental temperature condition;
- and
- operation stop time fuel pressure adjusting means for adjusting the fuel pressure in the fuel supply passage, during the engine operation stop, to become a pressure that meets the engine environmental temperature condition during the engine operation stop, by said fuel pressure feedback control means.
3 more elements
A method of controlling the fuel pressure of an engine, comprising the steps of:
- detecting a fuel pressure supplied from a fuel pump to a fuel injection valve through a fuel supply passage equipped with a check valve;
- feedback controlling the drive of the fuel pump so that the fuel pressure in the fuel supply passage becomes a target fuel pressure;
- detecting an engine operation stop;
- detecting an engine environmental temperature condition when the engine operation stop is detected;
- and
- adjusting the fuel pressure in the fuel supply passage to meet the engine environmental temperature condition during the engine operation stop by feedback controlling the drive of the fuel pump.
3 more elements
Dependencies are inferred from the claim text.