Common-rail fuel injection system and related method
AssigneeNippondenso Co., Ltd.
InventorIsao Osuka
Life of this patent
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Abstract
A common-rail fuel injection system for an engine includes a common rail for storing fuel. A plurality of pumps supply fuel to the common rail. Fuel is injected into the engine from the common rail. Feedback control is executed on the pressure of the fuel in the common rail. A device serves to detect whether or not at least one of the pumps fails. An arrangement decreases the pressure of the fuel in the common rail when the detecting device detects that at least one of the pumps fails.
Claims15
A common-rail fuel injection system for an engine, comprising:
- a common rail storing fuel;
- a plurality of pumps supplying fuel to the common rail;
- means for injecting fuel into the engine from the common rail;
- means for feedback-controlling a pressure of the fuel in the common rail;
- means for detecting whether or not at least one of the pumps fails;
- and
- means for decreasing the pressure of the fuel in the common rail when said detecting means detects that at least one of the pumps fails.
In a common-rail fuel injection system for an engine which comprises a common rail storing fuel, a plurality of pumps supplying fuel to the common rail, means for injecting fuel into the engine from the common rail, and means for feedback-controlling a pressure of the fuel in the common rail, a method comprising the steps of:
- detecting whether or not at least one of the pumps fails;
- and
- decreasing the pressure of the fuel in the common rail when said detecting step detects that at least one of the pumps fails.
A common-rail fuel injection system for an engine, comprising:
- a common rail storing fuel;
- a plurality of pumps supplying fuel to the common rail;
- means for injecting fuel into the engine from the common rail;
- means for feedback-controlling a pressure of the fuel in the common rail;
- means for detecting whether or not at least one of the pumps fails;
- and
- means for decreasing a fuel supply quantity loaded on the pumps when said detecting means detects a pump failure.
In a common-rail fuel injection system for an engine which comprises a common rail storing fuel, a plurality of pumps supplying fuel to the common rail, means for injecting fuel into the engine from the common rail, and means for feedback-controlling a pressure of the fuel in the common rail, a method comprising the steps of:
- detecting whether or not at least one of the pumps fails;
- and
- decreasing a fuel supply quantity loaded on the pumps when said detecting step detects that at least one of the pumps has failed.
Dependencies are inferred from the claim text.