Pressurized fuel system for an engine, and method for operating a pressurized fuel system for an engine
AssigneeVolvo Truck Corporation
InventorDale Hoover
Life of this patent
Estimating the term…
Abstract
A pressurized fuel injection system for an engine includes a pressure sensor in a low pressure rail, an electronic pressure regulator valve in flow communication with and downstream from the low pressure rail and in flow communication with and upstream from a fuel supply, and a controller configured to receive a pressure signal from the pressure sensor and to control the electronic pressure regulator valve in response to the pressure signal to maintain a target pressure in the low pressure rail.
Claims22
A pressurized fuel injection system for an engine, comprising:
- a fuel supply,
- a high pressure rail in flow communication with and downstream from the fuel supply;
- at least one injector arrangement in flow communication with and downstream from the high pressure rail and arranged to inject fuel into a cylinder of the engine;
- a low pressure rail in flow communication with and downstream from the at least one injector arrangement and in flow communication with and upstream from the fuel supply;
- a pressure sensor in the low pressure rail;
- an electronic pressure regulator valve in flow communication with and downstream from the low pressure rail and in flow communication with and upstream from the fuel supply;
- a controller configured to receive a pressure signal from the pressure sensor and to control the electronic pressure regulator valve in response to the pressure signal to maintain a target pressure in the low pressure rail.
A method for operating a pressurized fuel injection system for an engine, the system comprising a fuel supply, a high pressure rail in flow communication with and downstream from fuel supply, at least one injector arrangement in flow communication with and downstream from the high pressure rail and arranged to inject fuel into a cylinder of the engine, a low pressure rail in flow communication with and downstream from the at least one injector arrangement and in flow communication with and upstream from the fuel supply, a pressure sensor in the low pressure rail, and an electronic pressure regulator valve in flow communication with and downstream from the low pressure rail and in flow communication with and upstream from the fuel supply, comprising:
- monitoring pressure in the low pressure rail with the pressure sensor and sending a pressure signal corresponding to the monitored pressure to a controller from the pressure sensor;
- and
- controlling the electronic pressure regulator valve in response to the pressure signal to maintain a target pressure in the low pressure rail.
Dependencies are inferred from the claim text.