Delivery device for the fuel of an internal combustion engine
AssigneeHydac Fluidcarecenter GmbH
InventorsRichard Eberle, Thomas Scholl, Jonas Haupenthal
Life of this patent
Estimating the term…
Abstract
A delivery device for the fuel of an internal combustion engine has a fuel tank (4) from which at least one fuel pump (14, 18) delivers fuel via a fuel supply line (10) and via at least one fuel filter (12, 16) to a fuel consumer (2). The consumer (2) is connected to the fuel tank (4) via a fuel return line (20). A control device (24) is connected between the supply line (10) and the return line (20). The control device establishes a fuel-conveying connection (80) between the return line (20) and the supply line (10) when the temperature in the fuel tank (4) falls below a predeterminable threshold temperature and at a predeterminable threshold pressure in the return line (20).
Claims14
A delivery device for providing fuel to an internal combustion engine, the delivery device comprising:
- a fuel tank;
- a first fuel pump being connected in fluid communication via fuel supply line to the fuel tank and being connectable in fluid communication to the internal combustion engine;
- a first fuel filter in the fuel supply line downstream of the fuel tank;
- a fuel return line being connected in fluid communication to the fuel tank and being connectable in fluid communication to the internal combustion engine;
- and
- a control connected in fluid communication to and between the fuel supply line and the fuel return line, the control establishing a fluid communication connection between the fuel return line and the fuel supply line when fuel temperature in the fuel tank or fuel supply line is below a predeterminable threshold temperature providing a fuel flow from the fuel return line to the fuel supply line at a predeterminable threshold pressure in the fuel return line and blocking the fluid flow when the fuel temperature is above the threshold temperature, the control including a control housing having first and second ports connected in fluid communication by a fluid duct being in the control housing and forming a portion of the fuel supply line and including a thermostatic valve with a thermostatic element being arranged in a bottom of a recess in the control housing with most of a length of the thermostatic element extending through the bottom of the recess into the fluid duct, the thermostatic element controlling movement of a closing body of the thermostatic valve between open and closed positions of the fluid communication connection.
A control device for a fuel delivery device, the control device comprising:
- a housing with a continuous fluid duct extending between and connected in fluid communication between first and second ports connectable in a fuel supply line;
- a third port in the housing;
- a fluid connecting path extending between the third port and the fluid duct in the housing;
- and
- a thermostatic valve and a pressure valve in the fluid connecting path, the thermostatic valve establishing fluid communication between the third port and the fluid duct along the fluid connecting path when fluid in the fluid duct has a fluid temperature below a predeterminable threshold temperature at a predeterminable threshold pressure preset by the pressure valve and blocking the fluid connecting path when the fluid temperature is above the threshold temperature, the thermostatic valve having a thermostatic element in a bottom of a recess in the housing with most of a length of the thermostatic element extending through the bottom of the recess into the fluid duct and having a closing body moveable in the valve housing under control of the thermostatic element between an open position opening the fluid connecting path and a closed position blocking the fluid connecting path.
Dependencies are inferred from the claim text.