Fuel pump and method for operating a fuel pump

A fuel pump and fuel technology, which is applied to fuel injection pumps, components of pumping devices for elastic fluids, fuel injection devices, etc., can solve problems such as damage to volumetric efficiency and function, and achieve compact and save structure and cost. , the effect of saving cost and space
CN106460748BActive Publication Date: 2022-04-05ROBERT BOSCH GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ROBERT BOSCH GMBH
Publication Date
2022-04-05

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Abstract

The invention relates to a fuel pump (1) comprising a piston (2), an actuator (3) for operating the piston (2), a reset device for returning the piston (2) into an initial position The element (4), the first inlet valve (5), the outlet valve (6) and the delivery chamber (7), are characterized in that a forestage chamber (8) and a second inlet valve (9) are provided, the second inlet The valve closes or releases the connection between the delivery chamber and the foreline chamber. The invention also relates to a method for the two-stage delivery of fuel by means of a fuel pump ( 1 ) according to the invention.
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Description

technical field

[0001] The invention relates to a fuel pump for supplying fuel in vehicles such as motorcycles, jet skis or other small motor applications such as chainsaws and a method for operating such a fuel pump. The invention also relates to a fuel tank comprising such a fuel pump. Background technique

[0002] Such a fuel pump is for example disclosed by GB 2478876 B. This is a fuel pump, in particular an electromagnetic piston pump, which has a piston, an actuator for actuating the piston, a reset element for restoring the piston into a starting position, an inlet valve, a delivery chamber and an outlet valve. During the suction phase, fuel is sucked through the inlet valve into the delivery chamber by actuation of the piston. During the delivery phase, fuel is delivered from the delivery chamber via the outlet valve. Due to the temperature load, at low suction pressures, fuel can vaporize out at the inlet valve, whereby the delivery chamber is largely filled with...

Claims

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