Fuel Pump Valve Actuation via Delivery Flow
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Solution Overview
Problem
Existing pump devices require additional electrical actuators, increasing production costs and structural space while generating noise, which are not efficiently addressed by current technologies.
Innovation Solution
The pump device utilizes the delivery flow to open or close the valve, eliminating the need for an electrical actuator, thereby reducing costs and noise, and incorporates a control line to dynamically actuate the valve body, allowing for compact design and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrical actuator is used to open or close the valve opening, then the valve can be reliably actuated, but production costs increase and structural space is increased
Solution Approach 1:
The patent combines the valve actuation function with the delivery pump by using the delivery flow itself to actuate the valve body. The delivery pump and valve actuation mechanism are merged into a single integrated system, eliminating the need for a separate electrical actuator while maintaining reliable valve control.
Solution Approach 2:
The delivery pump uses its own delivery flow to actuate the valve body, creating a self-service system. The pump's operational flow is redirected through a control line to provide the actuating force needed to open or close the valve, eliminating external actuation components.
2Ease of operation
If an electrical actuator is used to open or close the valve opening, then the valve can be precisely controlled, but noise increases
Solution Approach 1:
The patent replaces the electrical actuator system with a hydraulic actuation system using the delivery flow. This substitution eliminates the electromagnetic components and mechanical linkages of an electrical actuator, thereby reducing noise while maintaining precise valve control through fluid pressure actuation.
3Device complexity
If the delivery pump is used to actuate the valve body, then production costs and structural space are reduced, but the pump device requires careful flow management
Solution Approach 1:
The patent segments the flow path into distinct sections: a connecting line, a bypass line branching from it, and a control line connecting the bypass line to the valve body receptacle. This segmentation allows independent control and management of different flow functions while maintaining overall system integration.
Solution Approach 2:
The bypass line acts as an intermediary flow path that branches from the connecting line and provides a controlled route for the delivery flow to reach the control line. This intermediary structure enables flexible flow management and protects the valve actuation system from direct exposure to the main delivery flow variations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces production costs, structural space, and noise by integrating the valve actuation into the delivery pump's operation, enabling a more compact and efficient pump device capable of performing tank leakage diagnosis and pressure build-up functions.
Implementation Method 1
the pressure of the delivery pump can be conducted via a control line to a surface, averted from the first valve seat, of the valve body. In this way, a dynamic pressure acts on the valve body, which forces the valve body in the direction of the first valve seat.
Implementation Method 2
a spring element, in particular a helical spring, a diaphragm or a corrugated bellows, is provided, which acts on the valve body with a returning action in the direction of the stop.
Data Source
AI summary
A pump device includes an electrical delivery pump, a first port for an air filter, a second port for a fuel tank, a valve opening, a connecting line, a bypass line, and an electrical switching valve. The connecting line connects the ports via the valve opening, which has a valve seat formed at the opening, a valve body receptacle, and a valve body configured to interact with the seat and adjustable in a direction of the seat by a delivery flow of the delivery pump. The bypass line branches off from the connecting line upstream of the opening, and has a throttled bypass outlet opening into the connecting line downstream of the opening. The switching valve has an electrical actuator, for example a magnet coil, operable to move the body. Such a pump device requires less structural space and reduced production costs relative to conventional pump devices.