Fuel Pump Plunger Counterweight Synchronization
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Solution Overview
Problem
Existing fuel pumps with counterweights to reduce vibrations become complex due to the need for additional actuating mechanisms and controllers to synchronize the counterweight's motion with the plunger's reciprocation.
Innovation Solution
A fuel pump design that synchronizes the motion of a movable element connected to a plunger and a counterweight using an electromagnet and a magnetic member, eliminating the need for additional drive mechanisms or controllers by utilizing springs to adjust the actuated amounts and maintain synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a counterweight is added to reduce vibrations, then vibration reduction is improved, but device complexity increases due to additional actuating mechanisms and controllers
Solution Approach 1:
The patent combines the counterweight actuation with the existing plunger actuation mechanism. The electromagnet that drives the plunger also drives the counterweight through magnetic coupling, merging two functions into one mechanism and eliminating the need for separate actuating mechanisms and controllers.
Solution Approach 2:
The patent introduces a magnetic coupling mechanism as an intermediary between the plunger and counterweight. This magnetic coupling allows the counterweight to be driven without direct mechanical connection, eliminating the need for additional mechanical linkages and controllers while maintaining synchronized motion.
2Object-affected harmful factors
If additional actuating mechanisms are provided for the counterweight, then vibration cancellation is improved, but the configuration becomes complex
Solution Approach 1:
The existing electromagnet mechanism is made multi-functional by using it to drive both the plunger and the counterweight. This universal application of a single actuator eliminates the need for additional specialized components while achieving vibration cancellation.
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 configuration simplifies the fuel pump design, reduces vibration deviations, and allows for synchronized reciprocation of the plunger and counterweight without additional mechanisms, enhancing vibration cancellation and reducing the risk of collision noise.
Implementation Method 1
The electromagnet is provided between the first movable element and the second movable element. The magnetic member is provided between the first movable element and the second movable element. The magnetic member is configured to attract both the first movable element and the second movable element when the electromagnet is energized.
Implementation Method 2
The first spring is configured to urge the first movable element and the second movable element so as to move away from each other.
Data Source
AI summary
A fuel pump includes a plunger that reciprocates inside a cylinder. The fuel pump includes a first movable element connected to the plunger, a second movable element that functions as a counterweight for preventing or reducing vibrations that are created by reciprocation of the first movable element, an electromagnet provided between the first movable element and the second movable element, a magnetic member that is provided between the first movable element and the second movable element and that attracts both the first movable element and the second movable element when the electromagnet is energized, and a first spring that urges the first movable element and the second movable element so as to move away from each other.