Rollover Valve Stopper and Convex Cavity Floor Design
Solution Overview
Problem
Fuel delivery systems for internal combustion engines face challenges in preventing fuel loss during rollover situations and ensuring efficient fuel delivery, particularly in applications where space is limited and multiple components need to be integrated without increasing complexity or cost.
Innovation Solution
A fuel delivery system with a vent tube and a rollover valve arrangement that includes a stopper and a convex portion on the floor of the cavity, designed to seal the vent tube during rollover events, along with an integrated modular design incorporating a high-pressure fuel pump and pressure regulator within a compact housing, eliminating the need for additional return lines and allowing for universal compatibility with various engines and vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional vent tube design is used, then fuel delivery simplicity is maintained, but fuel loss during rollover situations occurs
Solution Approach 1:
The rollover valve assembly is designed to automatically respond to rollover conditions without external control. The stopper component self-actuates by moving under the influence of gravity and spring force when the engine orientation changes, closing the vent tube passage to prevent fuel loss. This self-service mechanism eliminates the need for sensors, actuators, or complex control systems while reliably preventing fuel loss during rollover events.
2Volume of moving object
If multiple components are integrated into a compact housing, then space efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The fuel delivery system is divided into distinct functional modules: the high-pressure fuel pump assembly, the pressure regulator assembly, and the rollover valve assembly. Each module is designed and manufactured separately as an independent unit, then assembled into the compact housing. This segmentation allows each component to be optimized for its specific function and manufactured using standard processes, while the final assembly achieves compact integration without excessive manufacturing complexity.
3Reliability
If a rollover valve arrangement is added to the vent tube, then fuel loss prevention is improved, but device complexity increases
Solution Approach 1:
The rollover valve functionality is extracted as a separate, self-contained assembly that interfaces with the vent tube rather than being integrated into the vent tube structure itself. The stopper, spring, and housing components form an independent module that can be manufactured and tested separately before installation. This extraction approach prevents fuel loss during rollover events while minimizing the impact on the overall vent tube design and reducing the complexity increase to acceptable levels.
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
The system effectively prevents fuel loss during rollovers and ensures efficient fuel delivery by integrating key components, reducing complexity and cost, and allowing for flexible mounting on different engines and vehicles without excessive protrusion, thus enhancing operational reliability and adaptability.
Implementation Method 1
a stopper in the cavity for sitting in the seat during a rollover situation
Implementation Method 2
the floor including a convex portion protruding from the floor
Data Source
AI summary
A system includes a fuel delivery system of an engine, the fuel delivery system including a vent tube, walls providing a seat and forming a cavity at an opening of the vent tube, a floor of the cavity, the floor including a convex portion protruding from the floor, and a stopper in the cavity for sitting in the seat during a rollover situation.