Compact Fuel Valve Assembly for Two-Stroke Engines
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Solution Overview
Problem
Two-stroke internal combustion engines face challenges in controlling combustion to meet environmental regulations, leading to increased complexity and limited space for equipment, particularly around the fuel valve, exhaust valve, and other essential components.
Innovation Solution
A fuel valve assembly with a unique design featuring a first and second valve part where one part surrounds the other, utilizing a cylindrical fixation part with an elongated slit and a hole configuration that reduces space requirements by providing a resilient, space-efficient connection, allowing for a tight seal and optimal positioning of cooling channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional separate valve parts are used, then ease of manufacture is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines multiple valve parts (nozzle tip, pre-chamber, and connection elements) into a single integrated fuel valve assembly. The first and second valve parts are connected through a shared fixation part with a hole extending through both components, eliminating the need for separate mounting structures and reducing overall space requirements in the engine cover.
Solution Approach 2:
The design features one valve part surrounding another valve part in a nested configuration. Specifically, the first valve part has an outer face with a hole that extends through it and engages with the second valve part, creating a compact nested structure that minimizes the external dimensions of the assembly while maintaining functional separation of components.
2Area of stationary object
If more equipment is added for emission control, then reliability is improved, but space availability deteriorates
Solution Approach 1:
The integrated valve assembly consolidates multiple functions (fuel injection, pre-chamber operation, and structural support) into a single compact unit. This merging of functions frees up space in the engine cover that can then be allocated to additional emission control equipment such as sensors and cooling systems, while maintaining reliable combustion control through the unified design.
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 solution enables a compact fuel valve assembly that reduces space usage in the engine cover, optimizes cooling channel placement, and maintains a tight seal between valve parts, addressing the space constraints and complexity issues in two-stroke engines.
Implementation Method 1
a fixation part arranged in the hole, engaging the first valve part and the second valve part and connecting the first valve part and the second valve part
Implementation Method 2
the fixation part may be resilient in a radial direction to a longitudinal axis of the fixation part
Data Source
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AI summary
The present invention relates to a fuel valve assembly for controlling the injection of fuel into a combustion chamber of a two-stroke internal combustion engine, comprising a first valve part and a second valve part, where one of said valve parts comprises a portion at least partly surrounding a portion of the other valve part, wherein the one of said valve parts comprising a portion at least partly surrounding a portion of the other valve part has an outer face, the fuel valve assembly further comprising a hole extending from a first imaginary point of the outer face towards a second imaginary point of the outer face, intersecting the first valve part and the second valve part, and a fixation part arranged in the hole, engaging the first valve part and the second valve part and connecting the first valve part and the second valve part. The invention also relates to an internal combustion engine comprising a fuel valve assembly.