Spark-Ignition Engine Gas Supply Integration

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Solution Overview

Problem

Conventional spark-ignition engines lack integration of the gas supply device, making it impossible to combine the intake system and gas supply device with the engine.

Innovation Solution

A spark-ignition engine design that includes an intake manifold, throttle body, gas mixer, gas regulator, and gas relay pipe, where the gas regulator is mounted to the cylinder head above the flywheel and the gas relay pipe extends between the gas regulator and mixer, allowing for integration of the intake system and gas supply device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the gas regulator is not mounted to the engine, then the engine structure remains simple, but the intake system and gas supply device cannot be integrated with the engine

Engineering Contradiction:

Improveintegration of intake system and gas supply deviceVSAvoidengine structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The gas regulator is mounted directly to the cylinder head of the engine, merging the gas supply device with the intake system. The gas mixer is positioned in the collector portion of the intake manifold, and the gas relay pipe connects these components, creating an integrated system where the gas supply device becomes part of the engine structure rather than a separate attachment.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of manufacture

If the gas mixer is mounted to the front portion of the collector portion, then the gas supply is simplified, but the location is limited and may cause heat and vibration damage

Engineering Contradiction:

Improvegas supply configurationVSAvoidheat and vibration damage

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The gas mixer is repositioned from the front portion of the collector portion to the back portion, utilizing the available space in a different spatial dimension. This relocation moves the gas mixer away from the high-heat and high-vibration zones near the engine front, while still maintaining effective gas supply functionality through the reconfigured gas relay pipe routing.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

Enables the integration of the intake system and gas supply device with the engine, facilitating vaporization of gaseous fuels and efficient fuel mixing, while preventing heat and vibration damage to components.

Implementation Method 1

facilitating vaporization of gaseous fuels and efficient fuel mixing

Methodology Applied

Scientific EffectVaporization: Evaporation

Data Source

PatentUS9951684B2Spark-ignition engine

Publication Date: 2018.04.24 KUBOTA CORP

AI summary

There is provided a spark-ignition engine with which a gas supply device and an intake system can be integrated with the engine. In the spark-ignition engine including: a throttle body; a gas mixer; a gas regulator; and a gas relay pipe, a collector portion of an intake manifold is supported to extend in a front-back direction on one side of a cylinder head cover, the throttle body is mounted to a back portion of the collector portion of the intake manifold, the gas mixer is mounted to a back portion of the throttle body above a flywheel, the gas regulator is disposed on a side of an exhaust manifold above the flywheel and mounted to a cylinder head, and the gas relay pipe is supported to extend sideways between the gas regulator and the gas mixer behind the cylinder head cover.