Fuel Injection Pump Adjuster Bolt Mounting Plate

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Solution Overview

Problem

Existing fuel injection pumps require modifications to the body for the attachment of an adjuster bolt, making it difficult to manufacture both versions with and without the adjuster bolt simultaneously without confusion in the manufacturing process.

Innovation Solution

A fuel injection pump design where the adjuster bolt is supported by a stay disposed on a plate, allowing for easy replacement and no need for body modifications, with the stay either formed separately and fixed to the plate or bent from the plate, and the adjuster bolt abutting against a shear plane of the control lever, reducing component count and manufacturing complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the adjuster bolt is attached to the body, then the fuel injection pump can adjust the fuel pressure-feed amount, but the body must be modified which increases manufacturing complexity

Engineering Contradiction:

Improveadjustability of fuel pressure-feed amountVSAvoidmodification of body

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention separates the adjuster bolt attachment function from the body by introducing a plate as an intermediate component. The plate is attached to the body and provides mounting holes for the adjuster bolt, thereby segmenting the structural functions and avoiding direct modification of the body.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The plate serves as an intermediary component between the body and the adjuster bolt. It provides the necessary mounting interface without requiring modifications to the body, thus mediating the attachment function while maintaining manufacturing simplicity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If both versions with and without adjuster bolt are manufactured simultaneously, then production flexibility is improved, but confusion in manufacturing process occurs

Engineering Contradiction:

Improvemanufacturing flexibilityVSAvoidmanufacturing process clarity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The plate is designed with multiple mounting holes that can accommodate either the adjuster bolt or the set bolt depending on the product variant. This universal design allows the same plate to be used in both versions, eliminating confusion in the manufacturing process while maintaining production flexibility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If the stay is formed by bending the plate, then the number of components is reduced, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvenumber of componentsVSAvoidmanufacturing process

Core Design Contradiction:

Device complexityVSEase of manufacture

Solution Approach 1:

The stay is formed by bending a portion of the plate itself, merging the stay function into the plate component. This eliminates the need for a separate stay component and reduces the total number of parts, while the bending process is a standard manufacturing operation that does not significantly increase process complexity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS10443554B2Fuel injection pump

Publication Date: 2019.10.15 YANMAR POWER TECH CO LTD

AI summary

A fuel injection pump includes a plunger, a plunger barrel which supports the plunger, a body which houses the plunger and the plunger barrel, a plate which covers an opening formed on the body, a control lever turnably attached near the plate, and an adjuster bolt which abuts against the control lever to restrict turn of the control lever and is supported by a stay disposed on the plate.