Injector Removal Tool Pivot Mechanism Fuel Pipe Integration
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Solution Overview
Problem
Existing injector removal tools require disconnecting fuel pipes from injectors, increasing man-hours for removal and reinstallation, and complicating the process due to the need for precise alignment.
Innovation Solution
An injector removal tool with a support platform and hanger system that allows injectors to be removed without disconnecting fuel pipes, using a pivot mechanism to apply an upward force through a U-shaped locking portion, enabling the removal of injectors with the fuel supply pipes and common rail as a unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If injectors are removed individually using threaded portions, then the injector can be removed from the cylinder head, but the fuel pipe must be disconnected which increases man-hours and complicates reinstallation
Solution Approach 1:
The invention merges the injector removal operation with the fuel pipe assembly by designing a tool that engages both the injector body and the fuel pipe simultaneously. The tool's first arm portion engages the injector's threaded portion while the second arm portion engages the fuel pipe, allowing both components to be removed together as a single unit, thereby eliminating the time-consuming disconnection step
Solution Approach 2:
The tool performs preliminary engagement of both the injector and fuel pipe before the removal force is applied. The engagement portions are designed to secure both components in advance, ensuring they remain connected throughout the removal process and can be reinstalled together without requiring precise alignment operations
2Ease of operation
If injectors are removed individually, then the injector can be extracted, but precise alignment with the fuel pipe is required during reinstallation which complicates the work
Solution Approach 1:
By combining the injector and fuel pipe into a single removable unit using the dual-engagement tool, the invention eliminates the alignment complexity inherent in separate reinstallation. The tool ensures both components are reinstalled together in their correct relative positions, removing the need for precise manual alignment operations
Solution Approach 2:
The tool acts as an intermediary device that maintains the spatial relationship between the injector and fuel pipe during removal and reinstallation. The connecting structure of the tool preserves the original positioning, serving as a temporary fixture that eliminates the need for complex alignment procedures
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
Reduces man-hours and simplifies the removal and reinstallation process by allowing the injector unit to be removed and reinstalled without disassembling the fuel system, minimizing the risk of damage to the injectors and reducing the need for frequent replacement of flared nuts.
Implementation Method 1
a pivot portion (120) having a fulcrum; a pair of arm portions (124) extending from each other in parallel in a radial direction of the pivot portion (120) with the fulcrum interposed therebetween
Implementation Method 2
by inputting a torque into the pivot portion (120), an upward removing force can be applied on the injectors (30) by use of the principle of leverage
Data Source
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AI summary
There is provided an injector removal tool for removing an injector from a cylinder head. A support platform is fixed to the cylinder head. A pivot portion is mounted on the support platform. A arm portion is provided so as to rotate on the pivot portion as a fulcrum. A transfer portion is supported on the arm portion at one end in a position lying spaced away from the pivot portion and is locked on the injector at the other end thereof. A force exerted on the one end to rotate the arm portion is transferred as a force to remove the injector at the other end.