Valve Lash Adjustment System with Electronic Transducer
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Solution Overview
Problem
Existing methods for adjusting valve lash in internal combustion engines are laborious, time-consuming, and prone to errors due to accessibility and repeatability issues, with existing solutions being cumbersome and costly.
Innovation Solution
A valve lash adjustment system comprising a frame assembly with an engine head attachment and an instrument attachment portion, including a position sensor and display unit, a gap setting gauge assembly with a clip member, and a torque wrench with a hex key for precise adjustment of valve lash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual methods with feeler gauges are used to measure valve lash, then the measurement can be performed with simple tools, but the process is laborious, time-consuming and prone to minute errors
Solution Approach 1:
The patent replaces manual feeler gauge measurement with an automated electronic measurement system that uses a transducer to directly measure valve lash. The transducer converts mechanical displacement into electrical signals, eliminating the need for manual insertion and reading of feeler gauges, thereby improving measurement precision while maintaining ease of use through automated digital display.
Solution Approach 2:
The patent introduces a transducer as an intermediary device between the valve train components and the measurement system. This transducer acts as a mediator that directly contacts the valve or rocker arm and converts physical valve lash into measurable electrical signals, providing more accurate and repeatable measurements compared to direct manual feeler gauge insertion.
2Measurement precision
If center-to-center distance measurement method is used, then valve lash can be determined based on known probe diameters and measured distance, but the process is cumbersome and requires repeated checks
Solution Approach 1:
The patent extracts the direct measurement function from the indirect center-to-center distance calculation method. Instead of measuring the distance between probe centers and calculating valve lash through subtraction of known probe radii, the system directly measures valve lash using a transducer positioned to contact the valve or rocker arm, eliminating the need for complex calculation and repeated verification.
Solution Approach 2:
The patent replaces the mechanical center-to-center distance measurement system with an electronic transducer-based direct measurement system. The transducer provides direct electrical measurement of valve lash, eliminating the need for mechanical probe positioning, distance measurement, and mathematical calculation, thereby reducing device complexity and measurement steps.
3Measurement precision
If holding means, moving means, and driving means are added to the probes, then the measurement capability is enhanced, but the cost of measuring equipment increases
Solution Approach 1:
The patent employs a self-service measurement approach where the transducer automatically positions itself and performs the measurement without requiring separate holding means, moving means, or driving means. The transducer is designed to be self-contained with internal positioning and measurement mechanisms, eliminating the need for additional complex components and reducing overall equipment cost while maintaining measurement precision.
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 provides accurate and efficient measurement and adjustment of valve lash, reducing errors and improving accessibility, allowing for easier maintenance and optimal engine performance.
Implementation Method 1
an instrument assembly including at least one position sensor and at least one display unit. The at least one position sensor is attached to the engine head attachment portion of the frame assembly
Implementation Method 2
the second end of the clip member is resiliently attached to the frame assembly
Data Source
AI summary
A valve lash adjustment system for setting a valve to a rocker arm clearance for a valve train associated with a particular combustion cylinder for an engine is disclosed. The valve lash adjustment system includes a frame assembly including an engine head attachment portion and an instrument attachment portion. The engine head attachment portion of the valve lash adjustment system is removably attachable to the engine and the instrument attachment portion is selectively positionable relative to the engine head attachment portion. The valve lash adjustment system also includes an instrument assembly including at least one position sensor and at least one display unit. The valve lash adjustment system further includes a gap setting gauge assembly having a clip member.