Automotive Transmission Valve Body Separator Plate Modification
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Solution Overview
Problem
The existing pressure control systems in Daimler Chrysler 46RE, 47RE, and 48RE automotive transmissions face imbalances in pressure values due to varying horsepower and torque, particularly when towing, leading to excessive pressure in certain gears and components, making it difficult to adjust for different vehicle loads without resorting to expensive or time-consuming solutions.
Innovation Solution
The modification involves replacing the existing separator plate with new cooperating separator plates to internally re-route the hydraulic fluid flow within the valve body, blocking certain existing circuits and creating new ones, without adding external passageways, to achieve a more balanced and flexible pressure control system, simulating the operation of a 48RE transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external passageways are added to modify hydraulic circuitry, then pressure control flexibility is improved, but device complexity and installation time increase
Solution Approach 1:
The patent uses nesting by installing new separator plates within the existing valve body structure. The new plates are nested between the valve body and the existing separator plates, allowing modification of hydraulic circuitry without adding external components. This nested approach maintains a compact design while achieving the desired pressure control flexibility.
Solution Approach 2:
The patent changes the dimension of modification from external additions to internal reconfiguration. By modifying the separator plates that are already present in the valve body and reconfiguring the internal hydraulic passages, the system achieves enhanced pressure control without increasing external complexity or requiring additional external passageways.
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
This approach results in improved operational efficiency and balance across all gear ranges, including higher boost pressure in 4th gear and TCC, increased towing capacity, and enhanced off-road capabilities, while maintaining normal reverse pressure, thus addressing the pressure imbalances and deficiencies in the original systems.
Implementation Method 1
The internal re-routing of the hydraulic flow within the valve body is accomplished by replacing the existing separator plate with one or more new cooperating separator plates, and by plugging portions of the existing hydraulic circuitry
Data Source
AI summary
A method for modifying the hydraulic circuitry of factory installed 46RE, 47RE and 48 RE automotive transmissions internally re-routes the flow of hydraulic fluid within the valve body of the automotive transmission to improve the overall operation of these factory installed automotive transmissions, without adding or installing any external passageway structures to the valve body. The internal re-routing of the hydraulic flow within the valve body is accomplished by replacing the existing separator plate with one or more new cooperating separator plates, and by plugging portions of the existing hydraulic circuitry, to internally re-route the flow of hydraulic fluid within the valve body by blocking certain existing internal hydraulic circuitry and by creating new internal hydraulic circuitry for fluid flow within the valve body. The modified 46RE and 47RE transmissions exhibit improved operating characteristics, simulating the operation of a 48RE automotive transmission.