Hydraulic Lash Adjustment Capsule for Engine Brake
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Solution Overview
Problem
Existing engine brake systems require active, mechanical adjustments for lash adjustment between the engine brake capsule assembly and the exhaust valve, which can be complex and time-consuming.
Innovation Solution
The implementation of an automatic lash adjustment system using a hydraulic capsule assembly that communicates with the rocker shaft, allowing for fluid-driven adjustment of the plunger position relative to the exhaust valve, eliminating the need for mechanical adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical adjustment is used for lash adjustment between the engine brake capsule assembly and the exhaust valve, then the adjustment can be made, but the system becomes complex and time-consuming
Solution Approach 1:
The patent replaces the mechanical adjustment mechanism with a hydraulic system. The hydraulic capsule assembly uses fluid pressure to automatically adjust the lash between the engine brake capsule assembly and the exhaust valve, eliminating the need for complex mechanical adjustment mechanisms and manual operations.
Solution Approach 2:
The hydraulic system enables the engine brake capsule assembly to self-adjust the lash automatically through fluid pressure changes, without requiring external mechanical adjustment operations. The system uses the existing hydraulic fluid in the engine to perform the adjustment function.
2Productivity
If mechanical adjustment is used for lash adjustment, then the adjustment function is achieved, but the process is time-consuming
Solution Approach 1:
The patent replaces slow mechanical adjustment with rapid hydraulic adjustment. The hydraulic capsule assembly uses fluid pressure to quickly move the plunger and adjust the lash, achieving the adjustment function in a fraction of the time required for mechanical methods.
Solution Approach 2:
The patent employs hydraulic principles to achieve rapid adjustment. The hydraulic fluid under pressure can quickly transmit force to adjust the plunger position, enabling fast lash adjustment compared to mechanical methods that require step-by-step mechanical movement.
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 solution enables efficient and automatic adjustment of the lash between the engine brake capsule assembly and the exhaust valve, improving the operational reliability and reducing mechanical complexity in engine brake systems.
Implementation Method 1
a hydraulic capsule assembly that communicates with the rocker shaft, allowing for fluid-driven adjustment of the plunger position relative to the exhaust valve
Data Source
AI summary
A rocker arm assembly includes an engine brake capsule assembly. The engine brake capsule assembly movable between a retracted position and an extended position. The engine brake capsule assembly comprises a body comprising a lower chamber and an upper chamber. The engine brake capsule assembly further comprises a plunger disposed partially within the lower chamber, wherein the plunger comprises an external shoulder disposed on a side of the plunger, and a locking pin configured to extend into the lower chamber and engage with the external shoulder of the plunger. The engine brake capsule assembly further comprises an actuation pin disposed within the upper chamber and extending down into an internal housing disposed within the lower chamber and a check ball valve assembly disposed within the plunger configured to selectively enable a hydraulic fluid into an internal chamber of the plunger.