Modular Common Rail Assembly for Urea Injection Pressure Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing urea injection systems for high-power engines face challenges in maintaining stable pressure due to long pipelines, leading to significant pressure loss and increased costs associated with designing multiple common rails to meet different design requirements.
Innovation Solution
A scalable common-rail assembly comprising multiple connected common rails with integrated pressure detecting and adjusting devices, allowing for adjustable pressure control and efficient urea solution flow, which includes a pressure control valve to manage pressure and prevent air buildup, enabling stable pressure maintenance and cost-effective scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a common rail is designed for high-power engines with long pipelines, then the system can handle high power requirements, but pressure loss increases significantly
Solution Approach 1:
The common rail is divided into multiple modular segments that can be connected in series or parallel configurations. Each segment contains its own pressure control capabilities, allowing the system to maintain stable pressure even with long pipeline distances by breaking the long rail into shorter, manageable sections with distributed pressure management.
2Adaptability or versatility
If multiple common rails are designed to meet different design requirements, then system adaptability improves, but manufacturing cost increases
Solution Approach 1:
The common rail modules are designed with universal interfaces and standardized pressure control mechanisms that can be configured for different applications. The same basic module can serve multiple design requirements by changing the connection configuration and number of modules, eliminating the need to manufacture completely different rails for different applications.
Solution Approach 2:
The system allows dynamic configuration of common rail assemblies by connecting or disconnecting modular segments based on specific application requirements. This enables a single set of standardized modules to adapt to different pipeline lengths, pressure requirements, and engine configurations without requiring custom-manufactured rails for each scenario.
3Strength
If a cylindrical structure is used for the common rail, then pressure withstanding capability improves, but design flexibility is constrained
Solution Approach 1:
Instead of using a single long cylindrical rail, the system segments the rail into multiple modular units. Each module can maintain an optimized cylindrical shape for pressure resistance, while the modular connection allows flexible system configuration that adapts to different spatial and performance requirements.
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 solution provides a high-scalability urea injection system that effectively stabilizes pressure in high-power engine exhaust treatment systems, reducing costs and ensuring efficient operation by allowing for customizable common rail configurations and efficient pressure management.
Implementation Method 1
a pressure detecting device installed on said first housing; said pressure detecting device is connected to said first urea inlet channel
Implementation Method 2
a pressure adjusting device installed on said first housing; said pressure adjusting device is connected between said first urea inlet channel and said first urea outlet channel, and said pressure adjusting device can connect or disconnect said first urea inlet channel and said first urea outlet channel
Implementation Method 3
it is necessary to provide a common rail which can stabilize the system pressure
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A common rail assembly used in a urea injection system (100), comprising at least a first common rail (51) and a second common rail (52) which are connected to each other, wherein the first common rail (51) comprises a first housing (511), a pressure detecting device (512) mounted on the first housing (511) and a pressure adjusting device (513). The first housing (511) comprises a first urea inlet channel (5141), a first urea outlet channel (5151), at least one first feeding inlet (5142) connected to the first urea inlet channel (5141) and at least one first back-flow outlet (5152) connected to the first urea outlet channel (5151). The pressure detecting device (512) is connected to the first urea inlet channel (5141). The pressure adjusting device (513) can connect/disconnect the first urea inlet channel (5141) to/from the first urea outlet channel (5151). Also disclosed are a urea injection system and the application of the common rail assembly. A proper number of common rails selected based on different application requirements can be combined together by at least connecting the first common rail to the second common rail in series. The extension capability thereof is relatively high.