Elastic Clamping Plate for Pump Fixation in Additive Delivery
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Solution Overview
Problem
Existing delivery units for liquid additives in exhaust gas treatment devices are complex, costly, and difficult to install and maintain, with a need for a simpler, more reliable, and easily removable solution that ensures secure fixation during vehicle operation.
Innovation Solution
A delivery unit with a housing that mounts on the tank, featuring a component carrier with a clamping plate that provides an elastic preload to secure the pump and other components, along with a filter to prevent impurities and a connection element for the additive line, ensuring efficient and secure delivery of the additive to the exhaust gas treatment device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex delivery unit design is used to ensure secure fixation of components, then reliability is improved, but device complexity increases and ease of installation deteriorates
Solution Approach 1:
The delivery unit is divided into a housing and a separate component carrier that can be independently assembled and installed. This segmentation allows the component carrier with pre-assembled components (pump, filter, connection elements) to be manufactured and tested separately, then simply installed into the housing, reducing overall system complexity while maintaining secure fixation through the bracing mechanism.
Solution Approach 2:
The clamping plate incorporates spring sections that provide elastic preload, creating a dynamic fixation mechanism. This elastic bracing adapts to manufacturing tolerances and thermal expansion while maintaining secure contact between components, ensuring reliable fixation without requiring complex rigid mounting structures.
2Reliability
If a complex delivery unit design is used to ensure secure fixation of components, then reliability is improved, but ease of installation deteriorates
Solution Approach 1:
The component carrier is designed as a separate, pre-assembled module containing the pump, filter, and connection elements. This modular approach allows the entire component carrier to be installed as a single unit into the housing, dramatically simplifying the installation process while maintaining secure fixation through the elastic bracing of the clamping plate.
Solution Approach 2:
Components are pre-assembled on the component carrier before installation into the housing. The spring sections of the clamping plate are pre-formed to provide elastic preload, and the component carrier is pre-configured with all necessary connections and filters, enabling rapid installation without complex on-site assembly procedures.
3Ease of repair
If traditional fixation methods are used, then ease of removal for maintenance is improved, but reliability during operation deteriorates
Solution Approach 1:
The elastic spring sections provide continuous preload that secures components during operation, while the modular component carrier design allows the entire assembly to be easily removed as one unit for maintenance. The elastic bracing naturally accommodates assembly and disassembly without requiring complex locking mechanisms.
Solution Approach 2:
The component carrier is designed as a removable module that can be easily extracted from the housing for maintenance. This segmentation allows the pump, filter, and connection elements to be accessed as a single unit, simplifying maintenance procedures while the elastic clamping plate ensures secure fixation during normal operation.
4Device complexity
If a simple delivery unit design is used to reduce cost, then device complexity is reduced, but reliability deteriorates
Solution Approach 1:
The spring sections in the clamping plate provide automatic elastic preload that ensures reliable component fixation without requiring complex adjustment mechanisms or multiple fasteners. This simple yet effective elastic bracing mechanism maintains secure contact between components while keeping the overall design simple and cost-effective.
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 simple, cost-effective, and reliable delivery unit that securely fixes components during operation, ensuring efficient delivery of the additive while allowing for easy installation and maintenance, with a high percentage of the housing within the tank for effective additive usage and secure attachment to the tank.
Implementation Method 1
at least the clamping plate or the component carrier has at least one spring section. The spring section of the clamping plate and/or of the component carrier is preferably under an elastic reload in order to brace the component carrier in the housing
Implementation Method 2
The at least one spring section of the clamping plate is preferably embodied as a bent and/or plastically deformed area of the clamping plate which is deformed elastically during installation and thus produces the elastic preload (which is permanent in the installed state)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a delivery unit (1) for delivering a liquid additive from a tank (2) into an exhaust gas treatment device (3), having at least a housing (4), which can be mounted on the tank (2), and a component carrier (5), which carries at least one pump (6) and is fixed in the housing (4) by means of a clamping plate (7).