Electromagnetic Nozzle Pump for Fast Sensor Cleaning Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sensor cleaning systems in motor vehicles experience delayed pressure buildup at the cleaning nozzle due to hose line elasticity and liquid inertia, leading to inefficiencies in short spraying cycles.
Innovation Solution
A decentralized piston-cylinder spray pump with an electromagnetically actuated piston is integrated directly into the cleaning nozzle unit, minimizing hose line inertia and allowing for immediate pressure buildup and precise control of cleaning fluid delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a centralized washing-water pump with hose lines is used, then the system structure is simple, but the pressure buildup at the cleaning nozzle is delayed due to hose line elasticity and liquid inertia
Solution Approach 1:
The centralized pump system is segmented into decentralized piston-cylinder units, with each cleaning nozzle having its own integrated pump. This segmentation eliminates long hose lines and allows each unit to build pressure independently and immediately, resolving the delay caused by hose line elasticity and liquid inertia in centralized systems.
Solution Approach 2:
The piston-cylinder unit acts as an intermediary between the cleaning liquid reservoir and the cleaning nozzle. By placing this compact pump unit directly at the nozzle, it serves as a local pressure generation intermediary that eliminates the need for long hose lines, thereby eliminating the delay caused by hose line elasticity and liquid inertia.
2Speed
If a piston pump with external actuator and long piston rod is used, then the pump can be actuated, but the responsiveness is gradual due to the long runup time
Solution Approach 1:
The long piston rod and external actuator mechanism are extracted and replaced with a compact electromagnetic actuator integrated directly into the piston-cylinder unit. This extraction of the cumbersome mechanical transmission elements and their replacement with a direct electromagnetic actuation system enables immediate responsiveness without gradual buildup.
Solution Approach 2:
The mechanical piston rod and external actuator system is replaced with an electromagnetic actuator that directly moves the piston. This substitution of the mechanical transmission system with an electromagnetic system eliminates the gradual runup time and provides immediate actuation response.
3Adaptability or versatility
If cleaning liquid lines of large length are used, then the reservoir can supply multiple nozzles, but the inertia and elasticity of the lines cause delayed pressure buildup
Solution Approach 1:
The system segments the pressure generation function to each individual nozzle unit. Instead of one long hose line supplying multiple nozzles from a central pump, each nozzle has its own integrated piston-cylinder unit. This segmentation allows each unit to generate pressure immediately without being constrained by hose line length, while still maintaining the capability to supply multiple nozzles throughout the vehicle.
Solution Approach 2:
The pressure generation capability is distributed to local quality at each cleaning nozzle location. Each nozzle unit has its own piston-cylinder pump integrated directly at the nozzle, providing local pressure generation that is independent of hose line length. This local quality ensures immediate pressure buildup at each nozzle while maintaining system versatility.
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 design ensures quick responsiveness and consistent high pressure during spraying, improving the efficiency of the cleaning process by reducing delays and ensuring a defined amount of cleaning fluid per burst.
Implementation Method 1
the piston (20) is actuatable in a first direction, forming a compression direction, under the action of an electromagnetic force directed along the cylinder axis
Implementation Method 2
counter to the force of a spring
Data Source
AI summary
A cleaning unit for a window or a sensor in a motor vehicle includes a reservoir for a cleaning liquid, at least one cleaning nozzle provided in or on a cleaning nozzle unit, a fluid connection between the reservoir and the cleaning nozzle and at least one spray pump provided between the reservoir and the cleaning nozzle. The spray pump is formed by a piston-cylinder unit that has a cylinder axis and is provided in or on the cleaning nozzle unit. The cleaning unit is characterized in that the piston of the piston-cylinder unit is designed as an electromagnetically actuated piston, which can be actuated in a first direction under the action of an electromagnetic force directed along the cylinder axis, which first direction forms a compression direction.