Integrated Pressure Sensor in Valve Device Housing
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Solution Overview
Problem
Existing valve devices for internal combustion engines require additional structural space and are susceptible to inaccuracies due to pressure pulsations and condensate, limiting their adaptability and measurement accuracy.
Innovation Solution
A valve device with a pressure sensor integrated in the drive housing, where the pressure detection surface is perpendicular to the fluid flow, and a surge barrier surrounds the sensor, minimizing structural space requirements and protecting against pressure impulses and condensate, with a connecting channel that compensates for pressure peaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pressure sensor is arranged in the channel leading to the valve device, then pressure measurement is enabled, but additional electric connections and structural space are required
Solution Approach 1:
The pressure sensor is integrated into the valve device housing, merging the pressure measurement function with the existing valve structure. This eliminates the need for separate pressure sensor housing and reduces the number of electric connections required, as the sensor shares the valve device's electrical interface.
Solution Approach 2:
The valve device housing serves multiple functions: it houses the valve mechanism and simultaneously accommodates the pressure sensor. This multi-functional design reduces overall structural space requirements by eliminating dedicated space for separate pressure sensing components.
2Device complexity
If the pressure sensor is arranged above the electromagnet with narrow gaps for pressure detection, then structural space is reduced, but measuring results are delayed and inaccurate due to small cross sections
Solution Approach 1:
The pressure detection chamber is designed with an optimized geometry that provides sufficient cross-sectional area for accurate pressure measurement while maintaining a compact overall structure. The chamber's local dimensions are specifically tailored to balance space constraints with measurement quality, avoiding the narrow gaps that cause measurement delays.
Solution Approach 2:
A pressure equalization channel connects the fluid inlet channel to the pressure detection chamber, serving as an intermediary pathway. This channel provides a sufficient cross-section for pressure equilibrium without requiring the pressure sensor to be positioned in locations that would compromise measurement accuracy or require excessive structural space.
3Measurement precision
If the pressure detection surface is directly opposite the fluid inlet channel, then real-time pressure measurement is achieved, but the fluid inlet requires considerable structural space and the valve is susceptible to pressure pulsations and condensate
Solution Approach 1:
The pressure equalization channel acts as an intermediary between the fluid inlet and the pressure detection chamber. It transmits pressure information to the sensor while filtering out harmful effects such as pressure pulsations and condensate, thereby maintaining real-time measurement capability without direct exposure to the inlet's adverse conditions.
Solution Approach 2:
The pressure detection chamber is designed with sufficient volume to cushion against pressure pulsations before they reach the sensor. This cushioning effect dampens transient pressure variations and protects the measurement system from the harmful effects of pressure shocks and condensate accumulation.
4Measurement precision
If additional pressure detection space with pressure sensor is provided, then pressure measurement capability is achieved, but structural space increases and adaptability to different structural spaces is restricted
Solution Approach 1:
The pressure sensor is integrated into the existing valve device housing structure, merging the pressure measurement function with the valve assembly. This eliminates the need for additional dedicated space and allows the valve device to be adapted to different structural configurations without compromising pressure measurement capability.
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 accurate, real-time pressure measurements without structural space inefficiencies and insensitivity to pressure pulsations and condensate, allowing for flexible adaptation and reliable control of the valve.
Implementation Method 1
a pressure sensor arranged in the pressure detection chamber. The pressure sensor comprises a pressure detection surface arranged in a plane
Data Source
AI summary
A valve device for an internal combustion engine includes a drive unit. A drive housing in which the drive unit is arranged. A valve unit is configured to be moved by the drive unit. The valve unit comprises a valve rod and a valve closure member. A flow housing comprises a fluid inlet channel and a fluid outlet channel. A connection cross section of the fluid inlet channel and the fluid outlet channel is configured to be controlled by the valve closure member. A pressure detection chamber is fluidically connected with the fluid inlet channel. A pressure sensor is arranged in the pressure detection chamber and is integrated in the drive housing. The pressure sensor comprises a pressure detection surface arranged in a plane. A normal of the pressure detection surface is arranged so as to be perpendicular to a direction of a fluid flow into the pressure detection chamber.