Vehicle HVAC Sensor Processing Split for Flexible Software Updates
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Solution Overview
Problem
The integration of multiple vehicle components into a central control unit for a heating, ventilation, and air conditioning (HVAC) system leads to software development delays due to the need for coordinating software updates among various suppliers, reducing flexibility in software development.
Innovation Solution
A device with a separate processing unit connected to an interior temperature sensor, which receives and processes measurement signals from various sensors, calculates core climate control functions, and communicates with a central operating and control unit via bus communication, decentralizing climate control functions and allowing for flexible software updates without altering the central unit's software.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple vehicle components are integrated into a central control unit, then production costs are reduced through consolidated computing power, but software development flexibility is reduced due to coordination requirements among multiple suppliers
Solution Approach 1:
The control system is segmented into a central control unit for general vehicle component control and a separate dedicated processing unit for HVAC-specific climate control functions. This segmentation allows independent software development and updates for the HVAC system without requiring coordination with other vehicle component suppliers, thereby maintaining production cost efficiency while restoring software development flexibility.
2Productivity
If software functions for multiple vehicle components are concentrated in one control unit, then computing resources are optimized, but software update coordination becomes complex and delays development
Solution Approach 1:
The processing unit is divided into two distinct software components: a central control unit handling general vehicle functions and a dedicated HVAC control software module handling climate control functions. This segmentation enables parallel independent development and testing of HVAC software, eliminating the need for complex coordination with other suppliers and reducing software development time while maintaining efficient computing resource utilization.
3Adaptability or versatility
If climate control functions are decentralized to a separate processing unit, then software development flexibility is improved, but device complexity increases
Solution Approach 1:
A standardized communication interface acts as an intermediary between the central control unit and the dedicated HVAC processing unit. This intermediary layer manages the complexity of inter-unit communication through well-defined protocols and data formats, allowing the system to benefit from decentralized software development flexibility while masking the underlying structural complexity from developers and users.
Data Source
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AI summary
The invention relates to a device for operating an air conditioning system (12) of a vehicle. The air conditioning system has a fan, a plurality of actuating motors for controlling flaps on and/or in air-conducting channels, a heating and/or a cooling unit, and a plurality of sensors (28, 30) for sensing measurement variables required for the operation of the heating, ventilation and/or air conditioning system. The sensors (28, 30) include an interior temperature sensor (26). The device has an operating and control unit (32) for inputting a desired temperature and for outputting air conditioning control signals for the control of components of the air conditioning system. The device also has a processing unit (40), which is arranged outside of and/or separate from the operating and control unit (32) and to which measurement signals from the interior temperature sensor (26) and from at least some of the other sensors (28, 30) of the air conditioning system can be supplied and which processes said measurement signals further to form air conditioning control signals.