Truck Cab HVAC Control for Openings and Driver Absence
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Solution Overview
Problem
Air-conditioning and heating systems in driving cabs consume excessive energy when windows, doors, or roof hatches are opened, leading to increased energy consumption and reduced vehicle range due to temperature fluctuations.
Innovation Solution
A method that determines the status of the driving cab based on the presence of the driver and opening conditions, adjusting the air-conditioning and heating system elements accordingly to conserve energy by stopping or reducing their operation when the driver is absent and external temperatures are within certain ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the air-conditioning and heating system operates continuously to maintain targeted temperature, then driver comfort is guaranteed, but energy consumption increases excessively
Solution Approach 1:
The system dynamically adjusts its operation based on real-time detection of driver presence and window/door opening status. When the driver is present and windows are closed, the system maintains targeted temperature. When the driver is absent or windows are opened, the system reduces or stops operation, thereby adapting its behavior to current conditions to optimize energy consumption while maintaining comfort when needed.
Solution Approach 2:
The system uses sensors to continuously monitor driver presence (via seat sensors, steering wheel sensors, or camera systems) and window/door opening status. This feedback information is processed by the control unit to automatically adjust the air-conditioning and heating system operation, creating a closed-loop control that responds to actual cabin conditions rather than operating continuously regardless of state.
2Temperature
If the air-conditioning and heating system increases heat/cold production in response to temperature changes from opened windows or doors, then targeted temperature is maintained, but energy consumption increases and vehicle range is limited
Solution Approach 1:
The system dynamically responds to temperature changes based on the detected state of windows and doors. When windows or doors are detected as open, the system adjusts its response by reducing or stopping operation instead of continuously compensating for temperature changes, thereby limiting energy consumption while accepting temporary temperature variations that do not compromise driver safety or comfort.
3Use of energy by moving object
If the air-conditioning and heating system stops all elements to reduce energy consumption, then energy efficiency improves, but driver comfort and cab temperature control are compromised
Solution Approach 1:
The system dynamically determines the appropriate level of operation based on detected conditions. When the driver is present and windows are closed, the system maintains full operation to ensure comfort. When the driver is absent or windows are opened, the system reduces or stops operation to save energy. This dynamic adjustment ensures comfort is maintained only when actually needed, avoiding unnecessary energy consumption during periods when comfort requirements are reduced or absent.
Data Source
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AI summary
The invention concerns a method for controlling an air-conditioning and heating system (48) of a driving cab (12) of a truck (10), comprising the following steps : a) a first step of determining a status of the driving cab (12), a first status being determined if no driver is present and one opening (36, 40, 44) is opened, b) if the first status is determined, the method comprising a second step of measuring the exterior ambient temperature, b1) if the exterior ambient temperature is inside a predetermined range, the method comprising a third step of stopping at least some of the elements of the system (48), or b2) if the exterior ambient temperature is outside the predetermined range, the method comprising a fourth step of stopping some of the elements of the system (48) and maintaining the functioning of at least one element (50, 52) of the system (48).