Vehicle Compressor Control During Acceleration Load Changes
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Solution Overview
Problem
Compressors in vehicles operate excessively during acceleration, leading to reduced fuel efficiency and discomfort in the cabin due to inefficient torque management and temperature control.
Innovation Solution
A device and method that utilize a sensor module and controller to adjust compressor operation based on cabin, outdoor, and evaporator temperatures, along with throttle position and engine speed, to optimize compressor usage and temperature control during acceleration modes, reducing compressor load and maintaining cabin comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the compressor operates continuously to maintain cabin cooling, then cabin comfort is maintained, but fuel efficiency deteriorates during acceleration
Solution Approach 1:
The compressor operation is made dynamic by adjusting its capacity based on vehicle acceleration state. The control unit detects acceleration conditions and dynamically adjusts compressor capacity to reduce energy consumption during acceleration while maintaining appropriate cooling during normal operation
Solution Approach 2:
The system changes the operating parameters of the compressor based on acceleration detection. When acceleration is detected, the compressor capacity is reduced by adjusting the inclination plate angle, thereby changing the cooling output parameter to match reduced demand during acceleration
2Reliability
If the compressor operates at full capacity to ensure cooling performance, then cooling performance is maintained, but acceleration performance deteriorates due to excessive torque consumption
Solution Approach 1:
The system applies partial action by operating the compressor at reduced capacity during acceleration conditions. Instead of maintaining full cooling capacity, the system provides sufficient cooling for the reduced demand during acceleration, accepting temporary reduction in cooling performance to prioritize acceleration capability
3Use of energy by moving object
If the compressor operation is reduced during acceleration to improve fuel efficiency, then fuel efficiency improves, but cabin temperature control deteriorates
Solution Approach 1:
The control unit continuously monitors evaporator temperature and provides feedback to adjust compressor operation. When acceleration ends and cooling demand increases, the system detects evaporator temperature rise and increases compressor capacity to restore proper temperature control
Solution Approach 2:
The system prepares for post-acceleration cooling demand by monitoring acceleration state and preemptively adjusting compressor operation. When acceleration terminates, the control unit quickly restores compressor capacity to prevent excessive temperature rise in the cabin
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
Improves acceleration performance and fuel efficiency by reducing compressor operation during acceleration, while maintaining cabin comfort through intelligent temperature control.
Implementation Method 1
a condenser condensing and liquefying the cooling medium
Implementation Method 2
an evaporator evaporating the liquefied cooling medium
Implementation Method 3
the compressor compressing the cooling medium
Data Source
AI summary
A device and a method for a controlling compressor of vehicles may include a cabin temperature sensor, an outdoor temperature sensor, an evaporator temperature sensor, an engine speed sensor, and a throttle position sensor detecting a throttle opening, a condenser, an evaporator, a temperature control door controlling a temperature of an air flowed in a cabin, an intake door selectively flowing an inner air or an outer air in the cabin, and a blower blowing the air to the intake door, and a controller controlling an operation of the air conditioning system, wherein the controller decides a acceleration mode and an allowable temperature at each acceleration mode when an acceleration condition occurs, and decreases an operation of the compressor according to a difference between the evaporator temperature and the allowable temperature.