AB Volvo has been granted a patent for a method to control the rotational speed of an electric motor-driven air compressor in vehicles. The method involves determining compressor efficiency, air consumption rates, and minimum rotational speeds to optimize performance and ensure efficient air supply to pneumatically operated systems. GlobalData’s report on AB Volvo gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on AB Volvo, Direct injection type engines was a key innovation area identified from patents. AB Volvo's grant share as of July 2024 was 55%. Grant share is based on the ratio of number of grants to total number of patents.
Method for controlling electric motor-driven air compressor speed
The patent US12066024B2 outlines a method for optimizing the rotational speed of an electric motor-driven air compressor that supplies compressed air to various pneumatically operated systems in vehicles. The method begins with assessing the efficiency of the air compressor at different rotational speeds, defined as the ratio of pneumatic power produced to the power supplied. Specific rotational speeds are identified where the compressor's efficiency exceeds a predetermined threshold, which is set at 0.6. The process continues by determining the air consumption rate of the connected pneumatic system and establishing a minimum rotational speed necessary to meet this demand. The method then involves controlling the compressor's speed based on whether specific efficiency values exceed this minimum, ultimately selecting the speed that offers the best efficiency when multiple values are available.
Additionally, the patent specifies that the efficiency assessment should be conducted at a minimum of four rotational speeds, ranging from over 500 rpm to under 5000 rpm. The pneumatically operated systems that can benefit from this method include braking, air conditioning, parking, and suspension systems. The patent also describes a control unit designed to implement the outlined method, as well as a vehicle configuration that integrates an electric motor, an air compressor, and a pneumatically operated system, all coordinated by the control unit. This innovation aims to enhance the efficiency and performance of air compressors in vehicles, contributing to improved energy management and operational effectiveness.
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