JTEKT has been granted a patent for a method to estimate friction force in vehicle power steering systems. The method utilizes a mathematical model to adjust motor torque based on measured input variables and calculated output parameters, enhancing the system’s performance and accuracy. GlobalData’s report on JTEKT gives a 360-degree view of the company including its patenting strategy. Buy the report here.
Smarter leaders trust GlobalData
Discover B2B Marketing That Performs
Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.
According to GlobalData’s company profile on JTEKT, Crankshaft ball bearings was a key innovation area identified from patents. JTEKT's grant share as of July 2024 was 47%. Grant share is based on the ratio of number of grants to total number of patents.
Method for estimating friction force in power steering systems
The granted patent US12060119B2 outlines a method for estimating the frictional force exerted on a portion of a vehicle's power steering system, which includes at least one motor that generates motor torque. The method involves several steps: first, it establishes a mathematical model that represents the power steering system, incorporating a frictional force model. The process continues with the measurement of input variables, followed by the calculation of output parameters using the mathematical model. Subsequently, the method measures output variables that reflect physical quantities similar to the calculated output parameters. By determining deviations between these outputs, the method allows for the correction of internal parameters within the mathematical model, ultimately leading to the estimation of the frictional force based on the corrected parameters.
Further details of the method include the use of a first-order mathematical model that accounts for the inertial properties of the power steering system. The frictional force can be modeled using a LuGre model, and the internal coefficients necessary for parameter correction are derived through Lyapunov's theorem. Input variables for the estimation process may include motor torque, steering wheel torque, lateral vehicle acceleration, or forces on the tie rods. Additionally, both the output parameter and output variable are related to the rotational speed of the motor, enhancing the accuracy of the frictional force estimation within the power steering system.
To know more about GlobalData’s detailed insights on JTEKT, buy the report here.
Data Insights
From
The gold standard of business intelligence.
Blending expert knowledge with cutting-edge technology, GlobalData’s unrivalled proprietary data will enable you to decode what’s happening in your market. You can make better informed decisions and gain a future-proof advantage over your competitors.
GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.
GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
