Automotive Parts Industry SHAPING a BETTER FUTURE
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Special Feature: Automotive Parts Industry SHAPING A BETTER FUTURE SHAPING A BETTER FUTURE JTEKT’s evolving solutions Linkless Steer-by-Wire*1 4WD Driveline Systems A steering mechanism that has eliminated the mechanical linkage between the steering wheel and the tires Becoming a system supplier by adding a dierential*3 unit (Yutaka Seimitsu product) to our lineup • Providing system solutions for peace of Peace of mind, safety, and comfort by optimal Propeller shaft*6 • Drivers’ safety in the event of a collision has been enhanced by removing the shaft previous in the vehicle’s interior. Peace of Mind Mind & Safety proposals for total systems & Safety Comfort Driveshaft 4WD driveline system solutions • Optimal tire control is calculated instantaneously from the driver’s steering wheel operation and various vehicle information, thus providing passengers with a comfortable driving experience. • Enhances the degrees of freedom in the driving space (the steering wheel can be stored away during autonomous Comfort driving mode) Dierential unit TORSEN*4 Steering actuator *3 A mechanism that absorbs the difference between the right and left wheel rotation for smooth turning. *4 A type of LSD (Limited Slip Differential) that optimally distributes torque on Yutaka Seimitsu products the lateral or longitudinal axles when the vehicle is turning. ITCC*5 Became a JTEKT subsidiary in January 2020 *5 Intelligent Torque Controlled Coupling: A mechanism that detects the difference between front and rear wheel rotation and achieves optimal During normal driving During autonomous driving In January 2020, JTEKT acquired all front and rear wheel torque distribution by electronic control shares of Yutaka Seimitsu Kogyo, Ltd. *6 A shaft that transfers power from the engine to the rear axle in 4WD and *1 A mechanism that transmits the rotation of the steering wheel to the tire electronically rather than mechanically and made it a subsidiary. rear-wheel drive vehicles. COLUMN High Heat-Resistant Lithium-Ion Capacitor*2 Promoting further sales expansion of high heat-resistant lithium-ion capacitors A lithium-ion capacitor that can be used at a temperature range of -40˚C to 85˚C Based on a patented technology, high heat-resistant lithium-ion capacitors are “No. 1 & Only One” products that can operate in a range Please refer to COLUMN on page 28. of -40˚C to 85˚C. They oer improved system installation exibility as they can be installed in a vehicle without requiring a cooling device and excellent durability against deterioration caused by self-heat generation during large current charge/discharge, giving advantages in charge/discharge performance and durability over competitors’ products. • Installed in the system and used as a backup power supply Besides the automotive industry, we are receiving inquiries from customers that manufacture trains, construction machineries, If for some reason there is a disruption to electric power in the vehicle, this capacitor logistics facilities, and other equipment and are working aggressively to expand our sales channels. Peace of can supply power to the actuator that moves its tires. Going forward, JTEKT will spark new innovation with our No. 1 & Only One technologies Reaction torque Mind actuator and contribute to resolving an expanding array of social issues, such as global warming, & Safety declining birthrates, a shift to an elderly society, and disaster risks. Main power • Maintenance-free supply Backup power supply • Highly durable Factory equipment High heat-resistant lithium-ion capacitor automobile • Low loss Aircraft Buses and trucks EPS backup power unit Improved (Application: Backup, high-output) Electrication • Can be used for backup power supply, • High heat resistance allows it to be installed & power assist, energy recovery, and System within vehicles without cooling equipment Renewable energy Autonomous various other purposes Installation • High installation exibility 30-series module • Resilient to tough Driving Flexibility Medical equipment environments • Supports large current Trains Construction machinery *2 A power storage device with increased energy density by adding lithium ions to the negative electrode material of a power storage device (capacitor) having an electric double layer of a positive electrode and a negative electrode 27 28 Special Feature: Bearing Business SHAPING A BETTER FUTURE SHAPING A BETTER FUTURE JTEKT’s evolving solutions Bearing technologies required in the spread of vehicle electrification COLUMN Ultra-high precision bearing • Improved reliability: Respond to new issues that arise *4 from electrification PRECILENCE • Response to autonomous driving: Contribute to safe and reliable driving “Only One” technology “No. 1” technology • Response to high speed: Address needs for high-output and smaller motors Non-circulating type ball screw for Grease-lubricated high-speed ball electric brakes*2 bearing for EV motors • Torque reduction*1: Contribute to even better fuel efficiency Standard width Developed cage Grease retention Koyo Seiko Co., Ltd., one of the predecessors of JTEKT, will celebrate the 100th anniversary of its founding in 2021. In honor Non-circulating type ball screw of this milestone, we are working to elevate JTEKT’s Koyo brand of Developed item bearings to a global top brand. Toward that goal, we worked to We have simplied the ball screw mechanisms that eciently JTEKT developed a grease-lubricated ball bearing for EV motors deepen our base technologies (materials and heat treatment convert the rotational motion of an electric motor into linear that enables the world's fastest* high-speed rotation of all those technologies) and innovate our processing technologies. This led motion. This will contribute to the evolution of electric braking bearings for EV motors. This development addresses the need for to the successful development of PRECILENCE, a bearing that technology that is needed to meet the demands for size and smaller motors and higher motor output, which will help to oers ultimate rotational accuracy, quietness, high speed, low weight reduction and for autonomous driving technology. improve electric power eciency and extend the cruising range torque, and longevity that conventional bearings were not able to of the vehicle. achieve. We will continue contributing to the advancement of all * According to JTEKT research sorts of industries with our “No. 1 & Only One” technologies. *1 To reduce force to move objects (equivalent to low friction) *4 PRECILENCE is the brand name of an extra precision bearing that oers both *2 This is a kind of machine element comprising a screw shaft, a nut, balls, etc. with precision and silence. The brand will be developed as a series in the future. a mechanism for converting linear motion to rotational motion, and vice versa. *3 A phenomenon that the outer ring rotates in relation to the housing driving Resp mous onse tono to au hig “Only One” technology to h “No. 1” technology nse sp • Ball screw for electric brakes e *5 Ball bearing with suppressed po • High-speed rotation single ball bearing e (LFT series) 5th generation s (grease lubricated) d creep wear*3 Re • Hub unit for in-wheel motors Low-Friction-Torque tapered roller • Sensing hub unit bearing “LFT-V” Special coating Circumferential groove T y o it r l • High-speed rotation ball bearing (oil lubricated) • Ultra-lightweight q i hub unit b u a e i • Ball bearing for electric l superchargers r e • Hub unit with low-torque seal e r d As tapered roller bearings used in automotive transmissions and We have enhanced resistance to creep caused by the strain of the d • Corrosion-resistant bearing u dierential units*6, we have developed the LFT-V, which oers • Ball bearing for integrated c outer rings of thin section ball bearings used in electried e starter-generators the No. 1 lowest torque and weight in the LFT series. LFT-V will v • Low-torque ball bearing for high axial load t contribute to making automobiles lower in fuel consumption powertrain units. We are therefore able to contribute to making i transmissions smaller, lighter, and more reliable. o • Creep-resistant ball bearing o and higher in energy eciency. r • Low-torque grease for hub units n • Tapered roller bearing with outer ring oil sump p • High-speed ball bearing for hybrid vehicles • Lightweight and low-torque hub unit m • Low-friction torque tapered I • Long-life planetary shaft for needle roller bearing (LFT-V) *5 Low Friction Torque • Low-torque thrust needle roller bearing roller bearings *6 A mechanism that absorbs the dierence between • Improved hub unit seal • Low-friction torque tapered roller bearing (LFT-IV) the right and left wheel rotations for smooth turning. reliability • Low-friction torque tapered roller bearing (LFT-III) 2025 2020 2015 2010 2010 2015 2020 2025 29 * PRECILENCE is a registered trademark of JTEKT Corporation. 30 Special Feature: Machine Tools & Mechatronics Business SHAPING A BETTER FUTURE SHAPING A BETTER FUTURE JTEKT’s evolving solutions High accuracy cylindrical grinders*1 Gear skiving centers*4 Static technology STAT High-speed CBN processing C-X control technology Skiving tools Highly durable with High-speed and synchronized BEARING technology a high-speed spindle gear machining control A highly responsive servo system that Based on the Skiving Theory of Creation*5, STAT BEARING is installed in the We provide productivity improvement synchronizes the amount of movement our gear skiving centers achieve tool A compact, high-speed, and highly Our proprietary CNC achieves high- grinding wheel spindle, known as the to our customers through our rich in the grinding bed and work axis design with low-resistance and high durable unit created from a high- speed and highly accurate synchronized heart of the grinder, which has no experience in processing gained from rotation with high accuracy is achieved accuracy and a variety of tooth output, built-in motor and our in- rotation and gear tooth formation with metal-to-metal contact and is highly our development of grindstones that through a built-in CNC *2 device.