TOP PAGE
ENGLISH
JAPANESE
|
CONNECT WITH US:
Home
About
Services
Contact
Log in
*
Home
Press release
Oct 20, 2022 18:35 JST
Source:
Hitachi, Ltd.
Hitachi: Development of an Anti-Jerk Control to Improve Ride Comfort of Electrified Vehicles and Prototype of motor torque control to improve power consumption and stability of electrified vehicles
TOKYO, Oct 20, 2022 - (JCN Newswire) - Hitachi Astemo, Ltd. has developed a prototype of an anti-jerk control that improves ride comfort by reducing the back-and-forth jerk* that occurs when the vehicle stops, and a motor torque control (motor ABS (anti-lock braking system)) that improves electricity consumption, driving stability and a sense of security by maintaining appropriate wheel slippage during regenerative braking on slippery surfaces.
Change of motor torque and vehicle velocity with anti-jerk during accelerator release
* Rate of change of acceleration. When a vehicle is brought to a stop, a vigorous acceleration with vibration and shaking tends to occur, which is called jerk
In automobile operation, during deceleration when bringing a vehicle to a stop, braking force must be controlled by loosening or strengthening the brakes appropriately according to the speed, or else jerks will occur, resulting in shaking that impairs ride comfort. To solve this issue, Hitachi Astemo developed a prototype that leverages the features of electrified vehicles.
Unlike the torque of an internal combustion engine, which is powered by fuel combustion, the torque of an electric motor is highly responsive to the driver's operation and can be increased quickly when accelerating or decelerating. Electric vehicles are also equipped with a mechanism called regenerative braking, which converts the torque into electric energy when the accelerator pedal is released. It quickly reduces the motor's rotation with torque and it generates electricity while uses torque for the braking force.
Hitachi Astemo has developed an anti-jerk control system that takes advantage of the motor's torque characteristics and the braking power of regenerative braking. The system will suppress jerks by appropriately controlling the amount of torque to optimize the motor's braking power when the accelerator pedal is released. With this control, even ordinary drivers can easily achieve smooth stops with little jolting achieving the same results as those of a skilled driver.
When driving on icy and slippery road surfaces, the regenerative braking alone could cause the tires to slip, which in turn reduces steering and driving stability. One way to avoid this issue is to stop the regenerative brake operation, which can suppress tire slippage, but this will reduce the amount of regenerated electric energy, which will worsen electricity consumption.
Hitachi Astemo has developed a motor torque control technology that does not stop the regenerative brake itself, but controls the torque of the drive motor according to the driving conditions of the vehicle. The technology enables the vehicle to continue regenerating electricity even during deceleration when the accelerator pedal is turned off, while controlling tire slip and stabilizing the driving condition. This enables both regeneration of electricity and a sense of security due to improved driving stability during deceleration.
The two newly developed technologies will contribute to OEM's electric vehicle development combining high driving performance with environmental performance, and thereby contribute to the popularization of electrified vehicles.
Hitachi Astemo is committed to strengthening its business and delivering technological innovation through a strategic business portfolio, which consists of the Powertrain & Safety Systems business, Chassis business, Motorcycle business, Software business and Aftermarket business. Aiming for a better environment globally and growth around the pillars of "green," "digital," and "innovation," we will deliver highly efficient internal combustion engine systems; electric systems that reduce emissions; autonomous driving for improved safety and comfort; advanced driver assistance systems; and advanced chassis systems. Through such advanced mobility solutions, we will contribute to realizing a sustainable society and provide enhanced corporate value for our customers.
For more information, please visit the Hitachi Astemo website: www.hitachiastemo.com/en/.
Source: Hitachi, Ltd.
Sectors: Automotive, EVs, Transportation
Copyright ©2025 JCN Newswire. All rights reserved. A division of Japan Corporate News Network.
Related Press Release
Hitachi Industrial Equipment Systems Launches Next-Generation Inverter System to Support Stable, Resilient Power Grids
April 18 2025 15:46 JST
Kirin and Hitachi begin joint research on the creation of forest-based carbon credits
April 04 2025 14:56 JST
Hitachi's New Corporate Vision: Changing the World and Future with the Power of Knowledge
April 01 2025 17:46 JST
Hitachi: Strengthening Our Analytical Business to Solve Social Issues with Our Core Technologies
April 01 2025 17:38 JST
Hitachi: Completion of New Production Facility for Semiconductor Manufacturing Equipment in Kasado Area
April 01 2025 16:52 JST
Hitachi to Install a New Digital Maturity Assessment Method to Accelerate DX in Global Manufacturing Operations
March 26 2025 16:13 JST
Hitachi launches new brand design to advance era of sustainable global growth
March 20 2025 12:49 JST
Hitachi Energy invests additional $250 million USD to address global transformer shortage
March 11 2025 16:49 JST
Hitachi establishes its fourth Corporate Venture Capital Fund to capture technology turning points and future growth opportunities
February 06 2025 15:32 JST
Hitachi Launches Food Quality Visualization Solution with Time-Temperature Sensing Ink
January 24 2025 11:40 JST
More Press release >>
Latest Press Release
DENSO Acquires Axia Vegetable Seeds to Realize Sustainable Agriculture
Jul 04, 2025 16:20 JST
MHIET Launches 450kW Gas Cogeneration System Capable of Hydrogen Co-Firing
Jul 04, 2025 15:13 JST
Yachiyo Engineering and NEC launch adaptation finance study in Indonesia to calculate the adaptation value of disaster prevention measures
Jul 04, 2025 13:25 JST
Fujitsu to implement store monitoring solution for METRO Inc. in Canada, enhancing operational efficiency and policy compliance
Jul 04, 2025 13:19 JST
Fujitsu to develop ETF trading platform based on TSE's CONNEQTOR and provide it to Australian Securities Exchange
Jul 03, 2025 11:14 JST
Mitsubishi Motors Launches the All-New Grandis for the European Market
Jul 02, 2025 12:10 JST
Valuufy partners with Mainichi Future Creation Lab, Supporting New Approaches to Business Sustainability
Jul 02, 2025 12:00 JST
Fujitsu launches solution to enhance customers' global supply chain resilience
Jul 02, 2025 11:32 JST
MHI Receives Order to Supply Four Circulating Water Pumps for Units 5 and 6 of Sanmen Nuclear Power Plant in China Under Collaboration with Dongfang Electric Machinery
Jul 02, 2025 11:30 JST
Multi-purpose Arena in Odaiba Aomi Area TOYOTA ARENA TOKYO Construction Completed
Jul 01, 2025 22:56 JST
1Finity, a Fujitsu company, commences operations and reveals brand identity
Jul 01, 2025 22:53 JST
MHI Thermal Systems Begins Field Test of Jointly Developed "Surplus Renewable Energy Absorption and Release System"
Jul 01, 2025 22:40 JST
Japan's Telecommunications Carriers Strengthen Disaster Response Through Collaborative Information Sharing
Jul 01, 2025 22:30 JST
JCB and Mandai Wildlife Group Deepen Partnership with exclusive discounts for JCB cardmembers
Jul 01, 2025 16:00 JST
Fujitsu provides Japan's first AI-powered cloud-based library search service
Jul 01, 2025 11:30 JST
JCB Brings Apple Pay to Cardmembers in Vietnam
Jul 01, 2025 11:15 JST
First Shipment of LNG from the LNG Canada Project
Jul 01, 2025 11:00 JST
Approval in Principle (AiP) for World's First LCO2 / Methanol Carrier
Jun 30, 2025 20:30 JST
Acropolis Rally Greece: Day 4 Sunday success and second overall for TOYOTA GAZOO Racing's Ogier
Jun 30, 2025 20:15 JST
Mitsubishi Fuso-Hino Merger: 4 Firms Collaborate for the Future of Commercial Vehicles
Jun 30, 2025 20:10 JST
More Latest Release >>