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Tecnología de frenado antibloqueo (ABS) de alto rendimiento para vehículos eléctricos

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TODE20160425001
Publicado:
16/05/2016
Caducidad:
16/05/2017
Resumen:
Un equipo de investigación de una universidad alemana ha desarrollado y probado un nuevo sistema integrado para control de tracción y frenado antibloqueo (ABS) en vehículos eléctricos, ofreciendo una seguridad activa y un mayor confort en la conducción del vehículo. El sistema se basa en un nuevo motor pero con la suspensión de ruedas tradicional. La universidad busca fabricantes de motores para vehículos eléctricos especializados en conversión de coches normales a eléctricos o híbridos con el fin de establecer acuerdos de cooperación técnica o licencia.

Details

Tittle:
High performance anti-lock-braking (ABS) technology for electric vehicles developed and demonstrated
Summary:
A German university research team has developed and demonstrated a novel integrated system for traction control and anti-lock-braking (ABS) in electric vehicles, enabling active safety and high driving comfort in e-cars. It is based on a new drive but with traditional wheel suspension. Looking for car suppliers like manufacturers of motors/drives for electric vehicles, retrofitting from conventional cars to e-cars or hybrid cars preferring technical co-operation and/or licence agreements.
Description:
All currently available solutions for anti-lock-braking (ABS) in electric vehicles do not integrate electric and friction brake systems so far. They just integrate these subsystems for the service brake applications. However for the ABS mode, the potential of the electric motors is not being used yet.
Compared to existing solutions in the area of traction control systems the developed approach combines jerk-free and wheel slip control functions in the traction mode. Due to the control of individual electric motors, installed on each wheel, the solution allows for both, a reduction of the acceleration time and the improvement of the ride quality.

The novel system relates to an integrated traction and brake torque control for electric vehicles with an individual wheel drive, in which each wheel is driven by an electric motor. The required torque on each wheel is calculated by the slip controller in accordance with the total torque demand produced by the driver, the estimated target slip for each wheel and the mode of the vehicle motion. During the traction mode, individual wheel torques are solely controlled by the driving motors. During the braking mode, individual wheel torques are controlled both by the driving motors, operating as the generators, and the friction brakes.

The novel solution has a common structure for the traction control and the ABS functions, and consists of feedforward (predictive) and feedback (reactive) contributions. For the ABS function the system splits the contribution for each vehicle corner into the torque shares to be generated by the electric motor and the friction brake.

The method and the control device has successfully been validated on the real vehicle demonstrator (see fig.) under the following technical conditions:
- Switched-reluctance on-board motors
- Decoupled electro-hydraulic brake system
- Sport utility vehicle (SUV)
Advantages and Innovations:
- Compared to existing solutions the energy recuperation is improved significantly by the use of electric motors in the ABS mode
- 20 % reduction of the stopping distance at braking by direct wheel slip control with electric motors
- Accurate and smooth wheel slip ratio tracking performance due to quicker response and wider bandwidth of electric motors compared to conventional hydraulic systems
- Special benefits for active safety and driving comfort
- Energy regeneration in ABS mode by application of the proposed brake blending strategy
- Excellent off-road capability - the system guarantees a high performance under transient and rough road surface conditions
Stage of Development:
Available for demonstration
IPs:
Patents granted
CommeR Statunts Regarding IPR Status:
The relevant patent has been granted on 23/09/2015.

Partner sought

Type and Role of Partner Sought:
1) Type/Field of activity: Applied research centers, SMEs, large industry
- Applied research centers dealing with vehicle active safety systems, control of chassis and powertrains
- Industry dealing with the development of electric powertrains and brake-by-wire systems

2) Role of partner per selected cooperation type:
For Licence agreements:
Automotive suppliers dealing with the development of electric powertrains and brake-by-wire systems; the approach in the patent is useful in integration of these subsystems providing better active vehicle safety and ride quality though involved anti-jerk, blending and wheel slip control functions.

For Technical cooperation agreements:
The partner should be involved in integration, control and/or development of powertrains and brake-by-wire systems for electric vehicles.

Client

Type and Size of Client:
University
Already Engaged in Trans-National Cooperation:
Si
Languages Spoken:
English
German

Keywords

Technology Keywords:
02009018 Dispositivos de medida
02009025 Sistemas de frenado
02009006 Traction/Propulsion Systems