G1000-1-3 Research on Skid Control of Small Electric Vehicle with Hydraulic-Mechanical Hybrid Brake System : 3rd Report:Researches of influence of Disturbance on Loci and Effect of ABS

Within the field of electric vehicles, the cooperative control of a dual electro-hydraulic regenerative brake system using the foot brake pedal as the sole input of driver brake requests is a challenging control problem, especially when the electro-hydraulic brake system features on/off solenoid valves which are widely used in the automotive industry. This type of hydraulic actuator is hard to use to perform a fine brake pressure regulation. Thus, this paper focuses on the implementation of a novel controller design for a dual electro-hydraulic regenerative brake system featuring on/off solenoid valves which track an “ideal” brake force distribution. As an improvement to a standard brake force distribution, it can provide the reach of the maximum braking adherence and can improve the energy recovery of a rear-wheel-drive electric vehicle. This improvement in energy recovery is possible with the complete substitution of the rear hydraulic brake force with a regenerative brake force until the reach of the electric powertrain constraints. It is done by performing a proper brake pressure fine regulation through the proposed variable structure control of the on/off solenoid valves provided by the hydraulic platform of the vehicle stability system. Through road tests, the tracking feasibility of the proposed brake force distribution with the mechatronic system developed is validated.

Download Full-text

G1000-1-2 Research on Skid Control of Small Electric Vehicle with Hydraulic-Mechanical Hybrid Brake System : Simulation of Braking Force by Four Wheel Hydraulic Model

The proceedings of the JSME annual meeting ◽

10.1299/jsmemecjo.2010.5.0_165 ◽

2010 ◽

Vol 2010.5 (0) ◽

pp. 165-166

Author(s):

Seiya KOBAYASHI ◽

Hirohiko OGINO

Keyword(s):

Electric Vehicle ◽

System Simulation ◽

Hydraulic Model ◽

Brake System ◽

Braking Force

Download Full-text

Analysis of Effect on Change Rate of Wheel Cylinder Pressure for Electro-Hydraulic Brake System of Electric Vehicle

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.209-211.2094 ◽

2012 ◽

Vol 209-211 ◽

pp. 2094-2099

Author(s):

Xiu Yuan Xing ◽

Ze Chang Sun ◽

Meng Wang

Keyword(s):

Electric Vehicle ◽

Pressure Change ◽

Brake System ◽

Impact Factors ◽

Cylinder Pressure ◽

Change Rate ◽

Hydraulic Brake ◽

Brake Pressure ◽

New Type ◽

The Impact

Based on a new type of electro-hydraulic brake system of electric vehicle, the operating principle was studied. A model of hydraulic brake system and corresponding control strategy were built with the co-simulation platform of AMESim and MATLAB. The impact factors of brake pressure change rate were analyzed theoretically. The influences of the main hydraulic parameters were analyzed through simulation, such as volume of brake fluid, type of pipe, ABS valve and brake clearance. The results provide a theoretical basis for the accurate control of wheel cylinder pressure.

Download Full-text