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Integrated Control System Between Active Control Suspension and Four Wheel Steering for the 1989 CELICA
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Abstract
We adopted the active hydropneumatic suspension and the dual-mode 4WS system for the 1989 Toyota CELICA. The active control suspension system detects the vehicle state with various sensors to control the oil pressure in the hydraulic cylinder with the linear pressure control valve; controlling attitude, ride comfort, stability & controllability and three-level vehicle height. The 4WS system continuously changes the steering angle ratio between the front and rear wheel according to the vehicle speed, decreasing the minimum turning radius at a low speed by 0.5 m and improving the controllability at a medium speed and the stability at a high speed. In addition, we further improved the performance of each system by integrally controlling the active control suspension system and the 4WS system. Thus, we succeeded in improving the total performance of vehicle dynamics by adding ABS to these systems to control the vertical, lateral and longitudinal accelerations.
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Yokoya, Y., Kizu, R., Kawaguchi, H., Ohashi, K. et al., "Integrated Control System Between Active Control Suspension and Four Wheel Steering for the 1989 CELICA," SAE Technical Paper 901748, 1990, https://doi.org/10.4271/901748.Also In
Electronic and Non-Electronic Suspension Systems and Steering Controls
Number: SP-0838; Published: 1990-09-01
Number: SP-0838; Published: 1990-09-01
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