Automotive Power Steering ‘Feel’

1981 ◽  
Vol 195 (1) ◽  
pp. 29-36 ◽  
Author(s):  
F J Adams
Keyword(s):  
High Speed ◽  
Rotary Valve ◽  
General Sense ◽  
Power Steering ◽  
Steering Feel ◽  
Driving Conditions ◽  
Torsion Bar

This paper discusses what is meant by ‘feel’, particularly but not exclusively under high speed driving conditions, what is required to provide a satisfactory ‘feel’, and to discuss how it may be possible to do this. It mainly, but not exclusively, considers motor cars and is basically confined to the modern power steering rotary valve which uses torsion bar springing, since this embraces by far the greatest number of power gears currently made. Most of the illustrations and references relate to rack and pinion steering but, in a general sense, all that is said can be applied to other types of steering gear.

Fault Tolerant Control of EPS System with Sensor Fault

2019 ◽  
Vol 28 (07) ◽  
pp. 1950116
Author(s):  
Manel Allous ◽  
Kais Mrabet ◽  
Nadia Zanzouri
Keyword(s):  
Control Strategy ◽  
System Performance ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Torque Sensor ◽  
Sensor Fault ◽  
Electric Power Steering ◽  
Luenberger Observer ◽  
Power Steering ◽  
Torsion Bar

Taking into account the sensors faults, modeling of electric power steering (EPS) behavior improves steering reliability. Such task becomes difficult considering the nonlinearity of EPS systems. Therefore, in order to ensure the good behavior stability of the EPS, it is important to validate such established models on a real system. Hence, a fault tolerant control (FTC) design is herein proposed by considering an occurring fault at the torsion bar. A Luenberger observer is used to estimate the torque sensor fault. The FTC is performed to compensate this sensor fault by using the inverse bond graph (BG) modeling. Our simulations reveal the importance of proposed control strategy to improve the EPS system performance but also to reduce the system complexity.

Simulation on Displacement Characteristics of Variable Displacement of Double-Action Vane Pump

2010 ◽  
Vol 152-153 ◽  
pp. 1088-1091
Author(s):  
Lei Chen ◽  
Pan Zhang
Keyword(s):  
Simulation Model ◽  
High Speed ◽  
Steering System ◽  
Vane Pump ◽  
Hydraulic Power ◽  
Power Steering ◽  
Simulink Simulation ◽  
Variable Displacement ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

On of the practical difficulties of high speed automotive hydraulic power steering is that the output exceeds the actual demands of the system, i.e., there is a substantial power loss. This paper discusses the configuration and the action principle of a new variable displacement of double-action vane pump, which consists of floating blocks. The pump belongs to an automotive hydraulic power steering system, and prosperous utilization is expected. In the meantime the mathematical and simulation model for hydraulic power steering of automobile were established and the Matlab Simulink simulation model was presented. Different parameters of pump are selected in simulating programming. The simulating results are analyzed and compared.

Design of Traditional Hydraulic Steering System with Variable Power

2014 ◽  
Vol 644-650 ◽  
pp. 755-758
Author(s):  
Jie Li ◽  
Jian Tong Song ◽  
Li Hong Wang ◽  
Jv Biao Yao
Keyword(s):  
High Speed ◽  
Steering System ◽  
Vehicle Speed ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Characteristics ◽  
Power Steering ◽  
Hydraulic Steering ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

Conventional hydraulic steering system has the problems of "low-speed heavy, high-speed flight" and energy-wasting when steering, the main reason is after the system is designed, the power characteristics are fixed. To solve this problem it is necessary to achieve the power characteristics of changing power steering system according to speed of vehicles, in order to offer the power that matches the speed. Using vehicle speed sensor signal to control pilot solenoid unloading valve to regulate the pressure of hydraulic system, can achieve the regulation of power characteristics, this article is based on such idea to design variable hydraulic power steering system for hydraulic power steering system of light trucks.

Combustion in a high-speed rotary valve spark-ignition engine

2007 ◽  
Vol 221 (8) ◽  
pp. 971-990 ◽  
Author(s):  
P H P Chow ◽  
H C Watson ◽  
T Wallis
Keyword(s):  
High Speed ◽  
Combustion Process ◽  
Spark Ignition Engine ◽  
Combustion Model ◽  
Rotary Valve ◽  
Combustion Simulation ◽  
Parametric Effects ◽  
Sensitivity Studies ◽  
Valve Engine ◽  
Data Sensitivity

The current paper describes a study of combustion in the Bishop rotary valve engine by means of computation simulations. The combustion model was developed for this research at speeds up to 18 000 r/min and the results from the simulation were compared with experimental data. Sensitivity studies were performed in order to investigate the parametric effects on the combustion simulation of the engine. The major finding of this study was that convection of the flame kernels occurs and has a strong influence on the performance of the engine. The results indicated some insights as to how the combustion process of the engine can be improved.

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