Design and simulation of a steering gearbox with variable transmission ratio

2012 ◽  
Vol 226 (10) ◽  
pp. 2538-2548 ◽  
Author(s):  
Petre Alexandru ◽  
Dragoş Macaveiu ◽  
Cătălin Alexandru
Keyword(s):  
Steering System ◽  
Transmission Ratio ◽  
Geometrical Parameters ◽  
Electric Power Steering ◽  
Hydraulic Power ◽  
Power Steering ◽  
Variable Transmission ◽  
Involute Gears ◽  
Safe Control ◽  
Hydraulic Power Steering

This article presents the geometric and functional characteristics of a steering gearbox with variable transmission ratio, which contains a translating wheel (circular curved rack) in gearing with an eccentric sector (segment). The solution requires no special technology because it uses conventional involute gears, being obtained/derived from a classic gearbox with constant ratio by changing the gearing characteristics. The precision of the steering system and the reversibility of the gearing are not affected by these modifications, the driver having a good/safe control of the vehicle. This gearbox can be used for the steering systems of some low-power vehicles, assuring an increased actuating torque (less effort); in this way, the assistance (hydraulic power steering or electric power steering) can be avoided. The study is focused on the following objectives: formulating the theoretical bases, establishing the geometrical parameters, and simulating the functionality of the gearbox, based on the specific requirements of the vehicles’ steering system. Important conclusions have been drawn on the influence of some specific parameters in terms of insuring good gearing conditions, such as the variation of the distances between axes and the variation of the clearance between teeth.

scholarly journals An investigation on the energy-saving effect of a hybrid electric-power steering system for commercial vehicles

2018 ◽  
Vol 233 (6) ◽  
pp. 1623-1648 ◽  
Author(s):  
Ji In Park ◽  
Kawngki Jeon ◽  
Kyongsu Yi
Keyword(s):  
Electric Power ◽  
Steering System ◽  
Commercial Vehicles ◽  
Electric Power Steering ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Steering ◽  
Electric Power Steering System ◽  
Hybrid Electric ◽  
Hydraulic Power Steering

This article describes an investigation on the energy consumption of an alternative hybrid electric power steering system. The conventional hydraulic power steering system that is widely used in commercial vehicles can provide high steering-feel and reliability performances. However, since the combustion engine drives the pump, the hydraulic power steering system is energetically inefficient. To cope with this disadvantage of the hydraulic power steering system and to provide a technical base for the steering-related advanced driver assistance system, the Hybrid electric power steering system offers a solution for heavy commercial vehicles. The “Hybrid” of the title means that, for heavy commercial vehicles, the electric power steering system and electro-hydraulic power steering system are integrated in a ball-nut steering system. In this paper, to verify the energy-saving effect of the Hybrid electric power steering system, a dynamic model of the Hybrid electric power steering system was developed to estimate the energy consumption in the steering system. Furthermore, the fuel-efficiency test for the Hybrid electric power steering system were conducted while replacing the two steering systems (the conventional hydraulic power steering and Hybrid electric power steering system) in one vehicle on the chassis dynamometer for the proposed driving cycle. The driving cycle including the steering-angle profile has been developed to clearly investigate the effect on the energy-saving potential by the types of the steering system (hydraulic power steering and Hybrid electric power steering). The simulation results of the energy-consumption estimation showed that the hybrid electric power steering system can reduce the steering-system energy consumption by more than 50% under the proposed driving cycle. Also, the vehicle testing of the chassis dynamometer revealed that the Hybrid electric power steering system can improve the fuel efficiency of the vehicle by 1% for the specified driving cycle.

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.

Discussion Structure of Variable Displacement of Double Action Vane Pump

2011 ◽  
Vol 80-81 ◽  
pp. 616-620
Author(s):  
Lei Chen ◽  
Pan Zhang ◽  
Hai Yan Wang ◽  
Ji An
Keyword(s):  
Flow Model ◽  
Steering System ◽  
Vane Pump ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Power Steering ◽  
Variable Displacement ◽  
Flow Changes ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering

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 floating blocks that may move up and down in accordance with the rotational speed of the pump. The pump belongs to an automotive hydraulic power steering system, and prosperous utilization is expected. The theoretical flow model of the new pump was established and the pump flow changes under different speed were compared.

Modeling and Simulation Based on AMESim and Simulink Electric Hydraulic Power Steering System

2013 ◽  
Vol 706-708 ◽  
pp. 1150-1153
Author(s):  
Gui Hua Fang ◽  
Wen Shuai Zheng ◽  
Li Bo Zhang
Keyword(s):  
Steering System ◽  
Hydraulic Power ◽  
Power Steering System ◽  
Vehicle Handling ◽  
Power Steering ◽  
Simulation Based ◽  
Hydraulic Power Steering System ◽  
Hydraulic Power Steering ◽  
The Impact ◽  
Main Factor

This article using AMESim and Simulink software co-simulation technology and appropriate software to establish the simulation model of the key components of the steering system, it is found the factor which affect vehicle handling and stability of steering system in the structure by analyzing the impact of various parameters on the car steering system. It is to verify the feasibility of the model and study how steering system of all kinds of main factor to influence the vehicle steering stability through Simulink and AMESim software co-simulation results cf vehicle steering stability GB experiments.

Research on Design Methods and Experiments of the Electro-Hydraulic Power Steering Pump

2014 ◽  
Vol 986-987 ◽  
pp. 1125-1128 ◽  
Author(s):  
Yong Chen ◽  
Jing Jing Xia
Keyword(s):  
Design Method ◽  
Subsequent Development ◽  
Steering System ◽  
Hydraulic Power ◽  
Power Steering ◽  
Electronic Control System ◽  
Hydraulic Steering ◽  
Test Platform ◽  
Pump Test ◽  
Hydraulic Power Steering

In order to improve the performance of vehicle steering system and reduce the system energy consumption, the structure and operation principle of an electro-hydraulic power steering (EHPS) system with a electro-hydraulic steering pump are described, on this basis, with the function requirement of steering system, and by using vehicle design and fluid drive theory, the design method of this electro-hydraulic steering pump and its matching with the vehicle are presented. Through building electro-hydraulic steering pump test platform to test its performance parameters, the results prove the correctness and effectiveness of this kind of design method, provide the basis for subsequent development of the electronic control system.

Sign in / Sign up

Export Citation Format

Share Document