General and step-by-step testing and diagnosis of car steering control with hydraulic semi-integral booster

Laboratory stand is designed for laboratory courses in following subjects “Hydraulics, hydraulic drive, hydraulic and pneumatic automation”, “Designing of car hydraulic drives” etc. at secondary educational institutions and universities. 

Unlike NTC-15.39 this stand allows to carry out one additional laboratory work regarding general investigations of hydraulic booster (with simulation of resistance of controllable wheels to turning). 

Hydropanel and measuring and control panel are located on the stand framework, which is carried out as single-sided basis with a table. Elementary hydraulic diagram of the stand is located on measuring and control panel. Hydraulic facilities and instruments are installed on the table, on the hydropanel and on the lateral surface of the stand. Structural diagrams of investigated hydraulic booster facilities are located on the hydropanel. Facilities of hydraulic booster type MAZ-64229 are investigated on the stand (by agreement with customer other types of hydraulic boosters may be installed). 

Hydro station included to complete set is carried out as a separate module. The main facilities mounted on the stand and hydro station are: gear pump, three-phase asynchronous motor, pressure filter, discharge hydraulic valve (2 pcs.), controllable throttle, hydraulic cylinders (2 pcs.), steering device with hydraulic distributor, three-port flow control valve (flow valve and pressure valve), resistance of controllable wheels to turning simulator, hydraulic booster malfunction simulator. The stand has flexible configuration. Needed configuration of investigated subsystem is assembled with usage of elastic pipeworks with quick-release couplings (QRC). 

Information-measuring system of the stand allows to register pressures, flow rates, temperature, time. 

Five microprocessor pressure sensors, one manometer, two integrating flowmeters (velocity flowmeter and volume flowmeter), electronic stop-watch are installed on the stand. Pressure measurement results are displayed in digital mode. 

Software and methodical documentation supplemented to the stand: methodical and technical documentation set intended for academic staff.

Experiments provided

• Study of construction of hydraulic semi-integral booster (MAZ-64229)
• Investigation of gear pump operating characteristics.
• Investigation of three-port flow control valve.
• Investigation of characteristics of hydraulic booster distributor.
• Determination of hydraulic booster load characteristics.
• Diagnosis of operating conditions of hydraulic booster facilities.