Application of ABS Regulator Solenoid Valve Control

In the air brake system of the vehicle, the electromagnetic valve of the brake regulator belongs to the anti-lock brake system. In case of an emergency, the wheel is prevented from being locked and slipped during braking, and the most suitable braking force is applied to each wheel, so that the adhesion force [1] of the tire to the ground is fully utilized, which plays a vital role in improving the safety of the vehicle. In ABS anti-lock system, the regulation of solenoid valve plays an important role. This paper analyzes and applies a kind of solenoid valve control.

Handling improvement of the M1 class vehicles by the way of hydraulic power steering adaptive characteristic optimization

In the paper, a work on handling improvement of the M1 class vehicle by means of optimization of the volume flow-pressure characteristic of the power steering pump with adaptive characteristic is described. A work on the simulation of the liquid flow through the electromagnetic valve of the power steering pump in initial and modified state is described. Results of bench testing of the optimized pump prototypes and subjective and objective road tests of the M1 vehicle with optimized prototype and initial one installed are presented.

Theoretical study of motor brake power with permanent throttle and electromagnetic valve

The article shows that in comparison with hydraulic and electric auxiliary braking systems, the engine brake has a simpler design, several times lower weight and cost. It can be installed in the exhaust pipe of almost any car, and its application gives a significant socio-economic effect. A mathematical model has been developed for the theoretical study of the power of motor brakes with a constant choke and with an electro-magnetic valve. A theoretical study of the ZMZ-406 engine with a motor brake with a constant choke and an electromagnetic valve has been carried out. The analysis of the research results showed that a motor brake with an electromagnetic valve provides a greater braking power of the internal combustion engine, and, consequently, a better vehicle braking efficiency. Keywords: research, car, engine brake, throttle, solenoid valve, power

Loss analysis of electromagnetic valve train under different service conditions

Electromagnetic valve train (EMVT) can realize independent, real-time and continuous valve motion regulation through the precise motion servo control, which has great potential to improve the efficiency of internal combustion engines. As an electromechanical integration device, EMVT is driven by electric energy, and the loss distribution is complex and changeable under different service conditions. Especially when the EMVT is used in exhaust system, the high gas pressure after combustion will increase the energy loss and operating temperature significantly. In order to improve the device performance, this study analyses the loss distribution and variation law of EMVT under different service conditions. First, the flux density is obtained by the 3D finite element simulation. In combination with the valve train dynamic Matlab/Simulink model, the copper loss and iron loss of EMVT under typical conditions are explored in detail. Then, the influence of the motion parameters (transition time) and condition parameters (gas pressure) on EMVT’s loss are calculated and analyzed significantly. In the end, the accuracy of the loss models and analysis results is verified by the experiment based on linear load simulator.

Analysis of the effectiveness and the possibility of creating an auxiliary braking system for an electronically controlled vehicle of the utility patent No. 153 247

The paper notes that electronic control of work processes in vehicle units and systems is one of the most effective and modern ways to improve their operational parameters. The means of elec-tronics make it possible to increase the average speed of vehicles, reduce fuel consumption, improve controllability, stability, passability and smoothness of driving, improve braking performance and safety, and facilitate driving. All modern vehicles electronic systems are digital, data transfer rate is up to 1 megabit per se-cond. This allows each sensor to be used for several systems. Dimensions of sensors are gradually decreasing; their speed, reliability, and accuracy are increasing. One perspective way to improve vehicles is the use of an internal combustion engine with electronic control of its braking torque as an auxiliary braking system. The analysis of the utility patent No. 153 247 “Auxiliary braking system of vehicle with elec-tronic control” is considered. Its analysis using the valve timing diagrams is made. The errors made in the description of the patent were revealed. The description of the intake and exhaust strokes does not take into account the increase in the cylinder volume by the manifold volume due to the opening of the respective valves and the fact that the pressure in the exhaust tract is limited by the preloading force of the engine exhaust brake springs. The electromagnetic valve must have operation speed of an order of magnitude greater than standard valves and the same capacity; its springs must have a large pre-pressure so that it does not open under the pressure in the receiver of the regular brake system. For fast pressure release, the electromagnetic valve must open a large flow cross-section as quickly as possible, overcoming the force of the high pressure acting on its disc in the cylinder (7.5 MPa) plus the force of pre-pressure of the valve springs. The formulas for determination of the valve throughput capacity are given. Their analysis showed that to ensure a given capacity of the valve by reducing its opening time it is necessary to proportionally increase the height of the rise of electro-magnetic valve or the average diameter that is not always possible. The carried out in the paper analysis showed that the efficiency of the proposed system is lower than the declared one, and its creation is impossible because there is no electromagnetic air valve satisfying the requirements for it in this design.

Development of improved performance electromagnetic valve for liquid rocket engine

The problem of developing optimal-design electromagnetic valves is relevant for many industries. The development of technology is characterized by increased power and pressures used for actuator mechanisms, as well as by reducing the dimensions and mass of automatic units. The goal of this article is to develop an advanced electromagnetic valve that would ensure optimal combination of high performance, reliability, technological effectiveness and minimal cost. On the basis of standard dependences for electromagnetic phenomena a mathematic model of a SU.1 valve was developed. It was calculated in several special-purpose software packages: NISA, FEMM, ANSYS Maxwell. Parametric analysis was implemented in ANSYS Maxwell for variable working gap settings and values of current force in the solenoid. As a result, the magnetic induction distribution field was obtained. The results of modeling the operation of the electromagnetic valve and the magnetic induction distribution field are presented for variable working gap settings and different values of current force in the solenoid. The model of an advanced electromagnetic valve for a liquid rocket engine was developed on the basis of the dependences obtained. The duration of single engine firing obtained is 40 msec. The results obtained make it possible to create a valve with hold-open time of 800msec, which is considered sufficient for application in electromagnetic direct current valves.