scholarly journals 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

2021 ◽  
Vol 1 (1) ◽  
pp. 64-72
Author(s):  
Al-Jumaili Abdulsatar KH Shihan ◽  
◽  
V.V. Serebryakov ◽  
Keyword(s):  
Combustion Engine ◽  
Average Diameter ◽  
Throughput Capacity ◽  
Digital Data ◽  
Electronic Control ◽  
Operational Parameters ◽  
Electromagnetic Valve ◽  
Braking System ◽  
Operation Speed ◽  
Utility Patent

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.

Research on Variable Cylinders of the Tandem 4-Cylinder Gasoline Engine for Fuel Economy

2008 ◽  
Vol 20 (1) ◽  
pp. 75-81 ◽  
Author(s):  
Kouki Yamaji ◽  
◽  
Hirokazu Suzuki ◽  
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Gasoline Engine ◽  
Combustion Engine ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Engine Fuel ◽  
Electronic Control ◽  
The Difference ◽  
Predetermined Time

With progress in internal combustion engine fuel economy, variable cylinder systems have attracted attention. We measured fuel consumption in cylinder cutoff by stopping the injector alone, collected data changing the location and number of cutoff cylinders and when varying the cutoff cylinder, and compared the difference in fuel cost reduction. A transistor is inserted serially into the injector control circuit of the electronic control unit (ECU). By controlling the transistor via microcomputer, the injector is turned on or off independently from ECU control in obtain cylinder cutoff. The amount of fuel consumption is measured using enhancement mode of a failure diagnostic device based on the OBD II standard to collect injection time and rotational speed of the injector for a predetermined time and calculated based on this data. We confirmed that by stopping the injector alone, fuel consumption was reduced 6 to 22% and is reduced when the cutoff cylinder is varied.

scholarly journals Study on a segmented electro-pneumatic braking system for heavy-haul trains

2020 ◽  
Vol 2 (3) ◽  
pp. 216-225
Author(s):  
Wei Wei ◽  
Yong Jiang ◽  
Yuan Zhang ◽  
Xubao Zhao ◽  
Jun Zhang
Keyword(s):  
Longitudinal Impact ◽  
Electronic Control ◽  
Railway Network ◽  
Braking System ◽  
Heavy Haul Train ◽  
Heavy Haul ◽  
New Type ◽  
Control Devices ◽  
Heavy Haul Trains ◽  
Main Factor

Abstract The large longitudinal impact of heavy-haul trains is the main factor limiting their development, and the asynchronous nature of train-braking systems is the main cause of this longitudinal impact. In this paper, a segmented electro-pneumatic braking solution fully compatible with the existing freight-train braking system in China is proposed to improve the synchrony of train-braking systems. A simulation model for this braking system is developed based on air-flow theory, the 120 distribution valve and electronic control devices. The braking characteristics obtained from simulations are compared to those from the train-brake testing platform, and show high fidelity. On this basis, the effects of the new braking system on the braking capacity and longitudinal impact of a 20 000 t heavy-haul train are analysed by further simulation. The results show that during service brakes, the segmented electro-pneumatic braking system can increase the braking capacity by 4.2–24.7% and reduce the coupler force by 21.6–68.0%. Therefore, it can be seen that the segmented electro-pneumatic braking system is a new type of electro-pneumatic brake that meets the needs of the Chinese railway network. It solves the problem of the longitudinal impact of heavy-haul trains satisfactorily, and its compatibility with the existing braking system (resulting in a reduced modification workload) makes it possible to maintain normal operations on heavy-haul lines while trains undergo modification.

Assessment of socio-economic efficiency of application of the new ice braking system on modern cars

2021 ◽  
Keyword(s):  
Internal Combustion Engine ◽  
Economic Efficiency ◽  
Combustion Engine ◽  
Electronic System ◽  
Internal Combustion ◽  
Braking System ◽  
High Resource ◽  
Vehicle Engine ◽  
Socio Economic Impact ◽  
Resource Economy

The article is devoted to assessing the socio-economic efficiency of internal combustion engine equipment with an electronic system for regulating its mechanical losses, which provides effective vehicle braking. The evaluation of the socio-economic efficiency of the proposed equipment for the internal combustion engine of cars-taxis with an electronic system for managing mechanical losses, which provides effective braking of the car, showed that this improvement provides a high resource economy for Russia, amounting to about 3.5 % of the revenue of the taxi market in the Russian Federation. Keywords rating, car, socio-economic impact, the deceleration of the vehicle engine

DEVELOPMENT OF AN ELECTRONIC CONTROL SYSTEM FOR GAS-ENGINES WITH SPARK IGNITION, CONVERTED ON THE BASIS OF DIESEL ENGINES TO WORK FOR ON LIQUEFIED PETROLEUM GAS

2018 ◽  
pp. 12-18 ◽  
Author(s):  
Serhii Kovalov
Keyword(s):  
Control System ◽  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Spark Ignition ◽  
Combustion Engines ◽  
Electronic Control ◽  
Liquefied Petroleum Gas ◽  
Electronic Control System

The expediency and advantages of using gas motor fuels, in particular, liquefied petroleum gas with respect to traditional liquid motor fuels, are shown. Technical solutions for the use of liquefied petroleum gas by diesel engines are presented and analysed. The expediency and advantages of converting diesel engines to gas spark ignition internal combustion engines with respect to conversion to gas diesel engines. Developed by the Ukrainian synthesis technology Avenir Gaz has for converting diesel engines to gas internal combustion engines with spark ignition. According to the synthesis technology of Avenir Gaz, re-equipment of diesel engines of vehicles is carried out on the basis of the universal electronic control system for gas internal combustion engines, which is based on the multifunctional electronic microprocessor control unit Avenir Gaz 37. The developed electronic microprocessor control system for gas internal combustion engines with forced ignition has a modular structure and consists of two main and a number of additional subsystems. A schematic diagram of a universal electronic control system of a gas internal combustion engine with spark ignition for operation on liquefied petroleum gas is presented. The principle of operation of the main subsystems, which include the subsystem of power management and injection of liquefied petroleum gas by gas electromagnetic injectors into the intake manifold of a gas engine, and the principle of operation of the control subsystem of the ignition with two-spark ignition coils are described. A multifunctional electronic control unit Avenir Gaz 37 has been designed and manufactured. Non-motorized tests of the electronic control unit confirmed its performance. Based on the synthesis technology of Avenir Gaz using the universal electronic control system for gas internal combustion engines with the Avenir Gaz 37 ECU, the D-240 diesel engine was converted into a gas spark ignition internal combustion engine of the D-240-LPG model. Keywords: gas internal combustion engine with forced ignition, liquefied petroleum gas (LPG), electronic microprocessor control system for gas internal combustion engines, vehicles operating on LPG.

The problem of developing a control system for the oxygen sensor heater of an internal combustion engine of a modern vehicle

2021 ◽  
pp. 05-08
Author(s):  
Keyword(s):  
Control System ◽  
Internal Combustion Engine ◽  
Oxygen Sensor ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Electronic Control ◽  
Electronic Control System

In the presented work, the problem of developing an electronic control system for the oxygen sensor heater of an automobile internal combustion engine is actualized. Keywords electronic control system, automobile, internal combustion engine

scholarly journals Emergency Braking of a Mine Hoist in the Context of the Braking System Selection

2017 ◽  
Vol 62 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Stanisław Wolny
Keyword(s):  
Dynamic Behaviour ◽  
List Type ◽  
Operational Parameters ◽  
Emergency Braking ◽  
Braking System ◽  
Analytical Formulas ◽  
Braking Phase ◽  
System Selection ◽  
Mine Hoist ◽  
Fatigue Endurance

Abstract The paper addresses the selected aspects of the dynamic behaviour of mine hoists during the emergency braking phase. Basing on the model of the hoist and supported by theoretical backgrounds provided by the author (Wolny, 2016), analytical formulas are derived to determine the parameters of the braking system such that during an emergency braking it should guarantee that: –the maximal loading of the hoisting ropes should not exceed the rope breaking force, –deceleration of the conveyances being stopped should not exceed the admissible levels Results of the dynamic analysis of the mine hoist behaviour during an emergency braking phase summarised in this study can be utilised to support the design of conveyance and rope attachments by the fatigue endurance methods, with an aim to adapt it to the specified operational parameters of the hoisting installation (Eurokod 3).

INTERFACE ENGINEERING IN RESISTIVE SWITCHING MEMORIES

2011 ◽  
Vol 01 (02) ◽  
pp. 141-162 ◽  
Author(s):  
SHENG-YU WANG ◽  
TSEUNG-YUEN TSENG
Keyword(s):  
Resistive Switching ◽  
Memory Performance ◽  
Random Access ◽  
Metal Electrode ◽  
Interface Layer ◽  
Digital Data ◽  
Interface Engineering ◽  
Device Structure ◽  
Ongoing Research ◽  
Operation Speed

Electric-induced resistive switching effects have attracted wide attention for future nonvolatile memory applications known as resistive random access memory (RRAM). RRAM is one of the promising candidates because of its excellent properties including simple device structure, high operation speed, low power consumption and high density integration. The RRAM devices primarily utilize different resistance values to store the digital data and can keep the resistance state without any power. Recent advances in the understanding of the resistive switching mechanism are described by a thermal or electrochemical redox reaction near the interface between the oxide and the active metal electrode. This paper reviews the ongoing research and development activities on the interface engineering of the RRAM devices. The possible switching mechanisms for the bistable resistive switching are described. The effects of formation, composition and thickness of the interface layer on the resistive switching characteristics and consequently the memory performance are also discussed.

scholarly journals Research on the designing of pneumatic positioning units controlled with valves commanded in modulated pulses

2019 ◽  
Vol 290 ◽  
pp. 08003
Author(s):  
Mihai Avram ◽  
Victor Constantin ◽  
Emil-Ionuț Niță
Keyword(s):  
Closed Loop ◽  
Low Cost ◽  
Positioning System ◽  
Electronic Control ◽  
Mechatronic System ◽  
Positioning Accuracy ◽  
Braking System ◽  
Electronic Control System ◽  
New Type ◽  
Specific Construction

This article presents the hardware structure for a new type of closed loop positioning system using pneumatic energy. In brief, when the mobile subassembly of the system is about to reach a targeted position its speed is controlled by the small-sized pneumatic electro valves, which are commanded in modulated pulses. Here, we developed an electronic control system of which memory has a specially designed algorithm. In addition, the pneumatic engine has a specific construction that integrates a transducer of position as well as a braking system. The proposed mechatronic system is described by good positioning accuracy and low cost.

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