Automotive Thermostat Valve Configurations: Enhanced Warm-Up Performance

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
T. Mitchell ◽  
M. Salah ◽  
J. Wagner ◽  
D. Dawson
Keyword(s):  
Cooling System ◽  
Combustion Engine ◽  
Experimental Testing ◽  
Engine Performance ◽  
Coolant Temperature ◽  
Warm Up ◽  
Engine Cooling ◽  
Temperature Tracking ◽  
Smart Thermostat ◽  
Electric Radiator

The automotive cooling system has unrealized potential to improve internal combustion engine performance through enhanced coolant temperature control and reduced parasitic losses. Advanced automotive thermal management systems use controllable actuators (e.g., smart thermostat valve, variable speed water pump, and electric radiator fan) that must work in harmony to control engine temperature. One important area of cooling system operation is warm-up, during which fluid flow is regulated between the bypass and radiator loops. A fundamental question arises regarding the usefulness of the common thermostat valve. In this paper, four different thermostat configurations were analyzed, with accompanying linear and nonlinear control algorithms, to investigate warm-up behaviors and thermostat valve operations. The configurations considered include factory, two-way valve, three-way valve, and no valve. Representative experimental testing was conducted on a steam-based thermal bench to examine the effectiveness of each valve configuration in the engine cooling system. The results clearly demonstrate that the three-way valve has the best performance as noted by the excellent warm-up time, temperature tracking, and cooling system power consumption.

scholarly journals Development and Research of the Adaptive Cooling System with an Electric Pump

2021 ◽  
Vol 39 (2) ◽  
pp. 638-642
Author(s):  
Ermakov Andrey ◽  
Salakhov Rishat ◽  
Khismatullin Renat ◽  
Idiatullin Bulat
Keyword(s):  
Energy Savings ◽  
Cooling System ◽  
Combustion Engine ◽  
High Energy ◽  
Coolant Temperature ◽  
Pump Speed ◽  
Operating Modes ◽  
Engine Cooling ◽  
Low Load ◽  
Dimensional Simulation

This paper studies the effect of the electrically-driven pump on improving the efficiency of internal combustion engine cooling systems. Numerical one-dimensional simulation of the system operation was performed according to the European transient cycle (ETC). The paper compares the cooling system with a belt-driven pump and electrically-driven pump. It was found that the electrically-driven cooling system not only could maintain a more stable coolant temperature, and also provided energy savings for the pump drive. It can be noted that the mechanically-driven cooling system has disproportionately high energy costs, unstable coolant temperature, so in case of sudden changes in operating modes, the built-in thermostat cannot keep it within two degrees Celsius. At high engine speeds and low load, the drive consumes too much power, and when thermostat is faulty and the coolant is overcooled, at low speeds and high load, the coolant is overheating. The paper also considers options with electric-driven pump with and without an enabled thermostat. With a working thermostat and electrically driven pump, the system consumes a little more energy, because the thermostat does not open fully and as a result, the pump speed is 8.2% higher than in a cooling system without a thermostat.

Active Shutters of the Internal Combustion Engine Cooling System of a Passenger Car

2019 ◽  
pp. 44-51 ◽  
Author(s):  
A.P. Petrov ◽  
S.N. Bannikov
Keyword(s):  
High Efficiency ◽  
Aerodynamic Drag ◽  
Cooling System ◽  
Combustion Engine ◽  
Air Conditioning System ◽  
Warm Up ◽  
Engine Cooling ◽  
Air Supply ◽  
Reduce Emissions ◽  
Cooling Air

The practice of using active shutters in the modern automotive industry is analyzed in this work, and the high efficiency of such systems is emphasized. It is also noted that by using active shutters the aerodynamic drag of the car can be reduced by 6–10 %. The reduction in the engine’s warm-up time provides faster heating of the car interior. All this helps to save fuel and reduce emissions of harmful substances into the atmosphere. The possibility of utilizing the radiator’s active shutters with two autonomously controlled sections is considered. CFD numerical modelling is used to conduct the research, and the potential of the proposed active shutters design is determined. The research has shown that besides the high efficiency, the proposed shutters system has a simpler design and reliability associated with several factors. Due to the vertical arrangement of the slats, the shutters do not reduce the efficiency of the engine’s cooling system and the air conditioning system in the passenger compartment. Unlike in the existing designs, in the proposed system the cooling air supply is regulated by separate opening or closing of two independent sections.

scholarly journals Thermal Characteristics Investigation of the Internal Combustion Engine Cooling-Combustion System Using Thermal Boundary Dynamic Coupling Method and Experimental Verification

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2127 ◽  
Author(s):  
Junhong Zhang ◽  
Zhexuan Xu ◽  
Jiewei Lin ◽  
Zefeng Lin ◽  
Jingchao Wang ◽  
...  
Keyword(s):  
Cooling System ◽  
Combustion Engine ◽  
Coupling Effect ◽  
Combustion Process ◽  
Thermal Characteristics ◽  
Engine Performance ◽  
Operating Conditions ◽  
Coolant Flow ◽  
Coupled Modeling ◽  
Engine Cooling

The engine cooling system must be able to match up with the stable operating conditions so as to guarantee the engine performance. On the working cycle level, however, the dynamic thermo-state of engines has not been considered in the cooling strategy. Besides, the frequent over-cooling boiling inside the gallery changes the cooling capacity constantly. It is necessary to study the coupling effect caused by the interaction of cooling flow and in-cylinder combustion so as to provide details of the dynamic control of cooling systems. To this end, this study develops a coupled modeling scheme of the cooling process considering the interaction of combustion and coolant flow. The global reaction mechanism is used for the combustion process and the multiphase flow method is employed to simulate the coolant flow considering the wall boiling and the interphase forces. The two sub-models exchange information of in-cylinder temperature, heat transfer coefficient, and wall temperature to achieve the coupled computation. The proposed modeling process is verified through the measured diesel engine power, in-cylinder pressure, and fire surface temperature of cylinder head. Then the effects of different cooling conditions on the cyclic engine performances are analyzed and discussed.

Accelerating the Product Development of a Commercial Vehicle Radiator using Finite Element Analysis

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
P.R. Roy ◽  
V. Hariram ◽  
M. Subramanian
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Product Development ◽  
Commercial Vehicle ◽  
Cooling System ◽  
Experimental Testing ◽  
Engine Oil ◽  
Operating Pressure ◽  
Element Analysis ◽  
Engine Cooling

Emissions such as Nox and CO resulting from the combustion of the diesel engines in the commercial vehicles leads to environmental degradation and ozone layer depletion. Alarming environment trend forces the government institutions to develop and enforce strict emission laws for the next generation transportation vehicles. Stricter emission laws mean higher operating pressure, temperature, reduced weight, tight packaging space, engine downsizing etc. Engine cooling systems are the critical components in the managing the engine cooling requirement of the commercial vehicle. Generally engine cooling system includes radiator, charge air cooler, engine oil cooler etc. Product development of thermal management system using the traditional design process takes more time, resource and money. To solve the complex design problem, numerical technique such as finite element analysis is performed upfront in the product development of the radiator to evaluate the structure behaviour under mechanical loading. In this paper, internal static pressure analysis of a radiator is presented to showcase the benefits of using the finite element technique earlier in the product design phase. Pressure cycle life at a critical joint of the radiator is calculated using strain-life approach. Finite element analysis aids in visualization of the hot spots in the design, comparing different design options with less turnaround time. Experimental testing and prototypes can be reduced. Risk of a product being failed is greatly minimized by performing the numerical simulation.

scholarly journals Development of the design of an internal combustion engine cooling system with a pre-starting heating function

2021 ◽  
Vol 1 (1) ◽  
pp. 51-56
Author(s):  
N.A. Ivanov ◽  
◽  
D.V. Otmakhov ◽  
S.P. Zakharychev ◽  
O.V. Kazannikov ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Power Supply ◽  
Cooling System ◽  
Combustion Engine ◽  
Heating System ◽  
Internal Combustion ◽  
Warm Up ◽  
Limited Power ◽  
Absence Of Power ◽  
Engine Coolant

The main topic of the article is the development of an effective design for a pre-starting heating system for an internal combustion engine for conditions of limited power supply. The work to im-prove the design of light wheeled all-terrain vehicles on low pressure pneumatics is done at Pacific National University. Prototypes of light wheeled off-road vehicles are used mainly in agriculture and for forestry production. There are prerequisites for their use in oil and gas fields in the Far North conditions. This vehicle is operated all year round, in the absence of power supply, it is stored in the open air, so the problem of starting a cold engine is quite important, and the topic of creating a design for a pre-starting heating system for an internal combustion engine under conditions of limited or com-plete absence of power supply is relevant. The purpose of the work is to develop and study the efficiency of the pre-starting heating system for an internal combustion engine with liquid cooling for conditions of limited power supply. Our own design of the cooling system with a pre-starting heating function based on a gasoline burner was developed. To assess the efficiency of the engine warm-up process, the circuit was as-sembled on a light wheeled all-terrain vehicle. The experimental studies were carried out to deter-mine the regularity of changes in the temperature of the engine coolant during pre-starting heating at different ambient temperatures. The results of the experiment indicate the high efficiency of the developed system based on a gasoline burner. The average heating rate of the engine coolant during the warm-up process was 2.1 - 2.8 оС per minute, which indicates an intensive pace of pre-starting heating.

Study of the effect of the EGR heat exchanger on the internal combustion engine cooling system

2021 ◽  
Keyword(s):  
Heat Exchanger ◽  
Internal Combustion Engine ◽  
Cooling System ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Products ◽  
Simulation Software ◽  
One Dimensional ◽  
Engine Cooling ◽  
Recirculation System

The article presents a study and modification of the cooling system of a KAMAZ R6 in-line diesel engine using a heat exchanger of the combustion products recirculation system in the Simcenter AMESim one-dimensional simulation software. In the course of the research, the problems of engine overheating when using a heat exchanger of the combustion products recirculation system were identified, and possible solutions were proposed and investigated to optimize the temperature level of the coolant in the engine cooling system. Keywords one-dimensional modeling, 1D modeling, ICE, internal combustion engine, heat exchange, cooling system, CO, heat exchanger, heat exchanger, TA

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