An Experimental Study on the Clutch-Type Water Pump of Diesel Passenger Vehicle for Reducing Fuel Consumption and CO2 Emission

2011 ◽  
Author(s):  
Soo-jin Jeong ◽  
Woo-seung Kim ◽  
Chang-boke Oh ◽  
Jung-kwon Park ◽  
Ho-kil Lee ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Cooling System ◽  
Cooling Water ◽  
Optimal Operation ◽  
Engine Oil ◽  
Water Pump ◽  
Control Logic ◽  
Pump System ◽  
Warm Up ◽  
Type Water

A typical cooling system of an engine relies on a water pump that circulates the coolant through the system. The pump is typically driven by the crankshaft through a mechanical link with engine starting. In order to reduce the friction and warm-up time of an engine, the clutch-type water pump (CWP) was applied in 2.0 liter diesel vehicle. The clutch-type water pump can force cooling water to supply into an engine by the operation of an electromagnetic clutch equipped as the inner part of pump system. The operation of CWP is decided by temperature of cooling water and engine oil. And, the control logic for an optimal operation of the clutch-type water pump was developed and applied in engine and vehicle tests. in this study, the warm-up time was measured with the conventional water pump and clutch-type water pump in engine tests. And the emission and the fuel consumption were evaluated under NEDC mode in vehicle tests. Also, tests were carried out at the various temperature conditions starting the operation of CWP. As the results, the application of CWP can improve the fuel consumption and CO2 reduction by about 3%.

Effective Fuel Consumption by Improving Cooling Water Flow Rate in IC Engine

2015 ◽  
Vol 812 ◽  
pp. 112-117
Author(s):  
K.M. Kumar ◽  
P. Venkateswaran ◽  
P. Suresh
Keyword(s):  
Flow Rate ◽  
Cooling System ◽  
Water Flow Rate ◽  
Research Work ◽  
Cooling Water ◽  
Major Change ◽  
Clear Understanding ◽  
Water Pump ◽  
Ic Engine ◽  
Cooling Water Flow Rate

The coolant (water) pump assumes an important role of cooling system in IC engines. With upgrading of the engine power by turbocharging and turbo inter cooling, the water pump capacity needs to be increased corresponding to the power. This capacity enhancement has to be achieved without calling for a major change in the existing water pump, envelop and related fitment details. This requires a clear understanding of centrifugal pump for its performance parameter. One such engine is upgraded by turbocharging from 195PS to 240PS @2200 rpm. Improving water pump flow by changing the impeller dimensions, impeller casing, increase the suction, delivery pipe diameter had been done. Validation of the water pump in its actual engine installation was taken up as a part of the research work. Flow rate comparison of the new pump with the existing pump was made and the results were analyzed. The new water pump gives better flow rates for the engine speeds up to1800 rpm, beyond which the flow rate is slightly lesser than the existing pump.

Numerical Simulation of Fuel Consumption of Vehicle Cold Start in Low Temperature

2013 ◽  
Vol 291-294 ◽  
pp. 1925-1929 ◽  
Author(s):  
Jing Shun Fu ◽  
Zheng Feng
Keyword(s):  
Numerical Simulation ◽  
Low Temperature ◽  
Fuel Consumption ◽  
Cooling System ◽  
Cooling Water ◽  
Cold Start ◽  
System Model ◽  
Engine Cooling ◽  
Temperature Environment ◽  
The Relationship

Building an engine cooling system model by GT-cool to analyze the fuel consumption of vehicle cold start in the low temperature environment stage.Getting the relationship between fuel consumption of vehicle cold start and the temperature of cooling water by model calculation.Providing a basis for optimizing the design of the engine cooling system.

Investigation of the cavitation performance in an engine cooling water pump at different temperature

2020 ◽  
pp. 095765092098464
Author(s):  
We Li ◽  
Pu Wu ◽  
Yongfei Yang ◽  
Weidong Shi ◽  
Weiqiang Li
Keyword(s):  
High Speed ◽  
Cooling System ◽  
Cooling Water ◽  
High Speed Photography ◽  
Asymmetric Distribution ◽  
Water Pump ◽  
Engine Cooling ◽  
Cavitation Performance ◽  
Working Medium ◽  
Different Temperatures

Cavitation damage in engine cooling water pump is the main factor that shortens the lifespan of the cooling system and gives rise to undesirable phenomena such as vibration and noise. In order to reveal the influence of key factors such as temperature and speed on the cavitation performance of engine cooling water pump, the cavitation performance of the engine cooling water pump under different rotating speeds and temperatures is obtained through the experimental study, and the cavitation flow pattern in the engine cooling water pump under different temperatures is captured using high-speed photography. The result shows that, as the temperature of the working medium changes from 25 °C to 70 °C, the head of the pump increases by 5.9% under the part-loading condition, the efficiency has an increase by 7.1% near the design condition and the shaft power keeps decrease by about 5.6%. Cavitation performance under different rotating speeds is found not to agree with the similar law. With the increase of temperature, the inlet pressure of cavitation initial increases and the cavitation performance deteriorates, the cavitation distribution region inside the impeller gradually expands and presents asymmetric distribution, indicating that thermodynamic effect has a positive effect on the occurrence of cavitation in the engine cooling water pump.

scholarly journals Simulation of bypass electric water pump to reduce the engine warm-up time

2021 ◽  
Vol 15 (3) ◽  
pp. 8241-8252
Author(s):  
Rifqi Irzuan Abdul Jalal ◽  
M.A Mohd Yusoff ◽  
H.M Abid Hasan ◽  
M.N Yahya
Keyword(s):  
Cooling System ◽  
Block Design ◽  
Cold Start ◽  
Friction Model ◽  
Engine Block ◽  
Coolant Temperature ◽  
Combustion Model ◽  
Water Pump ◽  
Warm Up ◽  
Electric Water Pump

There are several strategies have been developed in the automotive cooling system to improve engine thermal management. Basically, these designs use controllable actuators and mechatronic components such as electric water pump, controllable thermostat, and controllable electric fan to improve engine temperature control on most operating ranges. Most of the strategies are complicated and costly. This paper introduced a different approach to improve coolant temperature warm-up during cold start. The new strategy was by promoting a higher coolant flow rate inside the engine block by just installing an electric water pump in the bypass hose. The new approach’s cold start performance was studied using GT-SUITE on a transient model, complete with finite-element of engine block design, lubrication system, components friction model, engine with combustion model and vehicle system. The proposed strategy clearly showed faster coolant temperature increase (18 seconds faster compared to the conventional cooling system). The strategy not only increase the coolant temperature faster, but also increases the oil temperature faster, lower Friction Mean Effective Pressure (FMEP), and lower fuel consumption at certain condition during the warm-up period.

Power characteristics of variable frequency speed control-based water pumps in open cooling water systems

2017 ◽  
Vol 39 (3) ◽  
pp. 284-294
Author(s):  
Yiping Song ◽  
Jianing Zhao
Keyword(s):  
Characteristic Equation ◽  
Water System ◽  
Cooling Water ◽  
Water Systems ◽  
Open Loop ◽  
Variable Frequency ◽  
Water Pump ◽  
Pump System ◽  
Power Characteristics ◽  
Water Pumps

The operational power characteristics of variable frequency speed control-based water pumps in an open cooling water system were studied experimentally. It was found through this research that before and after frequency conversion, the ratio of the power of a particular frequency to the power of the rated frequency of the water pump system shows a third-power relationship. A data fitting method was used to obtain the equation for the power and frequency ratio of the system under the overall operating conditions. The experiment shows that the system height difference has no effect on the basic form of the characteristic equation. Finally, when unified consideration is given to the pump, motor and frequency converter, the calculated power of the water pump system is very close to the actual value.This power characteristic equation contributes to calculations relating to the water pump operational speed regulation in an open cooling water system. Practical application: Variable frequency speed-regulating systems for pumps are applied in open loop water systems, such as those supplying cooling towers. However, the standard cube law which is used to determine the power of the water pump system is inappropriate and exaggerates the potential energy-saving. This study determined a new energy model for the water pump system that can more accurately calculate the total power of the variable frequency controlled water pump when used in open loop systems.

Failure Analysis and Strategy Investigation on Local Thinning of the Warm-Up Line in Auxiliary Feed Water Pump System

2013 ◽  
Author(s):  
Liang Zhao ◽  
Kunjie Luo ◽  
Jianqun Hu ◽  
Xin Wang ◽  
Mingjun Chen
Keyword(s):  
Influence Factors ◽  
Fem Analysis ◽  
Thickness Measurement ◽  
Feed Water ◽  
Water Pump ◽  
Pump System ◽  
Chemical Test ◽  
Warm Up ◽  
Suitability Assessment ◽  
Wall Thinning

Wall thinning measurement, physical & chemical test, FEM analysis was conducted on one of an ASG small bore tube. The results show that wall thinning area mainly distribute downstream of the orifice and typical FAC feature were observed. According to FAC mechanism, influence factors and the service conditions, wall thinning are due to FAC. The function of this tube is keep the auxiliary feed water pump always ready, but the tube material and service temperature are susceptible to FAC. This paper discusses the preventive maintenance strategy of this kind of tubes and recommends that the wall thickness measurement should be conducted after 4 years serving. The thickness inspection area is twice times tube diameter downstream of the orifice; furthermore, the suitability assessment rule for similar tubes was established.

Influence of Different Impeller Diameter on Cavitation Performance in an Engine Cooling Water Pump

2015 ◽  
Author(s):  
Wei Li ◽  
Weiqiang Li ◽  
Weidong Shi ◽  
Ling Zhou ◽  
Bing Pei
Keyword(s):  
Volume Fraction ◽  
Cooling System ◽  
Three Dimensional ◽  
Cooling Water ◽  
Absolute Pressure ◽  
Water Pump ◽  
Hexahedral Mesh ◽  
Engine Cooling ◽  
Cavitation Performance ◽  
Critical Cavitation

The engine cooling water pump (ECWP) is an important part in the motor and engine. Using the advanced numerical methods and tools to enhance the ECWP performance, not only could reduce the power consumption and weight, but also can promote the safety and reliability of the vehicle system. The cavitation damage in the ECWP shortens the reliability and life of the motor cooling system, as well as produces vibration and noise. Cavitation in the ECWP has been become an important research topic. To investigate the cavitation performance of ECWP with different impeller diameter, the three dimensional turbulent flow in the ECWP with different impeller diameter was numerically simulated employing the time averaged N-S equation, the standard k-ε turbulent model and multiphase flow model by ANSYS-CFX software. The structured hexahedral mesh has been generated for improving the accuracy of numerical simulation. Comparing with the experimental pump performance results, the cavitation performance is accurately predicted based on structured mesh and cavitation model. The comparison of fluid static pressure and vapor volume fraction contours, hydraulic and cavitation performance was made among different impeller diameter. The cavitation performance curve and bubble distributions under different impeller diameter were compared and analyzed, we find that absolute pressure at the critical cavitation point becomes higher with the decreasing of the impeller diameter, and the anti-cavitation performance becomes worse caused by the increasing of the volume fraction in the impeller. Therefore, there is an optimum impeller diameter value to guarantee the anti-cavitation performance and hydraulic performance of the investigated pump.

scholarly journals Fracture analysis of a cooling water pump shaft

2018 ◽  
Vol 188 ◽  
pp. 04022
Author(s):  
Dimitris G. Papageorgiou ◽  
Kyriakos A. Kovsenoglou ◽  
Petros Bournelis ◽  
Carmen Medrea
Keyword(s):  
Cooling System ◽  
Material Selection ◽  
Cooling Water ◽  
304 Stainless Steel ◽  
Boundary Carbide ◽  
Water Pump ◽  
Finite Elements Analysis ◽  
Engine Cooling ◽  
Pump Shaft ◽  
Component Failures

Six shaft failures were encountered in a centrifugal water pump, part of the engine cooling system of a container ship. The last two failed pieces were received for analysis. A detailed study was carried out to determine the cause of the component failures. Historical data was collected, visual inspection was performed and a photographic file was created. The pieces were measured in order to record their general features and a 3-D model was generated. Hardness measurements were carried out. Microstructure was examined by means of light microscopy. A finite element simulation was conducted in order to determine the stress topology and to identify possible critical areas. Chemical analysis was carried out. The shafts were manufactured onboard, from AISI 304 stainless steel. The low hardness of both pieces indicates insufficient mechanical properties. Microstructural examination showed characteristic microstructure of coarse austenite. The presence annealing process derived twins and limited grain-boundary carbide precipitates were verified. The shafts failed due to torsional fatigue. Fracture initiated at the keyway on the propeller side as it was predicted from the finite elements analysis. Material selection material has and poor machining were found to be the main cause of failure. Appropriate recommendations were provided.

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