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.

scholarly journals Heat Distribution of Micro Turbocharger Cooling System for Motorcycle Application

2019 ◽  
Vol 8 (3) ◽  
pp. 308-314
Keyword(s):  
Experimental Research ◽  
Piston Ring ◽  
Cooling System ◽  
Heat Distribution ◽  
Water Pump ◽  
The Past ◽  
Electric Water Pump ◽  
Air Blower ◽  
Turbine Bearing ◽  
The Impact

The heat produced in turbocharger has the potential to destroy the bearing system and the oil piston ring. For the past years, the researchers have focused on heat transfer of micro turbocharger. The lack of research on the cooling system of the turbocharger has motivated the author to publish this paper. In this paper, the electrical water pump with air blower is used to reduce the heat effect. The impact of adding electric water pump o heat distribution on turbocharger has been discovered by conducting experimental research. The experimental research was conducted on one cylinder, two-stroke with Lifan engine 160 cc equipped with the turbocharger. The temperatures of the turbine, bearing housing, coolant inlet and outlet are measured and analyzed in this turbocharged engine test rig.

scholarly journals Combustion Analysis of a Diesel Engine during Warm up at Different Coolant and Lubricating Oil Temperatures

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3931
Author(s):  
Faisal Lodi ◽  
Ali Zare ◽  
Priyanka Arora ◽  
Svetlana Stevanovic ◽  
Mohammad Jafari ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Ignition Delay ◽  
Peak Pressure ◽  
Cold Start ◽  
Lubricating Oil ◽  
Combustion Model ◽  
Injection Timing ◽  
Warm Up ◽  
Combustion Duration ◽  
Hot Start

A comprehensive analysis of combustion behaviour during cold, intermediately cold, warm and hot start stages of a diesel engine are presented. Experiments were conducted at 1500 rpm and 2000 rpm, and the discretisation of engine warm up into stages was facilitated by designing a custom drive cycle. Advanced injection timing, observed during the cold start period, led to longer ignition delay, shorter combustion duration, higher peak pressure and a higher peak apparent heat release rate (AHRR). The peak pressure was ~30% and 20% and the AHRR was ~2 to 5% and ±1% higher at 1500 rpm and 2000 rpm, respectively, during cold start, compared to the intermediate cold start. A retarded injection strategy during the intermediate cold start phase led to shorter ignition delay, longer combustion duration, lower peak pressure and lower peak AHRR. At 2000 rpm, an exceptional combustion behaviour led to a ~27% reduction in the AHRR at 25% load. Longer ignition delays and shorter combustion durations at 25% load were observed during the intermediately cold, warm and hot start segments. The mass fraction burned (MFB) was calculated using a single zone combustion model to analyse combustion parameters such as crank angle (CA) at 50% MFB, AHRR@CA50 and CA duration for 10–90% MFB.

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.

PERFORMANCE OF A WATER PUMP IN AN AUTOMOTIVE ENGINE COOLING SYSTEM

2016 ◽  
Vol 78 (10-2) ◽  
Author(s):  
Mohamad Lazim Mohamed Tasuni ◽  
Zulkarnain Abdul Latiff ◽  
Henry Nasution ◽  
Mohd Rozi Mohd Perang ◽  
Hishammudin Mohd Jamil ◽  
...  
Keyword(s):  
Cooling System ◽  
Maximum Power ◽  
Coolant Temperature ◽  
Electric Pump ◽  
Water Pump ◽  
Test Rig ◽  
Engine Operation ◽  
Automotive Engine ◽  
Engine Cooling ◽  
Simulator Test

A cooling system employed in an automobile is to maintain the desired coolant temperature thus ensuring for optimum engine operation. Forced convection obtained by means of a water pump will enhance the cooling effect. Thus it is necessary to understand the system’s pump operation and be able to provide for the ultimate cooling of the engine. The objective of this laboratory investigation is to study the water pump characteristics of an engine cooling system. The crucial water pump parameters are the head, power, and its efficiency. In order to investigate the water pump characteristic a dedicated automotive cooling simulator test rig was designed and developed. All of the data obtained are important towards designing for a more efficient water pump such as electric pump that is independent of the power from the engine. In addition to this fact, the simulator test rig can also be used to investigate for any other parameters and products such as radiator performance and electric pump before installation in the actual engine cooling system. From the experiment conducted to simulate for the performance of a cooling system of a Proton Wira (4G15), the maximum power equals to 37 W which indicates the efficiency of the pump is relatively too low as compared to the typical power consume by the pump from the engine which are about 1 to 2 kW. Whereas the maximum power and efficiency obtained from the simulator test rig simulator is equals to 42 W and 15% respectively.

scholarly journals Engine Performance and Emissions Analysis in a Cold, Intermediate and Hot Start Diesel Engine

2020 ◽  
Vol 10 (11) ◽  
pp. 3839 ◽  
Author(s):  
Faisal Lodi ◽  
Ali Zare ◽  
Priyanka Arora ◽  
Svetlana Stevanovic ◽  
Mohammad Jafari ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Cold Start ◽  
Lubricating Oil ◽  
Coolant Temperature ◽  
Effective Pressure ◽  
Warm Up ◽  
Hot Start ◽  
Depth Analysis ◽  
Performance And Emissions ◽  
The Impact

Presented in this paper is an in-depth analysis of the impact of engine start during various stages of engine warm up (cold, intermediate, and hot start stages) on the performance and emissions of a heavy-duty diesel engine. The experiments were performed at constant engine speeds of 1500 and 2000 rpm on a custom designed drive cycle. The intermediate start stage was found to be longer than the cold start stage. The oil warm up lagged the coolant warm up by approximately 10 °C. During the cold start stage, as the coolant temperature increased from ~25 to 60 °C, the brake specific fuel consumption (BSFC) decreased by approximately 2% to 10%. In the intermediate start stage, as the coolant temperature reached 70 °C and the injection retarded, the indicated mean effective pressure (IMEP) and the brake mean effective pressure (BMEP) decreased by approximately 2% to 3%, while the friction mean effective pressure (FMEP) decreased by approximately 60%. In this stage, the NOx emissions decreased by approximately 25% to 45%, while the HC emissions increased by approximately 12% to 18%. The normalised FMEP showed that higher energy losses at lower loads were most likely contributing to the heating of the lubricating oil.

Local Hot Spots of Electric Water Pump Casing Over Various Pumping Loads

2020 ◽  
Author(s):  
Younghyeon Kim ◽  
Yoora Choi ◽  
Sangseok Yu
Keyword(s):  
Temperature Distribution ◽  
Joule Heating ◽  
Hot Spots ◽  
Cooling System ◽  
Hot Spot ◽  
Maximum Temperature ◽  
Water Pump ◽  
Ir Camera ◽  
Heat Rejection ◽  
Electric Water Pump

Abstract The cooling system of an electric vehicle adopts an electric water pump. Since the lifespan of the battery is very sensitive to a very narrow temperature band, the cooling system provides key solutions. The electric water pump is a core component of the cooling system which satisfies performance and durability criteria. Since, a local hot spot of motor casing results in the degradation of motor lifespan, it is necessary to design the motor casing for effective heat rejection. In this study, two different motor casing designs are applied to reject the joule heating of the motor efficiently. The temperature distribution of each casing is investigated with an IR camera. The IR camera was used to identify the local hot spot where the heat was most generated in the pump. Since the joule heating is proportional to pump power, it is necessary to understand the operating characteristics of the electric water pump. The experimental apparatus includes a water reservoir, a bypass valve, pressure and temperature sensors, DAQ, and IR camera. The operating temperature is ranged from atmospheric temperature to 50°C. When the pump is operated with 25°C coolant, each experiment takes 1 hour for the steady-state conditions and maximum temperature up to 55 °C. Three different pump performance are investigated with two different pump casing. The coolant temperature is also changed from 25 °C to 50 °C. As a result, the local hot spot is strongly dependent to pump load and it is mainly observed near the cable connector. Since temperature distribution on the casing surface is also affected by local hot spots, it is necessary to optimize heat rejection by extended surface.

Engine thermomanagement with electrical components for fuel consumption reduction

2002 ◽  
Vol 3 (3) ◽  
pp. 157-170 ◽  
Author(s):  
E Cortona ◽  
C. H. Onder ◽  
L Guzzella
Keyword(s):  
Fuel Consumption ◽  
Cooling System ◽  
Combustion Engine ◽  
Cold Start ◽  
Operating Conditions ◽  
Coolant Temperature ◽  
Engine Operation ◽  
Cooling Systems ◽  
Engine Efficiency ◽  
Model Based

This paper proposes a solution for advanced temperature control of the relevant temperature of a combustion engine. It analyses the possibility of reducing vehicle fuel consumption by improving engine thermomanagement. In conventional applications, combustion engine cooling systems are designed to guarantee sufficient heat removal at full load. The cooling pump is belt-driven by the combustion engine crankshaft, resulting in a direct coupling of engine and cooling pump speeds. It is dimensioned such that it can guarantee adequate performance over the full engine speed range. This causes an excessive flow of cooling fluid at part-load conditions and at engine cold-start. This negatively affects the engine efficiency and, as a consequence, the overall fuel consumption. Moreover, state-of-the-art cooling systems allow the control of the coolant temperature only by expansion thermostats (solid-to-liquid phase wax actuators). The resulting coolant temperature does not permit engine efficiency to be optimized. In this paper, active control of the coolant flow as well as of the coolant temperature has been realized using an electrical cooling pump and an electrically driven valve which controls the flow distribution between the radiator and its bypass. For this purpose, a control-oriented model of the whole cooling system has been derived. Model-based feedforward and feedback controls of coolant temperature and flow have been designed and tested. With the additional actuators and the model-based control scheme, a good performance in terms of fast heat-up and small temperature overshoot has been achieved. The improvements in fuel consumption obtained with the proposed configuration have been verified on a dynamic testbench. Both engine cold-start under stationary engine operation and the European driving cycle MVEG-A with engine cold-start were tested. The fuel consumption reductions achieved during these tests vary between 2.8 and 4.5 per cent, depending on the engine operating conditions. Compared to vehicle mass reduction or internal engine improvements, engine thermomanagement is a simple, flexible and cost efficient solution for improving system performance, i.e. fuel consumption.

The Performance Analysis and Motor Design of Electronic Water Pump Based on Pumplinx and Maxwell

2021 ◽  
Vol 14 ◽  
Author(s):  
Mingyue Zhang ◽  
Xiaobin Fan ◽  
Feng Wang ◽  
Jing Gan
Keyword(s):  
Direct Current ◽  
Cooling System ◽  
Design Method ◽  
Maximum Efficiency ◽  
Water Pump ◽  
Running Water ◽  
Direct Current Motor ◽  
Pump Head ◽  
Electric Water Pump ◽  
Brushless Direct Current Motor

Background: For the cooling system of the traditional new-type engine and new-energy vehicle, the water pump is the core of them. If the design of the water pump is not reasonable, the engine will be overcooled or overheated, which will affect the efficiency of the engine. Therefore, it is significant to propose a design method of electronic water pump for automobiles based on active regulation. Objective: In this study, an electric water pump was designed according to the condition in n = 4200r/min, Q = 90L/min, and H ≧ 4.4m. The flow, head, and efficiency and power of this electric water pump will be discussed. And a brushless direct current motor for this pump was designed and analyzed. Methods: The flow details of the pump, such as pressure distribution, velocity distribution, and turbulent kinetic energy distribution were obtained by Pumplinx. The head, efficiency, and power of the pump were established by the analysis of the flow field of the pump. Then, based on the working conditions of the pump mentioned above, a brushless direct current motor for the pump was designed by Maxwell and its performance was also analyzed. Results: The experimental results showed that the maximum efficiency of the motor reached 72%, the maximum efficiency point of the motor was near the rated speed, and the efficiency of the motor at rated power was 66.31%. Conclusion: The results showed that the complex condition of running water inside the pump can be exactly stimulated by the Computational Fluid Dynamics technique, especially about the pump head and its efficiency, which provided the theoretical foundation for the later application research and development of automotive electronic water pump.

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%.

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