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As India is becoming a hub for design and manufacture of various automotive parts for the global market, it becomes important to verify whether the design is safe at extreme thermal operating conditions, before the introduction of the product to market. For our current work, we have identified Vacuum Pumps, which are principally used in diesel applications for generating vacuum primarily for the servo brake application. With the emission norms getting modified, EGR and turbo charging are employed to meet them. The vacuum signal is used for EGR actuation, turbo charger waste gate actuation, etc. The multi functional application of vacuum pumps and the functional criticality in application like braking system demand an efficient and reliable performance. Finite element analysis (FEA) is one such tool, which can be used to verify the product/components for structural and thermal rigidity at different operating conditions.

Automobile OEM's around the world are looking to improve their overall vehicle and engine efficiency in terms of fuel economy and power output. Efficiency improvement is possible by cutting down the engine parasitic loads. One such parasitic load is the oil pump, which lubricates the engine parts. Oil pump is the heart of an engine lubrication system, and its important functions are cooling and lubricating the engine moving parts by delivering adequate oil flow based on the engine demand. Insufficient or no oil delivery from the oil pump leads to the seizure of the engine. The internal vane type oil pump is one kind of positive displacement type pump, where oil gets transferred from the oil sump into the inlet volume. The negative pressure is created inside the pumping chamber due to increase in area. As the vane rotates eccentrically with respect to the stator, it delivers the oil at a higher pressure from inlet to outlet and supplies to engine gallery through the discharge port.

Increasing the efficiency of the Engine parts and reduction in development time with good accuracy are the challenges in the Automotive Industry. Lubricating oil pump has been selected for this study. Existing literatures explain the methodology to generate the rotor profile from the given geometrical parameters of the rotor like eccentricity, tooth radius etc. Invariably the specifications to design the pump are provided in terms of pump performance at various operating conditions. The analytical model developed in this study uses the performance and boundary specifications to generate the rotor profile and to estimate the flow rate at various operating conditions of the pump. This methodology includes the generation of trochoidal profile for inner rotor and modified conjugate profile for the outer rotor and the volume calculation of number of chambers (N) which are created between the rotors during meshing.

Automobile OEM's around the world are looking to improve their overall vehicle and engine efficiency in terms of fuel economy and power output. Efficiency improvement is possible by cutting down the engine parasitic loads. Lubrication oil pump is one such source for parasitic loss of multijet diesel engine. One best way of reducing the same is by optimizing the power consumed by the oil pump without appreciably affecting the flow requirements of the engine. This paper describes an effective approach to bring down the power consumption of a fixed displacement oil pump by keying out various factors contributing for the same. Detailed here are the methods used for identifying those factors, modifications carried out in the design, and testing methods employed for the estimation, together with the results achieved. The test results show that it is possible to improve the power consumption of oil pump by 18% as a result of this study.

In today's scenario, improving the efficiency of the vehicle has become important and challenging. This is done by improving the efficiencies of individual parts that contribute to overall vehicle efficiency. In this paper, we have identified one such part, namely Vacuum Pump used in a multijet diesel engine and we have identified vacuum achievement time & power consumption as the performance parameters. A detailed analysis was done by way of building the cause and effect diagram to prioritize the effects. A detailed experimental study was conducted to identify the optimum level for each identified parameter, followed by checking the performance at that optimum condition. The test results show that it is possible to improve the performance of vacuum pump by 50% by combining the effects of all parameter from the existing level. Additionally this exercise also contributed to reduce the overall weight of the product by 25%.

The objective of present study is to predict and analyze the flow through the Air Intake System (AIS) of a multicylinder S.I. engine by Computational Fluid Dynamics (CFD). The predicted results are validated by experimental data. Three-dimensional model of air intake system was created by using the commercially available software and the mesh was generated using the Tet-hybrid scheme. The pressure boundary conditions are used to define the fluid pressure at the inlet and outlet of the flow domain. Three different throttle conditions namely idling, 50% throttle opening and wide open throttling (WOT) are considered. Flow through the domain is analyzed for all the three cylinders. The CFD plots give informative pictures of the flow field, which will help the designer to understand the effect of various components of air intake system. The predicted airflow rate shows good agreement with the experimental results.