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India is rapidly transitioning to environment friendly green mobility technology. This is evident from leapfrog move to Bharat Stage VI stringent emissions norms, by just providing a mere window of three years to the automotive industry. The challenge is not to manufacture new subsystems but is getting customized emission solution technology tested and validated for Indian conditions to meet BSVI emission norms by April 2020. With reference to recent reports published by NITI Aayog (Government of India Think Tank), xEV’s can be incentivized and promoted as an emission free solution. With internal combustion engine complex architectures to meet BSVI emission norms and proposed government incentive, many passenger car OEM’s are considering electric vehicle (EV) powertrain development. In view of this, a study was envisaged to estimate EV powertrain challenges for Pune (India) city real world driving conditions.

With the upcoming regulations for fuel economy and emissions, there is a significant interest among vehicle OEMs and fleet managers in developing computational methodologies to help understand the influence and interactions of various key parameters on Fuel Economy and carbon dioxide emissions. The analysis of the vehicle as a complete system enables designers to understand the local and global effects of various technologies that can be employed for fuel economy and emission improvement. In addition, there is a particular interest in not only quantifying the benefit over standard duty-cycles but also for real world driving conditions. The present study investigates impact of exhaust heat recovery system (EHRS) on a typical 1.2L naturally aspirated gasoline engine passenger car representative of the India market.

With the upcoming regulations for fuel economy and emissions, there is a significant interest among vehicle OEMs and fleet managers in developing computational methodologies to help understand the influence and interactions of various key parameters on Fuel Economy and carbon-di-oxide emissions. The analysis of the vehicle as a complete system enables designers to understand the local and global effects of various technologies that can be employed for fuel economy and emission improvement. In addition, there is a particular interest in not only quantifying the benefit over standard duty-cycles but also for real world driving conditions. Present study investigates impact of exhaust heat recovery system (EHRS) on a typical 1.2L naturally aspirated gasoline engine passenger car representative of the India market.

Vehicle development teams find it challenging to predict what their Heating, Ventilation and Air-Conditioning (HVAC) module performance will be for cold ambient (∼ -20 deg. C) test cycles such as defrost and cabin warm-up before the car is built. This uncertainty in predictions comes from varying engine heat rejection to coolant due to cold cylinder wall temperatures, calibration changes and degraded performance of various components within the cooling system such as the coolant pump owing to higher viscosity of the coolant. Measuring engine heat rejection at cold ambient is extremely difficult as the engine warms up as soon as it is fired. Multiple measurement points require long lead time to soak to the cold target temperature. It is a common practice to adjust engine calibration parameters to warm up coolant as fast as possible for an adequate defrost and cabin warm-up performance.

As one of the most complicated parts of an internal combustion Engine, cylinder head is directly exposed to high combustion pressures and temperatures. Cooling must be provided for the heated surfaces to avoid overheating. However over-cooling will cause lower overall efficiency and high emission. Therefore, an optimal design of the cooling system is required to maintain trouble-free operation of engine. For single cylinder naturally aspirated Compression Ignition (CI) engines, on account of space restrictions, designing of cooling jacket is very critical. Engineers invest a large amount of time and serious effort to optimize the flow through engine cooling jacket with limited detailed information of conducting flow and heat transfer. This paper therefore, investigates cooling performance of a single cylinder 510cc production diesel engine.

Due to reciprocating nature of IC engine, flow physics in intake manifold is complex and has significant effect on volumetric efficiency. Variable length intake manifold technology offers potential for improving engine performance. This paper therefore investigated effect of intake length on volumetric efficiency for wider range of engine speeds. For this purpose 1-D thermodynamic engine model of a single cylinder 611cc standard CFR engine capable of predicting pressure waves in the intake was developed. For validation, pressure waves were predicted at two different locations on intake manifold and compared against test data. This model was used to predict volumetric efficiency for different intake lengths and engine speeds. Volumetric efficiency was found to be a function of both engine speed and intake length, more so at higher engine speeds. Frequency analysis of intake pressure waves during suction stroke and intake valve closed phase was carried out separately.