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the inertia of the air in the intake manifold.The torque response delay of the internal combustion engine has several causes: An internal combustion engine (especially diesel) has a certain delay in delivering the requested torque. When the drive is pressing the accelerator pedal, it requests more torque from the powertrain. There are two types of torque assistance: ![]() The electric motor can provide additional torque to the wheel, improving the overall torque response of the powertrain. Vehicles that have idle stop/start and energy management functions are called Micro Hybrids. It comes with an Energy Smart Management (ESM) function which allows energy created under braking and deceleration to be stored in the low voltage battery, helping to further reduce fuel consumption. Image: Renault 1.6 dCi engine (Micro Hybrid)Īn example for idle stop/start and energy management functions is the Renault engine 1.6 dCi. Further, the battery is recharged when the engine is working in the most fuel efficient points or when the vehicle is braking (through energy recuperation). In this way, the alternator doesn’t have to produce electrical energy, the load torque of the alternator is nearly zero, and the fuel consumption is reduces. If the vehicle has an energy management function, even if the engine is running, the battery supplies electrical energy to the consumers. After the engine is running, the electrical energy for all the electrical consumers is supplied by the alternator (generator), which is putting a load torque on the engine. In a conventional ICE vehicle, without any energy management, the primary function of the low voltage battery is to generate the electrical energy required for the engine to start. Most of the vehicles with idle stop/start function have also some sort of energy management function, which optimizes the consumption of the low voltage (12 V) battery energy. PARALLEL HYBRID VEHICLE PPT DRIVERWhen the driver shows the intention to drive (clutch pedal pressed or brake pedal released) the engine is restarted automatically. This function reduces the overall fuel consumption of the vehicle. When the vehicle is stationary, the stop/start (S&S) function switches off the internal combustion engine, without the intervention of the driver (through the ignition key). PE – power electronics module (MOT controller) PARALLEL HYBRID VEHICLE PPT FULLImage: Full Hybrid Electric Vehicle (FHEV) modes ![]()
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