This paper discusses the design, modeling, and development of small motorcycle equipped with a HCCI engine\n \n\n \n!\" \n\n\n#\n\n\n$%&\n\n!\nrun in HCCI combustion mode and integrated into a prototype vehicle. Dual-fuel and external EGR strategies were\nused to upgrade the engine speed and torque capabilities of the engine to meet the requirements of the powertrain.\nAn electrical generator, hub-motor, battery pack and other power electronics devices were used to form the electrical\nsystem for the vehicle. The advantages of the proposed design compared to the original motorcycle with SI engine\nand CVT transmission are: 1) a reduction in noxious emissions due to the HCCI combustion, and 2) higher fuel\neconomy in city driving because of the HCCI engine and series hybrid powertrain. Fuel economy was measured by\ndriving the motorcycle on a chassis dynamometer using a sequence of ECE-40 driving cycles. The overall fuel economy\nwas measured to be 73.7 km/L which represents a 139.3% increase in fuel economy over the baseline vehicle.
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