Understanding the fuel savings potential from deploying hybrid cars in China

作者：Saxena Samveg^*; Phadke Amol; Gopal Anand

来源：Applied Energy, 2014, 113: 1127-1133.

DOI：10.1016/j.apenergy.2013.08.057

• Hybrids
• Vehicles
• Powertrains
• Fuel savings
• China
• Carbon dioxide

The majority of transportation-related CO2 growth will come from the developing world with projections suggesting that global CO2 emissions from transportation will at least double by 2050. Given that China will be a leading contributor to this growth in transportation-related CO2, this paper examines the impact of deploying different types of hybrid cars in China to offset some of the growth in CO2 emissions arising from rapidly growing vehicle sales.
To represent typical Chinese driving conditions, drive cycles are selected from 11 Chinese cities of different size, with the drive cycles capturing on peak and off peak driving times, and road types including freeways, major arterials, sub-arterials, and residential roads. The characteristics of the different drive cycles are compared against US drive cycles and it is found that Chinese driving often involves lower speed driving, a moderate stop frequency and more sudden acceleration and deceleration. The drive cycles are then used as inputs for powertrain models for a conventional engine-only vehicle, a mild parallel hybrid with integrated starter/generator, a power split hybrid, and a conventional gasoline vehicle with start stop functionality. The fuel savings potential from each vehicle architecture is compared against the conventional vehicle in US and Chinese driving conditions.
The results show that the driving conditions in China enable hybrid vehicles to achieve significantly greater fuel savings as compared with hybrids in the US, with parallel hybrids producing 25.5% fuel savings in China versus 13.2% fuel savings in the US and power split hybrids producing 53.6% fuel savings in China versus 32.6% fuel savings in the US. The fuel savings benefits from parallel and power split hybrids significantly exceed the fuel savings from conventional gasoline vehicles with start stop functionality for both the US and China. These results suggest that the increased cost of deploying hybrids will have significantly greater impact in Chinese driving conditions, and hybrid vehicles in China should be seriously considered for incentive programs (perhaps as part of the recently announced 2012-2020 China automotive industry development plan) to accelerate their deployment. Published by Elsevier Ltd.

• 出版日期2014-1