关键词: 客户动力需求；重型商用车；功率提升；动力匹配；平衡点

Abstract: In the line-haul logistics market for heavy-duty commercial vehicles, the trend toward high power paired with low speed ratios is becoming increasingly pronounced. To strike a trade-off point of customers power demands for high power with the pursuit of ultimate fuel efficiency for vehicles, this paper proposes an innovative method for assessing customers power needs across different power models. This approach is based on massive existing vehicle operation data. Specifically, it calculates the average operating power of vehicles within the same market segment and under identical operating conditions. The increase in this average power is used to quantify customers' psychological expectation for power improvement as power increases. Combining actual operating conditions, the optimal power matching is recommended. Analysis shows that under plain freeway condition and mountainous freeway condition, a unit power increase in corresponds to a rise in customer power demand of 0.09% and 0.12%, respectively. The findings indicate, in climb conditions, an 17 L, 588 kW model consumes 1.15 L/100 km less fuel and achieves a 7.9% higher speed than a 15 L, 500 kW model; under comprehensive conditions, the 17 L, 588 kW model maintains similar fuel consumption while achieving a 6.9% higher average speed than 15 L, 500 kW model.

Key words: customers power demand; heavy-duty commercial vehicles; power boost; power matching; trade-off point