BYD again responded to the “reported” incident: domestic and international standards are consistent

　　On May 29, BYD (002594.SZ) responded to a number of issues of concern to investors on the SZSE interactive platform. On the recent concerns about the fuel tank and evaporative emissions of PHEV models, BYD said that its atmospheric pressure fuel tank meets the evaporative emissions regulation standards.

　　According to BYD, BYD DM-i is a dual-motor series-parallel architecture based on the EV platform design, which realizes the decoupling (disconnecting connection) of the engine and wheels, allowing the engine to start flexibly in EV mode and the fuel vapor to be freely decoupled (pumping away the oil vapor in the carbon tank). Together with the synergistic strategy of multiple control units and in-depth research on the characteristics of carbon tanks, BYD has developed its own fuel vapor emission control technology for atmospheric tanks, which can comply with evaporative emission regulation standards.

　　This technology realizes that PHEV will automatically start the engine before the carbon tank is saturated, even if the vehicle is used in EV mode for a long time, and the problem can be solved in about 4 minutes, which neither increases fuel consumption nor noise, but also completes fuel vapor desorption, vehicle power generation and engine maintenance, which is both reasonable and compliant.

　　For the inconsistency of domestic and foreign vehicle standards, BYD said that there are atmospheric fuel tank technology solutions at home and abroad, there are also high-pressure fuel tank technology solutions. In terms of application, both domestic and foreign are the same. Both atmospheric and high-pressure fuel tanks are used, and both meet the local evaporative emission regulation standards.

　　The technical standards in a few countries and regions are different from China, mainly because their PHEV mainstream is P2 architecture, developed based on fuel car platform, which cannot decouple engine and wheels (decoupled connection), cannot start engine at any time in EV mode, and fuel vapor cannot be freely decoupled (pumping away oil vapor in carbon tank), so only high-pressure fuel tank can be used.

　　At present, BYD Song has replaced the once glorious Haval H6 as the sales champion of SUV models. According to the data of the Passenger Association, the cumulative sales of BYD Song in 2022 reached 478,000 units, and the sales from January to April this year reached 174,422 units, an increase of 76.5% year-on-year. In contrast, Haval H6 sales from January to April this year were 63,682 units, down 25.9% year-on-year.