Initially, the BYD Qin Plus was only available with a plug-in hybrid powertrain. It is BYD’s latest hybrid system called the DM-i. The Qin Plus was one of the first BYD products with the DM-i system to be introduced to the market, alongside the Tang DM-i and Song Plus DM-i crossovers; the market launch event was in January 2021.
The DM-i powertrain of the Qin Plus combines a 1.5-litre naturally aspirated engine with a single electric motor for a total output of about 170 horsepower (127 kW; 172 PS). The engine’s thermal efficiency ratio is claimed to be at the industry-leading 43% as of 2021. Fuel consumption of the Qin Plus does not exceed 3.8 litres per 100 kilometres (74 mpg‑imp; 62 mpg‑US). The Qin Plus sprints from 0 to 100 km/h (0 to 62 mph) in under four seconds and has over 1,000 kilometres (620 mi) of combined range. Its “blade battery” provides an electric range of 50–120 km. The car is equipped with an E-CVT transmission.
The car’s drivetrain was named “cloud-plug-in hybrid” (Xiaoyun-Plug-in hybrid) by the manufacturer.
The 1.5-litre naturally aspirated engine of the Qin Plus DM-i uses the Atkinson cycle and features cooled exhaust gas recirculation (EGR), a split cooling system (the engine cooling circuit is split into two parts, one for the cylinder head and one for the block) and an electric water pump. The engine develops a maximum power output of 81 kilowatts (109 hp; 110 PS) at 6000 rpm, and the peak torque is 135 N⋅m (100 lb⋅ft; 14 kg⋅m) at 4500 rpm. The compression ratio is 15.5:1 and it meets the National VI B emission standard in China.
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