ABSTRACT
This paper presents an overview of Changan’s modular 3 and 4 cylinder gasoline New Engine for the 2020s. The core design exhibits compact dimensions, low friction and a high efficiency combustion system which is described with its specification and the resultant attribute performance of the launch variant. The modular nature of the engine permits low cost and rapid development of additional variants to meet market requirements.
Following a successful handover of the first 1.4 litre base engine to Changan HQ in Chongqing, the UK R&D centre has been focused on future derivatives of the engine. The drivers for engine evolution are improved fuel consumption and emissions as well as the ability to meet the needs of electrified powertrains.
The second half of the paper focuses on combustion system development of the second-generation New Engine and the areas addressed include combustion chamber and intake port design. Use of early and late inlet valve closing as a means to increase compression ratio has been investigated along with a range of boosting technologies. The engine design and hardware specified are chosen to meet the requirements of the challenging Chinese vehicle market. Finally, the performance of this second-generation engine are assessed for fuel economy and performance at a range of conditions which include full load, part load and catalyst heating conditions.
