Abstract:

Geely developed a completely new 3-cylinder 1.0 L turbocharged gasoline direct injection engine to fulfill the applications for both conventional and new energy vehicles. This engine incorporated several advanced technologies, such as top-mounted high pressure injector, turbocharger, dual variable valve timing (DVVT),
integrated exhaust manifold, variable oil pump. The results show that the combination of efficient combustion system, low friction design and innovative thermal management realizes the outstanding fuel economy, and the minimum brake specific fuel consumption is 230 g/(kWh) in the entire map. The base engine is intensively refined to achieve excellent NVH (noise, vibration and harshness) performance, eventually measurements show that this 3-cylinder engine can realize similar NVH performance as 4-cylinder inline engine.

Key words: gasoline engine, high pressure direct injection, turbocharging, combustion system, low friction