Browse Publications Technical Papers 2019-01-1193

Development of two new high specific output 3 cylinder engines for the global market with capacities of 1.2l and 1.5l 2019-01-1193

MAHLE Powertrain has developed an industrialised version of its 3 cylinder downsizing engine as a low cost high specific output engine for the global market. The engine has been developed in both 1.2l & 1.5l capacities with the maximum commonality being maintained between the two variants. Through careful design the engines are capable of delivering exceptionally high specific torque and power outputs whilst utilising simple low cost technology. At the same time the engines have also been engineered to meet the requirements of latest Euro 6c and China 6a emissions standards. The 1.2l and 1.5l engines are rated at 30bar Brake Mean Effective Pressure (BMEP) and 100 kW/l and 28bar BMEP and 94kW/l respectively. The engines provide the capability of delivering competitive real world fuel economy that has been enabled through a combination of low friction design and reduced pumping losses, from the downsizing effect, together with optimised thermal management and combustion systems, which allow over 70kW/l to be produced under stoichiometric operating conditions. This paper discusses some of the key design features and performance attributes of these two new high specific output 3 cylinder gasoline engines.


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