Development of a Mercedes-Benz natural gas engine M366LAG with a lean-burn combustion system

摘要

The heavy-duty natural gas engine has been the subject of growing interest as a feasible alternative for the reduction of pollution levels in urban centers, where currently diesel vehicles predominate. This paper summarizes the development of the Mercedes-Benz compressed natural gas engine M366LAG, which reached competitive characteristics of diesel engines, like fuel consumption, weight/power ratio, and thermal loading by matching the turbocharging technology with charge cooler and the concept of lean-burn combustion. An oxidation catalyst was developed and emissions less than 50% of the EURO II limits were achieved. With 5,958 l of displacement and 6 cylinders in line, the M366LAG provides a power of 170 kW @ 2,600 min{sup}(-1 )and 720 Nm @ 1,560 min{sup}(-1) as maximum torque.