In order to meet the market needs for high efficiency and high power output, Mitsubishi
Heavy Industries Engine & Turbocharger, Ltd. (MHIET) has been working on the development of
the new G16NB gas engine for generator use. The features of this new gas engine in terms of its
performance were introduced in detail in Mitsubishi Heavy Industries Technical Review Vol. 52
(achieving power generation efficiency of over 44.7%, etc.). This paper will focus on the following
outcomes relating to endurance testing and technologies for improving the combustion reliability;
(1) total verification testing hours reaching 4,700 hours (as of November 2016), (2) excellent
results of endurance testing for overloading/overspeed, (3) improvement in the accuracy of
knocking detection by about 30 to 40%, (4) reduction in the combustion variation by 20%, and (5)
increased reliability of the pre-chamber gas supply valve (reduction of the flowback by 76%).
