There are no details on the deal, as the closing of the acquisition is expected during the third quarter.

Silicon Valley-based EDI was most known for providing powertrains for all-electric and plug-in hybrid buses and trucks and that's what Cummins would like to do in the future.

Earlier Cummins acquired also UK-based Johnson Matthey Battery Systems and North America-based Brammo.

"Cummins began developing its electrification capabilities more than a decade ago. During the past nine months, it accelerated investment in this business when it undertook strategic efforts to build capabilities across the entire range of electric storage, as evidenced by the acquisitions of UK-based Johnson Matthey Battery Systems and North America-based Brammo. Upon the addition of its fully-electric and unique four-mode hybrid powertrains, EDI will broaden Cummins' electrification expertise and products. EDI's hybrid system is the most versatile on the market today, able to switch, in real time, between fully electric, series and parallel modes."