Company officials announced a $240 million investment Thursday at the Toyota plant in Buffalo in Putnam County. Toyota will be adding a dedicated production line of hybrid transaxles. The company said no new jobs are expected to be created as a result of the investment. The plant assembles four-cylinder engines for the Corolla, V6 engines for the Highlander and Sienna and 6-speed automatic transmissions for Avalon, Camry, Highlander, RAV4, Sienna and Lexus ES 350.