COLUMBUS, Ind. — Cummins saw its engine sales jump 45% in the second quarter compared to the same quarter a year ago, according to its latest financial filings.

“We had an outstanding quarter,” said Cummins Chairman and CEO, Tim Solso. “The work we have done to strengthen our manufacturing operations during the downturn has resulted in significant productivity gains, and we continue to benefit from our leadership position in large and growing international markets such as China, India and Brazil.”

Cummins enjoyed a 51% increase in sales outside the US in the second quarter, accounting for 64% of its total revenue.

Engine segment sales totaled US$1.9 billion on the quarter, up 45%, while total on-highway engine sales increased 36% year-over-year. However, in North America, the costly new EPA emissions requirements caused unit sales to decline 58% in Q2 compared to the same period last year.

North American market share gains and international demand helped boost Cummins to a 47% increase in medium-duty truck and bus engine sales, the company reported.