The phrase "a great engine of" is correct and usable in written English.
It can be used to describe something that drives or propels a significant force or influence, often in a positive context.
Example: "The new technology has become a great engine of innovation in the industry."
Alternatives: "a powerful driver of" or "a significant force behind".
On education – that grammar schools are a great engine of social mobility.
And I know -- our fight goes on to put America back to work and to make our economy a great engine of job growth.
Neither has financial services been a great engine of job creation: just 36,000 new posts were created in finance and closely associated sectors between 1991 and 2007.
But it has not yet faced the storms that would test whether it has once again secured its place as "a great engine of state" within a modern constitution.
Not only does it provide the food that all mankind requires, but it is also a great engine of economic growth for the three-quarters of the world's poor who live in the countryside.
And you don't develop a satisfying rejection of the myth that sports are a great engine of American social mobility, a disappointment this show shares with the film "The Blind Side".
In Cancun last week, she assured 200 representatives of the tourism industry that she would make tourism a greater engine of growth.
In recent years, Ms. Mulpuru said, the international arm of Walmart has been a greater engine of growth than either the domestic division or Sam's Club, and since 2009 Mr. McMillon has been running the international operation.
Charles Foster Kane, the great newspaperman, ends up unable to communicate, much as Mark Zuckerberg, the creator of a great engine for sharing, schmoozing and keeping in touch, is defined by his failure to connect.
Capitalism is a great engine, capable of producing great riches, but left alone it will produce inequalities so extreme that it will ultimately self-destruct.
The story of a young Jewish couple and the modernist house they build in pre-war Czechoslovakia (Mawer used as the model for their home Mies van der Rohe's Villa Tugendhat in Brno), The Glass Room is a superlative work of art: a novel replete with ideas that is also, thanks to a throbbing great engine of a plot, incredibly exciting and moving.
