The phrase "as the engine that" is correct and usable in written English.
It can be used to describe something that drives or powers a particular process or system, often in a metaphorical sense.
Example: "The new software acts as the engine that drives our data analysis capabilities forward."
Alternatives: "as the driving force that" or "as the catalyst that".
We are banking on hydropower as the engine that will finance our development".
Modeling can be thought of as the engine that drives sales intuition.
The challenges that clubs and individuals can issue each other, for instance, serve as the engine that keeps the momentum of player engagement going.
One day Mr. Bush is heralding his tax cuts as the engine that, as he told voters recently in Wisconsin, has lifted the nation into an economic recovery.
As the engine that drives our climate, the oceans are the front line of the global climate challenge, absorbing half of the carbon dioxide we've pumped into the atmosphere and more excess heat from greenhouse gases than all the rain forests combined.
The names are switched, and the violence permitted against the minority in the South is at least more limited than it was, but they still superintend a system in which the same two peoples are very much locked in conflict — with a Wall Street economy as the engine that drives it, left too often alone as it routinely overheats and explodes.
A tremendous throbbing, as of the engine that makes the earth turn, filled the little room; he had begun to purr. . . .
I view financial security as fuel for the engine that provides life's experiences.
The development of a stronger Phoenix economy requires the involvement of local businesses as they are the engine that drives our city.
Other cadets worked in tandem, as if plugging a leaky dam, to keep the entire system working as the N.S.A. hackers attacked the engine that runs a crucial database as well as the e-mail server.
Entrepreneurs have been viewed as the engines that can move the economy forward, providing new businesses that add to entrepreneurial ecosystems in geographic regions (Grebel 2007; Grebel et al. 2003; Metcalfe 2004; Schumpeter 1934; Witt 1998).
