1.
driving force; propulsive power (of engine, motor, etc.)
The mechanical force that drives or propels a machine, vehicle, or device forward. Used in engineering and automotive contexts.
エンジンの駆動力を最大にする。
Maximize the driving force of the engine.
電動モーターの駆動力は静粛で滑らかだ。
The driving force of an electric motor is quiet and smooth.
2.
driving force; motivating power (abstract)
The force, motivation, or factor that drives progress, change, or achievement in an abstract sense. Used figuratively in business, social, and personal contexts.
経済成長の駆動力となったのは技術革新だ。
Technological innovation was the driving force behind economic growth.
彼女の情熱がチームの駆動力になっている。
Her passion is the driving force for the team.
USAGE:
In sense 1, used in mechanical engineering and automotive contexts (四輪駆動力, 推進力). In sense 2, used metaphorically for what propels social change, business growth, or personal achievement. Sense 2 is the more common usage in everyday writing.