Tech Primer
Most modern cars include a steering system which employs some kind of power assist, typically hydraulic power steering or electric power steering (EPS) systems. With advances in technology, EPS systems are increasingly being deployed. Generally an EPS system is composed of a torque sensor, microprocessor, driver and motor. In an EPS system, when the driver makes a steering input, the torque sensor installed on the steering column converts the torque sensed into an electronic signal for the microprocessor. The microprocessor uses this signal to calculate the level of steering assistance which is required, and directs a motor coupled to the steering column or elsewhere within the steering system.
Both hydraulic and electric power assist systems require some power from the main engine, however, electric power steering consumes less power than its hydraulic counterparts. EPS systems also have the advantage of being able to control the torque assist based on other properties such as the vehicles speed or driving mode.
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