EPs

■EPS structure analysis

A power steering system that relies directly on the motor to provide auxiliary torque. As it does not use engine power, fuel saving is achieved compared to hydraulic type.
In addition, according to the auxiliary parts, the structure is roughly divided into 3 types: column shaft type, rack type and pinion type.
The opening was based on small displacement vehicles, and with the improvement of motors and controllers, they were gradually adopted by small and medium automobiles and even large automobiles.
Compared with ordinary hydraulic power steering, the estimated savings of 3 to 5% of fuel costs, so recently in Japan, Europe as the head, the world's automobile manufacturers have embarked on the steering system.
In the future, the large North American market will also be heavily used.

■EPS detailed

Column shaft EPS is the installation of the ECU or motor in the carriage, thus ensuring water repellency and not being affected by the heat of the engine.
However, the auxiliary mechanism is relatively close to the steering wheel, so the European cars which pay more attention to the steering or sound and impact safety structures are less used.
In addition, the motor installed on the side of the small gear and pinion steering system, although the use of motor more stringent conditions, but the feeling of steering and mute are very good.

■workpiece

EPS appearance inspection
Resin gears, various rotating shafts ~!

Resin gear to gear appearance
Shaft to dent
Universal joint - riveting status confirmation
Inspection of buried hole of universal joint

■Resin gear foreign body inspection

Detect white foreign matter on the resin gear.
The right is the processing image.
Use the area of the defect detection to determine.

■Shaft Dent test

Check the dent on the shaft.
A defect detection tool or line camera prior to proposal.

■A universal coupling Riveted status verification

Confirm the number and location of riveted parts.

■A universal coupling Hole inspection

The hole inspection is to check whether the inner processing of the blue ring is correct or not.
The processing state is reflected in white. Therefore, the test result can be obtained by measuring the white area.