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Brief description LHU/A20NFT

Brief description LHU/A20NFT


The 2.0L Biopower engine from the Saab 9-5 (650) has been adapted for installation in the Saab 9-3 (440). In connection with this, EHPS (Electro-Hydraulic-Power-Steering) has been introduced, which has previously been used for the diesel variants. EHPS provides servo assistance, which is speed and control speed dependent.

The the petrol engine variant has the pump unit located separately from the steering gear in order to fit. The power-assisted steering gear is of the rack type and comprises a control valve and a slave cylinder in a common housing, equivalent to Saab's conventional power steering gears. The pump unit comprises a pump unit with oil reservoir, actuator, and a brushless electric motor. The oil reservoir is equipped with a filling hose to simplify post filling.

EHPS is connected to the P-bus and uses the steering wheel angle information from the steering wheel angle sensor in the CIM and the car speed from ABS/ESP. The power steering pump is activated as soon as the ECM reports that the engine has been started.