Clemson Vehicular Electronics Laboratory Electric PowerAssisted Steering

16 Июн 2014 | Author: | Комментарии к записи Clemson Vehicular Electronics Laboratory Electric PowerAssisted Steering отключены
August Electric Vehicle

Electronic Power Steering

Description

Power steering supplement the torque that the applies to the steering wheel. power steering systems are systems, but electric power (EPS) is becoming much common. EPS eliminates many HPS such as the pump, hoses, drive belt, and pulley.


For reason, electric steering tend to be smaller and lighter hydraulic systems.

EPS systems variable power assist, provides more assistance as the of a vehicle decreases and less at higher speeds. They do not any significant power to operate no steering assistance is required. For reason, they are more efficient than hydraulic

How the system works:

The EPS electronic unit (ECU) calculates the power needed based on the being applied to the steering by the driver, the steering wheel and the vehicle’s speed.

The EPS motor a steering gear with an force that reduces the required from the driver.

are four forms of EPS, on the position of the assist motor. are the column assist type the pinion assist type the direct drive type and the rack assist type The C-EPS type has a power unit, torque sensor, and all connected to the steering column. In the system, the power assist is connected to the steering gear’s shaft. This type of works well in small

The D-EPS system has low inertia and because the steering gear and unit are a single unit. The type has the assist unit to the steering gear. R-EPS can be used on mid- to full-sized due to their relatively low inertia high reduction gear

August Electric Vehicle

Unlike a hydraulic power system that continuously a hydraulic pump, the efficiency of an EPS system is that it powers the EPS only when necessary. results in reduced vehicle consumption compared to the same with an HPS system. These can be tuned by simply modifying the controlling the ECU. This a unique and cost effective to adjust the steering feel to the automotive model class. An advantage of EPS is its ability to compensate for forces such as a flat

It is also capable of steering in maneuvers in conjunction with the stability control.

In current-day there is always a mechanical between the steering wheel and the gear. For safety reasons, it is that a failure in the electronics result in a situation where the prevents the driver from the vehicle. EPS systems incorporate mechanisms that disconnect from the motor in the event a problem with the ECU is detected.

The step in electronic steering is to the remaining mechanical components and to to pure electronic steering, is referred to as steer-by-wire (SBW). functions by transmitting digital to one or more remote electric instead of a rack and pinion which in-turn steers the The 2014 Infinity Q50 is the first vehicle to implement SBW. there is normally no direct linkage, the Q50 has a mechanical back-up. a failure, a clutch engages to the driver’s mechanical control.

As with throttle control it is likely that SBW will the standard once the electronic prove to be safer and more than the current hybrid

Updates or corrections to this web should be emailed to CVEL-L@clemson.edu .

August Electric Vehicle
August Electric Vehicle

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