หมวดวิศวกรรม/เทคโนโลยียานยนต์ => ระบบบังคับเลี้ยว => ห้องเครื่องล่างยานยนต์ => เครื่องล่าง/ส่งกำลัง/ไฟฟ้ายานยนต์ => ระบบพวงมาลัยไฟฟ้า (EPS) => ข้อความที่เริ่มโดย: Auto Man ที่ 11 มีนาคม 2559, 14:12:52
-
Modifying Electric Power Steering
ตรงนี้มีภาพ! แต่ท่านจะมองไม่เห็น , ท่านต้อง สมัครสมาชิก หรือ ลงชื่อเข้าระบบ
(http://upic.me/show/58061412)
More and more cars are now being fitted with fully electric power steering. In these systems, hoses, pumps and reservoirs are dispensed with – instead, an electric motor attached to the steering column does all the work. The advantages to the manufacturer include lower servicing and assembly costs, and to the consumer, less likelihood of failure through power steering fluid leaks. Fuel consumption is also improved.
But there’s another advantage to the modifier, one which so far has been completely overlooked. Because it’s an electronically-controlled system, it’s easy to alter the characteristics of electric power steering to suit individual preferences. Specifically, you can alter the steering weight to radically improve steering feel and high speed stability.
And you want the good news? You can give your electric power steer car user–adjustable control over the steering assistance for under ten bucks.
The modification covered in this story was carried out on a Toyota. However, we’d expect that very similar changes would be possible on any car with electric power steering that uses a torque-based measuring system to determine the amount of electric assist.
Electric Power Steering Systems
It’s now over four years since we covered the basics of electric power steering (see Electric Power Steering) but what do most electric power steering systems look like today? Well, some are simpler than covered in that story.
Typically, an electric power steering system consists of:
- a powerful electric motor geared to the steering shaft
- torque sensor(s) that detect how much effort is being put into the steering
- an electric power steering Electronic Control Unit (ECU)
- a road speed input to the ECU
The ECU looks at the steering torque and steering direction being applied by the driver, and at the road speed, and directs the electric motor to provide the required amount of assistance in the correct direction.
ที่มา http://www.autospeed.com/cms/article.html?&A=111532