A power-steering system should assist the driver only when he is exerting force on the steering wheel. When the driver is not exerting force the system shouldn't provide any assist. The device that senses the force on the steering wheel is called the rotary valve. The key to the rotary valve is a torsion bar. The torsion bar is a thin rod of metal that twists when torque is applied to it. The top of the bar is connected to the steering wheel, and the bottom of the bar is connected to the pinion or worm gear, so the amount of torque in the torsion bar is equal to the amount of torque the driver is using to turn the wheels. The more torque the driver uses to turn the wheels, the more the bar twists.[5] Power steering assembly have rotary valve when you first start to turn the steering wheel as the bar twists, it rotates the inside of the spool valve relative to the outside. Since the inner part of the spool valve is also connected to the steering shaft, the amount of rotation between the inner and outer parts of the spool valve depends on how much torque the driver applies to the steering wheel. When the steering wheel is not being turned, both hydraulic lines provide the same amount of pressure to the steering gear. But if the spool valve is turned one way or the other, ports open up to provide high-pressure fluid to the appropriate line. The Power Steering Model that we have studied for advance car is a combination of both types hydraulic and electrical power steering .This combination will provide highly precise output with less effort so that the driver should make lots of effort to drive the vehicle or turn it. This model uses lots of sensors and Microprocessors (CPU) to control this whole unit from a centralize point.
A power-steering system should assist the driver only when he is exerting force on the steering wheel. When the driver is not exerting force the system shouldn't provide any assist. The device that senses the force on the steering wheel is called the rotary valve. The key to the rotary valve is a torsion bar. The torsion bar is a thin rod of metal that twists when torque is applied to it. The top of the bar is connected to the steering wheel, and the bottom of the bar is connected to the pinion or worm gear, so the amount of torque in the torsion bar is equal to the amount of torque the driver is using to turn the wheels. The more torque the driver uses to turn the wheels, the more the bar twists.[5] Power steering assembly have rotary valve when you first start to turn the steering wheel as the bar twists, it rotates the inside of the spool valve relative to the outside. Since the inner part of the spool valve is also connected to the steering shaft, the amount of rotation between the inner and outer parts of the spool valve depends on how much torque the driver applies to the steering wheel. When the steering wheel is not being turned, both hydraulic lines provide the same amount of pressure to the steering gear. But if the spool valve is turned one way or the other, ports open up to provide high-pressure fluid to the appropriate line. The Power Steering Model that we have studied for advance car is a combination of both types hydraulic and electrical power steering .This combination will provide highly precise output with less effort so that the driver should make lots of effort to drive the vehicle or turn it. This model uses lots of sensors and Microprocessors (CPU) to control this whole unit from a centralize point.
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