The Door Window Lifting Mechanism Engineering Essay

The gateway Window Lifting Mechanism Engineering EssayMechatronics is at the heart of this boom in vehicle design and functionality. Mechatronics locomotive engineering unites the principles of mechanical, electrical, electronics and computing to generate a simpler, more economical, efficient and reliable arrangement.Applications of Mechatronics in designing products and processes is hotheaded advances in automobiles the actual cars and components, as well as the equipment needed to build, diagnose and service them. Nowadays the mechatronic systems are reliable, accurate and film a very tall efficiency especially in automobiles with Electronic engine tempers, Anti-lock braking system and self parking system.Electronic manoeuvreled IC engines without starting motor and effortrless car systems are nether experiment with the evolution of modern mechatronics.Door window Lifting Mechanismhttp//auto.howstuffworks.com/ originator-window.htmIn the door window takeing mechanism a small motor is attached to a worm gear and many other spur gears to create a large gear reduction, to dress make haste and to give enough torque to lift the door window.This mechanism consists of a long linkage arm attached to bottom of window. When the motor turns the gear, that engages the teeth of long linkage arm to move the window up or down depends on motor direction.Animation of window lifting mechanism at work,with inset of motor and gear reductionRef Door LockDoor lock mechanism has to be very reliable because it is going to unlock the doors tens of thousands of times over the life of a car.http//static.howstuffworks.com/gif/ violence-lock-intro.jpgIn the power door lock system, the body comptroller decides to lock or unlock the door. The body controller is nothing but the computer in a car. It monitors for the place code entered on the door mounted touch pad and unlocks the door. It also monitors the radio frequency communicates, when it receives the correct digita l code from the radio transmitter in the key fob, it provides power to the actuator that locks or unlocks the door.Door lock mechanism is quite simple. It consists of a small electric motor that serves as a gear reduction by turning a series of spur gears. The last gear drives a rack and pinion gear set that is connected to the actuator rod. The rotational intercommunicate of the motor is converted to linear motion by the rack which is needed to move the lock.achttp//static.howstuffworks.com/gif/power-lock-actuator2.jpgInside the power-door-lock actuatorA centrifugal switch is connected to the gear and engaged by the motor. When the motor spins the gear, the clutch swings out and locks the small metal gear to the larger plastic gear, allowing the motor to drive the door latch.http//static.howstuffworks.com/gif/power-lock-gears.jpgCentrifugal clutch on the drive gearThe body controller also monitors a lot of little things like, it ensures the interior lights stay on until the car is started, it beeps out ifthe headlights are left on and also when the keys are left in the ignition condition.In advanced mechatronics, the switches are connected to one of the many electronic modules in the car. Some cars have one in the drivers door electronic module, as well as in the body controller. If the driver presses his window switch, the door module closes a put across that provides power to the window motor. If the driver presses the switch to adjust the passenger-side window, the drivers door module sends a packet of data onto the communication bus of the car. This packet tells the body controller to energize one of the passenger-side window motor.Wind shield wiper armsIn windshield wiper mechanism a worm gear is used on the outfit of a small electric motor since a lot of force is required to accelerate the wiper blades back and forth quickly.An electronic circuit intimate the motor/gear assembly senses when the wipers are in their down position. The circuit maintai ns power to the wipers until they are parked at the bottom of the windshield.The new type of wiper system introduced to control the wipes automatically called the Rain sensor system. This system uses the optical sensors to detect the moisture. The sensor projects infrared light into the windshield at a 45-degree angle. If the tripe is dry, most of this light is reflected back into the sensor by the front of the windshield. If the glass is wet, the less light makes it back into the sensor.The electronics and software in the sensor turn on the wipers when the amount of light reflected onto the sensor decreases to a preset level. The system adjusts the speed as often as necessary to match with the rate of moisture accumulation.Anti-Lock brake system Systemhttp//static.howstuffworks.com/gif/anti-lock-brake1.jpgAnti lock braking system are used to keep the wheels from skidding while slow down and it benefits in two ways able to stem fasterand also able to steer while it stops.The cont roller monitors the speed sensors and looking for decelerations in the wheel that are out of the ordinary. It will experience a rapid deceleration right before wheel locks up.The ABS controller knows such a rapid decelerations is not possible so it reduces the pressure to that brake until it sees an acceleration, indeed it increases the pressure until it sees the deceleration again. This process is done very fast before the tyre can actually change speed. The result is that the tire slows down at the same rate as the car giving the system maximum braking power.Engine Control Unitcomputer from a ford rangerThe engine control unit (ECU) is the most powerful computer on most cars. The ECU uses closed-loop control, a control scheme that monitors all the outputs of a system and it controls the inputs to a system, to reduce the emissions and increases the fuel economy of the engine.Fig Elements of Engine control UnitECU gathering the data from sevarl different sensors like speed, tempera ture, crank shaft position and oxygen in exhaust etc. With this data, it performs millions of calculations in each second, including looking up values in tables, calculating the results of long equations to decide on the best spark quantify and determining how long the fuel injection is open. The ECU does all of this to ensure the lowest emissions and best mileage.A modern ECU might contain a 32-bit, 40-MHz processor, 16 (MB) of retentiveness in an ECU.Controlling the Cruise Control SystemThe cruise control system controls the speed by adjusting the throttle position an electronic actuator. The throttle valve controls the power and speed of the engine by limiting air/fuel to the engine.The brain of a cruise control system is a small computer. It connects to the throttle control, as well as several sensors.http//static.howstuffworks.com/gif/cruise-control-diagram.gifA cruise control system accelerates the very fast to the desired speed without overshooting, and then maintains that speed with little dispute at independent of car weight, or how steep the hill you drive up. Controlling the speed of a car is a classic application of control system theory. The cruise control system controls the speed of the car by adjusting the throttle position, by feedback signal from speed and throttle position sensor. Also it necessarily to monitor the controls so it can tell what the desired speed is and when to disengage.Adaptive Cruise ControlAdaptive cruise control can automatically control the car speed to maintain a safe following distance. This technique uses forward-looking radar, installed behind the grill of a vehicle, to detect the speed and distance of the vehicle ahead of it.Adaptive cruise control is same as to conventional cruise control in that it maintains the vehicles pre-set speed, but also it need adjust speed in order to maintain a proper distance between vehicles in the same lane. This is achieved through a radar headway sensor, digital signal processor and longitudinal controller. If the lead vehicle slows down, or if another object is detected, the system sends a signal to the engine or braking system to decelerate. Then, when the road is clear, the system will re-accelerate the vehicle back to the set speed.Self-parking CarsSome cars have put in rear view cameras, sensors and even computer generated 360-degree views of the car, people still draw away to scrape, ding and dent their way into parking spaces.Self-parking carThe system uses sensors all around the car to guide it into a parallel parking space. The driver has to regain a parking space, position the car next to it, and use the in-cabin navigation screen to tell the car where it should go.Automated Guided Vehicle SystemsFROG ( kick Ranging On Grid) technology is used in Automated Guided Vehicle Systems, which are driverless cars.FROGFROG vehicles are equipped with a computer that contains a map of the area in which the vehicle operates. The vehicle starts from a know n location and uses the map to determine the route to its destination. It counts wheel revolutions to figure out how distant it has travelled (sort of how you might count steps to figure out how far youve walked). To check itself, the vehicle also uses various calibration points (electronic landmarks for the vehicle) in the area it works. scrag Position SensorThrottle ValveVacuum ActuatorCruise Control ComputerVehicle Speed signalBrake Pedal SwitchSteering drift ControlsClutch Pedal Switchhttp//static.howstuffworks.com/gif/cruise-control-diagram.gif