Important: Use custom search function to get better results from our thousands of pages

Use " " for compulsory search eg:"electronics seminar" , use -" " for filter something eg: "electronics seminar" -"/tag/" (used for exclude results from tag pages)


Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
PNEUMATIC AUTO GEAR CHANGER A PROJECT REPORT
#1

PNEUMATIC AUTO GEAR CHANGER A PROJECT REPORT



.doc   1PNEUMATIC AUTO.doc (Size: 524 KB / Downloads: 277)

ABSTRACT

There are disclosed an automatic gear change control apparatus for an automobile and a method of controlling such apparatus. A rotational output of an internal combustion engine is connected to drive wheels of the automobile and a load device.
When a gear shifting-up of an automatic transmission is to be effected, the load applied by the load device is increased, or the load is connected to an output rotation shaft of the engine via a selectively-connecting device, thereby reducing the rotational speed of the output rotation shaft of the engine to a required level.
In this project, the push button is used to activate/deactivate the solenoid valve. The switch is ‘ON’ at the time of gear changing; the solenoid valve is activated, so that the compressed goes to the pneumatic cylinder. Then the compressed air passes through the tube, and then pushes the pneumatic cylinder, so that the gear is changed from one speed to another speed with the help of gear box arrangement.

INTRODUCTION

A method of controlling a gear change of an automobile, said automobile comprising an internal combustion engine; an automatic transmission connected to an output rotation shaft of said engine so as to transmit the rotational output of said engine to drive wheels of said automobile through any selected one of a plurality of gear ratios; a load device selectively connectable to said output rotation shaft of said engine via selectively-connecting means; and means for generating a gear change control signal for selecting one of said gear ratios of said automatic transmission in accordance with one of operational conditions of said automobile and said engine said method comprising the steps of controlling said selectively-connecting means when said gear change signal-generating means generates the control signal for shifting up the gear in said automatic transmission, in such a manner that said selectively-connecting means connects said load device to said output rotation shaft of said engine.
An automatic gear change control apparatus for an automobile, said automobile comprising an internal combustion engine; an automatic transmission connected to an output rotation shaft of said engine so as to transmit the rotational output of said engine to drive wheels of said automobile through any selected one of a plurality of gear ratios.

Advantages of hydraulics

1.Liquid (as a gas is also a 'fluid') does not absorb any of the supplied energy.
2.Capable of moving much higher loads and providing much higher forces due to the incompressibility.
The hydraulic working fluid is basically incompressible, leading to a minimum of spring action. When hydraulic fluid flow is stopped, the slightest motion of the load releases the pressure on the load; there is no need to "bleed off" pressurized air to release the pressure on the load.
Pneumatic logic systems (sometimes called air logic control) are often used to control industrial processes, consisting of primary logic units such as:
And Units
Or Units
'Relay or Booster' Units
Latching Units
'Timer' Units
Sorteberg relay
Fluidics amplifiers with no moving parts other than the air itself
Pneumatic logic is a reliable and functional control method for industrial processes. In recent years, these systems have largely been replaced by electrical control systems, due to the smaller size and lower cost of electrical components. Pneumatic devices are still used in processes where compressed air is the only energy source available or upgrade cost, safety, and other considerations outweigh the advantage of modern digital control.

INTRODUCTION TO AUTOMATIC GEAR CHANGERS

An automatic transmission (also called automatic gearbox, or "Straight shift"') is one type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually. Most automatic transmissions have a defined set of gear ranges, often with a parking pawl feature that locks the output shaft of the transmission.
Similar but larger devices are also used for heavy-duty commercial and industrial vehicles and equipment. Some machines with limited speed ranges or fixed engine speeds, such as some forklifts and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels.
Besides automatics, there are also other types of automated transmissions such as continuous variable transmissions (CVTs) and semi-automatic transmissions, that free the driver from having to shift gears manually, by using the transmission's computer to change gear, if for example the driver were redlining the engine. Despite superficial similarity to other transmissions, automatic transmissions differ significantly in internal operation and driver's feel from semi-automatics and CVTs. An automatic uses a torque converterinstead of clutch to manage the connection between the transmission gearing and the engine. In contrast, a CVT uses a belt or other torque transmission schema to allow an "infinite" number of gear ratios instead of a fixed number of gear ratios. A semi-automatic retains a clutch like a manual transmission, but controls the clutch throughelectrohydraulic means.

Park (P)

This selection mechanically locks the output shaft of transmission, restricting the vehicle from moving in any direction. A parking pawl prevents the transmission from rotating, and therefore the vehicle from moving, although the vehicle's non-driven roadwheels may still rotate freely. For this reason, it is recommended to use the hand brake (or parking brake) because this actually locks (in most cases) the rear wheels and prevents them from moving. This also increases the life of the transmission and the park pin mechanism, because parking on an incline with the transmission in park without the parking brake engaged will cause undue stress on the parking pin. An efficiently adjusted hand brake should also prevent the car from moving if a worn selector accidentally drops into reverse gear during early morning fast-idle engine warm-ups[citation needed]. It should be noted that locking the transmission output shaft using park does not positively lock the driving wheels. If one driving wheel has little vertical load it will tend to slip, and will rotate in the opposite direction to the more heavily loaded non-slipping wheel. Only a (properly adjusted) parking brake can be relied upon to positively lock both of the parking-braked wheels. (This is not the case with certain 1950's Chrysler products that carried their parking brake on the transmission tailshaft, a defect compounded by the provision of a bumper jack). It is typical of front-wheel-drive vehicles for the parking brake to be on the rear (non-driving) wheels, so use of both the parking brake and the transmission park lock provides the greatest security against unintended movement on slopes.

Reverse ®

This engages reverse gear within the transmission, permitting the vehicle to be driven backwards. In order for the driver to select reverse in modern transmissions, they must come to a complete stop, push the shift lock button in (or pull the shift lever forward in the case of a column shifter) and select reverse. Not coming to a complete stop can cause severe damage to the transmission[citation needed]. Many modern automatic transmissions have a safety mechanism in place, which does to some extent prevent (but does not completely avoid) inadvertently putting the car in reverse when the vehicle is moving forwards. This mechanism usually consists of a solenoid-controlled physical barrier on either side of the Reverse position, which is electronically engaged by a switch on the brake pedal. Therefore, the brake pedal needs to be depressed in order to allow the selection of reverse. Some electronic transmissions prevent or delay engagement of reverse gear altogether while the car is moving.
Reply
#2
Pneumatic gear shifter ppt and repor
Reply
#3

OPERATING PRINCIPLE:

Here we have two pneumatic cylinder mechanisms which are arranged on either side of the footrest of the vehicle to apply the gear. The pneumatic cylinder is attached to the end of the flat pedal. The rest of the plate has a pivot in the center. The cylinders operate with the help of the power supply and are controlled by the control unit. One of the cylinders is used to apply the gear and another to reduce the gears. The gears are applied to the vehicle depending on the speed of the vehicle. The speed sensors are placed near the wheel, the sensor detects the signal and gives the output signal to the control unit. For this purpose, we are using a belt motor with a U-slot sensor in such a way that the speed can be varied through the belt motor. Depending on the signal, the clutch and gears will change automatically with the help of the control unit. When the speed of the vehicle automatically increases the clutch and the change of speeds in the vehicles. The layout is clearly shown in the diagram below.

Two-wheel automatic gear changer pneumatic model
[Image: pneumatic-gear-change.jpg]

Reply

Marked Categories : mechanical students projects report on gear pdf, lecturer survey for pneumatic gear changer, pneumatic gear shifting, auto pneumatic gear shifter introduction, mechanical engineering project report on gear shaft, sorteberg relay schema, auto pneumatic gear shifter, automatic pneumatic gear changer, automatic gear changer project pdf, automatic gear changer project website, automatic pneumatic gear changer function, pneumatic button type gear changing system project report, pneumatic auto gear changer a project report pneumatic auto gear changer a project report, pneumatic quick gear changer project report, pneumatic auto gear changer a project report,

[-]
Quick Reply
Message
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  COST EFFECTIVENESS OF MINERAL WOOL INSULATION Vs PERLITE INSULATION full report project report tiger 2 140,950,716 18-01-2018, 11:53 AM
Last Post: dhanabhagya
  Electric Locomotive Traction full report seminar tips 1 1,636 20-09-2017, 11:06 AM
Last Post: jaseela123
  pneumatic motor seminar ideas 1 2,717 14-09-2017, 01:22 PM
Last Post: jaseela123
  MINI PROJECT REPORT FABRICATION OF AUTOMATIC GUIDED VEHICLE seminar post 1 475 08-09-2017, 04:54 PM
Last Post: jaseela123
  A Project Report On HYDRAULIC RAM PUMP study tips 1 3,568 07-09-2017, 10:26 AM
Last Post: jaseela123
  DYNAMIC ANALYSIS OF HELICAL GEAR BY PHOTOELASTICITY PPT project girl 1 955 06-09-2017, 01:35 PM
Last Post: jaseela123
  Robotic project Titles study tips 1 868 02-09-2017, 12:36 PM
Last Post: jaseela123
  SINGLE MINUTE EXCHANGE OF DIE REPORT study tips 1 1,231 02-09-2017, 11:49 AM
Last Post: jaseela123
  the project involved the study of corrosion in gas collecting main pipe in coke plant subine 1 158 31-08-2017, 04:46 PM
Last Post: jaseela123
  PROJECT REPORT ON FORD FIRE ENGINE summer project pal 1 3,606,156 31-08-2017, 11:10 AM
Last Post: jaseela123
This Page May Contain What is PNEUMATIC AUTO GEAR CHANGER A PROJECT REPORT And Latest Information/News About PNEUMATIC AUTO GEAR CHANGER A PROJECT REPORT,If Not ...Use Search to get more info about PNEUMATIC AUTO GEAR CHANGER A PROJECT REPORT Or Ask Here

Options: