AUTOMOTIVE VENTILATION FOR

PARKED CARS

INTRODUCTION The temperature inside car cabin increases easily up to 40C Higher cabin temperature can cause color fading Conduction, convection and radiation are main causes This prototype mainly focuses on regulating the internal

temperature of the car.

Sunrays increasing the cabin temperature.

LITERATURE SURVEY

1. Toyota Prius (3rd GEN, 2010) It includes solar panel It uses energy to operate air conditioning system It operates ventilation system of car

Toyota Prius Optional Solar Panel.

2.BMW 7series

BMW 7series has parked car ventilation It blows air into the passenger compartment to reduce interior

temperatures The system is operated via iDrive. It remains switched on for 30 minutes.

3. BMW e39 (5 series)

The parked car ventilation feature of the E38 (7 series) system is retained on the E39 IHKA system.

The signal to activate the venting function is generated by the BC function of the IKE.

The signal is passed over the K-Bus to the IHKA for fan and flap activation.

PROTOTYPE OF CIRCUIT

CIRCUIT DIAGRAM

WORKING

Op Amp, 741 as comparator, compares inside car temperature with ambient.

Relay energies to operate blower if inside car temp. is higher than ambient.

IC 555 timer operates blower with preset interruption

Astable multivibrator restricts prolonged operation of blower when car is parked for long time

It also saves battery power

PROTOTYPE MODEL

IC BOARD OF PROTOTYPE

COMPONENTS USED IN CIRCUIT1. Operational amplifier (op-amp)

An operational amplifier (op-amp) is a DC-coupled high-gain voltage amplifier

 It has a differential input and, normally, a single-ended output Particular circuit can be form by using an op-amp with some

external components with little dependence on temperature changes

Circuit diagram symbol for an op-amp

V+: non-inverting input

V−: inverting input

Vout: output

VS+: positive power supply

VS−: negative power supply

 

2. IC 555 timer

The 555 timer IC is an integrated circuit  used as a timer, pulse generation, and oscillator.

The 555 can be used to provide time delays, and as a flip-flop element also

the standard 555 package includes 25 transistors, 2 diodes and 15 resistors 

They are installed on a silicon chip in an 8-pin mini dual-in-line package.

3. Relay

A relay is an electrically operated switch that uses an electromagnet to mechanically operate a switch.

Relays are used where it is necessary to control a circuit by a low-power signal,

They are used where several isolated circuits are to be controlled by one signal.

It consists of a coil of wire wrapped around a soft iron core, an iron yoke, a movable iron armature, and one or more sets of contacts.

CONCLUSION

The new design aimed at regulating the inside car cabin temperature

It runs blower, exhaust fan and digital controlled electronic circuit unit except that ignition is off.

It has dual timer for running the circuit at regular intervals It keeps the blower working for particular interval of time. Thus it has helped to keep air circulating in the regular intervals It also help in saving the battery power. The circuit design is much cheaper than microcontroller circuit

FUTURE SCOPE1. 42 V TECHNOLOGY

The circuit prototype design can be used effectively with the 42V volt technology.

The problems of power deficiency can be achieved by this technology.

It also enhance the use of air conditioning system

2. SOLAR PANELS

The solar power generation can be used to fulfill the requirement. It will convert sun energy to charge the battery in regular

intervals. This will help to run the circuit effectively. The circuit cost is cheaper than any other cooling equipment’s. It can cope up cost of solar panels

REFRENCES Toyota Prius Hybrid Synergy Drive

http://www.toyota.com.au/hybrid-synergy-drive/hybrid-technology/how-hybridworks?WT.ac=HSD_HP_Banner_how-hybrid-works_S_FindoutMore at 10:45 pm on 5/8/2014

BMW 7 series

http://www.slideshare.net/fajarisnanto/60087943bmwe39integratedautomaticheatingandairconditioning at 3.49pm on 28/10/2014

BMW e39 (5 series)

http://www.m-sedan.com/parked_car_ventilation-475.html at 3.50 pm on 28/10/2014

Part list

http://en.wikipedia.org at 4.04pm on 28/10/2014