Sunday, July 8, 2018

Let's make cars more lively, are you listening the Car Makers?


What is luxury?
The first definition, which Google suggests is a state of great comfort or elegance, especially when involving great expense. However, latter part of the definition may not be always right because, for an instance, an access to greenery or fresh air is luxury for me while for the people living in forests or mountains it’s just part of life. Or in another sense, luxury can be defined to achieve something you craved for. In addition, in this sense, I want to have one luxurious feature in my car, which I don’t find in any of the available cars in India.
So, what’s this feature which I call luxurious?
Through out the year when I am driving car in NCR, there is at least 30% times when I wish a special feature in my car. This feature is something, which should allow fresh air inside the cabin.
You moron! Don’t you have AC in your car? It has fresh mode. And even if you don’t have AC, who stops you pulling the window glass down.
Hahaha, I know and I have AC in my car and that’s also FATC. But point is I don’t want processed air which has come up through the evaporator core, picking up a stale smell from the evaporator and always at higher temperature than that of outside air. I want it direct.

What nonsense are you talking? Again, who is stopping you from pulling the window glass down?
Hahaha. It’s direct but sideways. I want direct from the front. I want to have a feel of soft fresh breeze over my face, over my body like the one gets while riding the bike at lower speed.
But there are sunroof in cars to have a feel of bike and more?
I know but I don’t think you can enjoy that feel while driving a car even though it has SUNrooof. Sunroof is a luxury. Somebody might have thought, wished and got the car with sunroof. Why not another luxury feature!

Okay... what is the feature?
Hnm, So now you are ready to understand this feature. OK. I’ll explain. But before I go to the feature details, let me explain it’s utility first.
To understand the utility of the concept, 3 cities of India have been considered. The data for ambient temperature pattern as shown in the graphs has been taken from  www.worldweatheronline.com. As per the yearly temperature data of Bangalore, during most of the time of the year temperature is between 20 deg C to 30 deg C. This temperature range is called comfort range. It means, for the cities like Bangalore, if my car has a feature which allows fresh air from the front, I don't need to on the AC most of the time as ambient temperature falls in comfort range. The thick blue arrow shows the time period when comfort range is available for 24 hours / day and it is named as 'Blue comfort range' while thick purple arrow represents the time period of the year when comfort range is available for certain hours a day and it is named as 'Purple comfort range'. Therefore, it is clear that fresh air feature, which will be explained in the consequent paragraph, is very useful for the cities like Bangalore.
for the cities like New Delhi, where ambient temperature is higher, also witness comfort range temperature during certain period every year. As shown in Temperature graph of New Delhi, from October to April Purple comfort range is available. Therefore, fresh air feature is useful for the cities like Delhi also.
 The another city considered for ambient temperature analysis for fresh air feature is Pune. As it is clear from graph that Blue comfort range is available from June to January and Purple comfort range is available from January to June. In contrast to the Bangalore temperature, Pune witnesses Blue comfort range for longer duration each year. It means cities like Pune will be most beneficial by new luxurious feature.
So, now I think the utility of new fresh air feature is clear. Now, the details of the new fresh air feature can be summarised as
1. The feature will be available just at the top edge of front windshield where it meets the roof edge.
2. This feature will be applicable for driver as well as co-driver side.
3. This feature has filter provision which can be cleaned on time to time basis.
4. This feature will have adjusted openings which allow required fresh air flow directly to the driver / co-driver.
5. This feature will incorporates design methodology which helps it to give soft breeze in cabin at any vehicle speed.
6. The feature design should ensure the noise due to air  entry is within acceptable ( < 70 dBA)  limit.
7. The feature does not foul with wiper.
8. The feature design should ensure no water entry inside cabin in rainy season.



The above image shows the location of fresh air feature in side view of a car. The feature location can be easily accessed by hand for it's operation. (On/Off/speed variation)

Why this feature is desirable provided fresh air can be have in car through 1. HVAC 2. Side Window ?

The first answer is- FEEL while another reasons are
1. HVAC air in fresh mode is little bit hot because there is always some hot air leakage in HVAC.
2. HVAC air odour does not feel good.
3. Driving with open side glass is noisy and unsafe.


1 comment:

  1. Good article Baba! The point of worry is the quality of air in city such as Delhi. Are we in a state to provide such feature?

    ReplyDelete

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