Wednesday 27 March 2019

COMPLETE INFORMATION ON HAZARD LIGHTS !!


Hazard lights are those lights which are indicative of a potential hazard that the vehicle flashing it may pose. When the lights are switched on, the four indicators (front and rear - right and left) begin to blink at the same time. This is an indication to all the vehicles passing it that there may be some problem with it. They are also called warning flashers, warning lights, flashers or 4-way flashers. These lights have to be independent of any other lighting or indication system provided in the car. 



If you have stopped your vehicle on the side of the road for some repair or any activity (esp highways) during night time, how will the traveler come to know if there is any other vehicle on the road? Hazard switch illuminates the front and rear lamps in ON-OFF condition to let the other person know that the vehicle is on the road and hence drive carefully.

When to use hazard lights:


1.)Getting pulled over. If law enforcement signals you to pull over, turning on your hazard lights can show the officer that you acknowledge their signal and are following the request. Slow down, turn on your hazard lights, and stop your car in a safe location.

2.)Changing a tire on the side of the road. Use your hazard lights when your vehicle becomes a potential hazard for other road users. If you’re parked on the side of the road changing a tire, it’s generally okay to have your hazards on.

3.)Your car has broken down and you’re waiting for a tow. Your car has become a temporary hazard and you’re waiting for assistance. Warn other drivers of your presence, especially if you are not able to move your car out of traffic.

When NOT to use hazard lights:


1.)Driving in bad weather. With your hazards on and rain or snow already blurring road visibility, other drivers may not be able to tell which lane you’re in or if you’re changing lanes. Turn on your headlights and taillights in inclement weather instead. If the weather is bad enough that you feel hazard lights are truly necessary, pull off the road and stop until conditions improve.

2.)Driving in heavy traffic. While your hazards can make you more visible, they can also make it challenging for other drivers to anticipate what you’re doing and where you’re headed, since turn signals are disabled when hazards are activated in some cars.

3.)Parking illegally. Parking illegally is never a good idea. But if you do park illegally…turning on your hazard lights doesn’t make it legal. Keep driving until you find an appropriate parking spot and won’t be blocking traffic.

4.)A turn signal will do the job. If you’re slowing down to exit the highway due to an unexpected problem, think twice before using your hazards. As we mentioned before, turn signals are generally disabled when your flashers are on. That can make it difficult for other drivers to know where you’re going and could result in a crash.

Hazard lights are an important safety measure that your car is equipped with. So take care and ensure that they are in proper working condition.

Sunday 10 March 2019

EXHAUST WRAP !! WHY THEY ARE DONE ?? EXPLAINED !

Traditionally, exhaust headers were wrapped only in race cars or bikes. Now that everyone wants to feel extra racey with their street car or they're trying to maintain a track-day car, many more cars and bikes are getting their headers wrapped.
Exhaust wraps are simple theory i.e. to keep the exhaust gases heated till they pass out of the exhaust system. This proposition works in several ways to improve the performance of the vehicle. By insulating the exhaust pipes including the headers, mid section and the end, the exhaust gases are not allowed to cool as they pass through the system. 


As the exhaust gases are hot, their density is less, thus allowing the gases to travel faster through the exhaust system. As the speed of the exhaust gases is higher, there is better scavenging of the combustion chamber. Due to the better scavenging effect, the fresh charge fills the combustion chamber more efficiently. At another level, as the heat front the exhaust gases is not being allowed to radiate out throughout the exhaust pipes all the areas in the vicinity of the exhaust pipes routing run cooler thereby promoting a cooler running engine.

Second benefit is a smoother running vehicle and mellowed sounding exhaust note.

Another benefit is in cars, where everything comes in under the hood. Which means the heat from the exhaust headers are radiated into the engine bay. The filter box provides excellent insulation from this too.

Installing wrap on your motorcycle exhaust or car headers is simple. Grab one of our recommended kits and start wrapping. In about an hour you’ll have an exhaust system that looks brand new.

Saturday 9 March 2019

WHY DISC BRAKES ARE BETTER THAN DRUM BRAKES ? REASONS EXPLAINED !!

Brakes are the most important safety feature of any automobile. There are two kinds of brakes which are generally used in case of passenger vehicle: disc brakes and drum brakes. 

With the advent of new technology, motorcycles are getting more powerful and faster. Gone are the days when people used to buy a bike to just commute from point A to B. Now, customers look for performance when buying a motorcycle. With the increase in power and speed, the brakes also needed an upgrade.So disc brakes are an update to drum brakes.In this article we will discuss how disc brakes are better than drum brakes.

Let us first discuss how disc brakes works:

When you pull the brake lever, the oil is pushed towards the calipers and in turn; it applies pressure on the pads which creates friction with the disc to slow or stop the motorcycle.This is demonstrated in animation below:



How disc brakes are better than drum brakes:

1.)Heat Dissipation: As the disc brake is located outside the wheel, it cools down easily as compared to drum brake. The drum brake is located inside the wheel, so chances of brakes getting heated are very high.


2.)Stopping Power: The disc brake offers efficient stopping power compared to drum brake. We can also increase the bite of the brakes by adding bigger pads or multiple pads. Having dual disc is also an option to increase the braking power.

3.)No Wheel Damage: In a drum brake system, shoes are connected to a spring which causes friction with the wheel. So, the friction might result in overheating inside the wheel and it could damage the wheel gradually. But there is no such problem with the disc brakes.

4.)Maintenance: During the maintenance of a disc brake, you only need to clean the disc and the pads with a sanding paper. But during a periodic maintenance of a drum brake, you need to remove the entire wheel. 


5.) Affordable Spares: Both the disc and the brake pads are not that expensive and it can be changed very caliper. But if something goes wrong with the drum brakes, there are chances of damage to the wheel. So a damaged wheel could be an expensive affair.

Although there are few disadvantages with disc brakes like wheel lockup,high initial cost and brake fluid maintenance but these disadvantages of disc brakes are negligible. Disc brakes are always better than drum brakes and can deliver excellent braking performance.


Most companies usually offer disc brakes at just the front-end on some of their smaller displacement offerings. This helps improves braking while also keeping the price of the motorcycle in check.

Friday 1 February 2019

WHY HEAT TREATMENT IS REQUIRED ? CHECK OUT THE ANSWER !!

Heat treatment is the process of heating (but never allowing the metal to reach the molten state) and cooling a metal in a series of specific operations which changes or restores its mechanical properties.




WHY HEAT TREATMENT IS REQUIRED?

Welding, cutting, or even grinding on metal produces heat, which in turn has an effect on the structure of the metal. These change in structures affect the properties of the material. Heat treatment makes the metal more useful by making it stronger and more resistant to impact, or alternatively, making it more malleable and ductile.



However, no heat-treating procedure can produce all of these characteristics in one operation; some properties are improved at the expense of others. For example, hardening a metal may make it brittle, or annealing it may make it too soft.


STAGES OF HEAT TREATMENT :

You accomplish heat treatment in three major stages:

• Stage l — Heat the metal slowly to ensure uniform temperature.
• Stage 2 — Soak (hold) the metal at a given temperature for a given time.
• Stage 3 — Cool the metal to room temperature.


VARIOUS TYPES OF HEAT TREATMENT PROCESSES :

All heat-treating processes are similar because they all involve the heating and cooling of metals. However, there are differences in the methods used, such as the heating temperatures, cooling rates, and quenching media necessary to achieve the desired properties.

The heat treatment of ferrous metals (metals with iron) usually consists of annealing, normalizing, hardening, and/or tempering. Most nonferrous metals can be annealed, but never tempered, normalized, or case hardened.


1.)ANNEALING: Anneal metals to relieve internal stresses, soften them, make them more ductile, and refine their grain structures. The process includes all three stages of heat treatment already covered (heat the metal to a specific temperature, hold it at a temperature for a set length of time, cool it to room temperature), but the cooling method will depend on the metal and the properties desired.


2.)NORMALIZING: The intent of normalizing is to remove internal stresses that may have been induced by heat treating, welding, casting, forging, forming, or machining. Uncontrolled stress leads to metal failure; therefore, you should normalize steel before hardening it to ensure maximum results. Normalizing applies to ferrous metals only, and it differs from annealing; the metal is heated to a higher temperature, but then it is removed from the furnace for air cooling.

3.)HARDENING: The purpose of hardening is not only to harden steel as the name implies, but also to increase its strength. However, there is a trade-off; while a hardening heat treatment does increase the hardness and strength of the steel, it also makes it less ductile, and brittleness increases as hardness increases. To remove some of the brittleness, you should temper the steel after hardening.



4.)TEMPERING: After hardening by either case or flame, steel is often harder than needed and too brittle for most practical uses, containing severe internal stresses that were set during the rapid cooling of the process. Following hardening, you need to temper the steel to relieve the internal stresses and reduce brittleness.

Tempering consists of:

• Heating the steel to a specific temperature (below its hardening temperature)
• Holding it at that temperature for the required length of time
• Cooling it, usually in still air.

The difference from other heat treatment process is in the temperatures used for tempering, which will affect the resultant strength, hardness, and ductility.

5.)QUENCHING: Quenching is a process of hardening a metal substance beyond its natural hardness level. In this process, a metal/alloy object is heated to a temperature till it becomes RED hot i.e. sub-boiling temperature and then is suddenly sunk into a fluid of room temperature or lesser eg, Water.

The main objective behind this process is to increase the hardness of the material. This takes place by making the micro grain structure homogenous and improving the strength of the metal. This process makes the metal brittle. The tensile strength of the material is reduced heavily.

Tuesday 29 January 2019

WHY GAPS BETWEEN RAILWAY TRACKS ? CHECK THE ANSWER HERE !!


In traditional railway construction, rails are laid down over sleepers, clamped to them and then fastened to one another by means of fishplates. These fishplates not only help the whole track structure to maintain its integrity but also ensure that a certain (small) distance between rails is kept. This is due to thermal expansion.



All metals expand when heated. If two railway tracks are laid together without any gap between them they will push against each other when they expand in the day time because of the heat of the sun, and when they cool down in the night they will contract and return to their original state pulling against each other.  This constant pushing and pulling against one another when they heat and expand in the day time and cool down and contract in the night will result in the weakening of the joints between the two tracks and after a few days the two tracks may also break free from one another. Such a situation will result in the derailment of the trains causing major accidents and loss of lives.



So, the railway engineers always leave a small gap between two rails to compensate for the expansion of the rails during the hot day time and contraction during cold nights.

Modern railways employ continuous soldered rails and track expansion devices at regular intervals (and usually at the start and end of bridges, tunnels, and other structures) to avoid the maintenance problems posed by rail thermal expansion and to increase rolling comfort.

Monday 28 January 2019

FACTORS AFFECTING EXHAUST SOUND OF AN ENGINE EXPLAINED !!!

You might have heard different exhaust note of motorbikes and cars. For example, the exhaust sound of the Royal Enfield Classic 350 is completely different from Kawasaki Ninja 300. In this article, we will discuss various factors that affect the exhaust sound of an engine.



But, before we discuss that, a brief primer on sound: It originates as vibrations that cause air-pressure disturbances that hit our eardrums. The frequency, or Hertz (Hz), of a sound wave—how many times the wave oscillates in a second—determines how our brain processes and interprets it as a distinct pitch. A higher frequency makes for a higher pitch, and vice versa. A car’s engine under load plays a range of frequencies, but its root note—the pitch its musical chord is built on—is defined by its so-called dominant frequency.


These sound-generating vibrations derive from the combustion in each cylinder and the corresponding pressure waves in the intake and exhaust systems. They are all keyed to the engine’s rotational speed; as revs rise and fall, the pitch goes up and down.

FOLLOWING FACTORS AFFECT THE EXHAUST SOUND OF AN ENGINE:


1.) Air induction-  In most cars, this is damped heavily. If you have a k+N universal one, you will hear the hiss. Carb engines made a much more delightful noise. Seen an Alfa or was it a Ferrari with triple carbs. Intake manifolds also play a part in the induction noise.



2.)Top Part of Engine- More parts means more music or noise - double overhead cams should make more interesting sounds. Belt driven cars are a little quiet. It all depends on tolerances and valve lifts. Pushrod engines generally sound harsh at high speeds. So, camshaft, valves and other parts of an engine which are located at the upper part of the engine also determines the sound of an engine.



3.)Bottom Part of Engine- It depends on bore, stroke and the number of cylinders. If an engine is having a larger stroke, we will get thump like sound that we get in Royal Enfield. If the number of cylinders in an engine is more than one it will produce better sound as compared to single cylinder engine.



4.)Exhaust- The exhaust construction is a big influence: which cylinders are combined into one pipe, separate exhausts per bank or combined or separate with a balance pipe, material.




5.)Turbo- It actually muffles the car, produces hiss sound when the turbo comes on.



Tuesday 15 January 2019

MG HECTOR !! 5 FACTS YOU MUST KNOW !!

MG Motor recently announced the name of its SUV for the Indian market. Called the MG Hector, the new SUV will be officially released in mid 2019. Prior to its launch, the carmaker has released a teaser video showing minor details about the vehicle, while testing in extreme climate conditions. Here are 5 interesting facts about the MG Hector SUV that you should know.



1. MG: A ‘NEW’ carmaker for India

Operational since 1924 (pre-Independence era), MG a.k.a Morris Garages was founded in the UK (95 years old) and is known for its classic sports cars and cabriolets. MG was acquired by China’s state-owned SAIC Motor Corporation (SAIC, formerly Shanghai Automotive Industry Corporation) in the late 2000s.



According to the British automaker, the name ‘Hector’ takes inspiration from a couple of sources, all with reference to Europe. First off, the Hawker Hector which served as a biplane in the British Royal Army back in the 1930s. Second, Prince Hector of Troy, the warrior who fought valiantly in the Trojan War.

2. Competitive pricing and rivals

MG is targeting 75 per cent localisation with the Hector at launch. It is expected to be priced between Rs 15 lakh to Rs 20 lakh, similar price range as the Jeep Compass. The MG Hector will also go up against the Tata Harrier, Hyundai Tucson and the Mahindra XUV500.


3. Will get both petrol and diesel engines at the time of launch

The MG Hector will be powered by the same Fiat 2.0-litre Multijet diesel engine as the Jeep Compass. There will also be a petrol engine on offer, but MG Motor is yet to reveal any details about it. We believe that it could be a 1.5-litre turbocharged petrol, as seen on the China-spec Baojun 530. While the is there no confirmation regarding the automatic diesel variant, the petrol-powered Hector is expected to get an automatic version in India.

4. More than 45 MG dealerships at the time of launch

At the time of Hector’s launch, MG will have around 45 dealerships up and running across the country and almost as many service centres. Moreover, MG Motor will also set up a brand-owned dealership in Gurugram for those who want a more in-depth understanding of the brand. The carmaker says all MG owners will be part of an exclusive club as well. The carmaker has already announced 4 dealerships for Punjab, in Chandigarh, Jalandhar, Ludhiana and Amritsar.

5. BIGGER THAN TATA HARRIER

Compared to its arch rival – Tata Harrier, the MG Hector is 57mm longer and 54mm taller. While the former measures 4598mm in length and 1706mm in height, the latter is 4655mm long and 1760mm tall. In terms of width, however, the Harrier takes a lead. While the Harrier is 1894mm wide, the Hector measures 1835mm in width.


The launch of the Hector has been confirmed to take place in Mid 2019, which could be in June 2019. MG will have 100 sales and service touchpoints in place by May 2019.

If you find this article helpful kindly share it with your friends and if you want to add something to it feel free to write in the comment box.

Thank You!