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Tech Tips
8 bit or 16 bit microprocessor?

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Ever got the feeling you have compromised on something with an 8-bit microprocessor under your hood? Not really! Read on to understand what this means to you as a Hyundai owner..

What is the function of a Microprocessor under your car's hood?

New generation cars have various sensors that monitor engine performance. These include the Knock sensor, Vehicle speed sensor and the Oxygen sensor, among others. These sensors control the input parameters to the engine through 'actuators' like the fuel injector and the idle speed actuator through an ECM or the Engine Management System. The microprocessor is a part of this ECM and controls the speed at which the data is carried from the sensors to the actuators. The process speed is normally in milliseconds.

What is the difference between an 8 bit and a 16 bit microprocessor?

The difference is faster processing. A 32 bit microprocessor processes data faster than a 16 bit which processes faster than a 8 bit. Normally, the choice of the microprocessor depends on the volume of data to be processed, which in turn depends on the number of sensors used. To draw an analogy, it is like using an advanced Pentium 4 PC for your large graphic applications at work, while a simple Pentium II can fit almost your entire home computing requirements.

What difference does it make to me as a driver?

Very little. Most of the cars sold in India today have about 8 to 9 key sensors, which control about 4 to 5 actuators and a 8 bit microprocessor is more than adequate to handle this volume of data efficiently. In terms of speed of processing, a couple of milliseconds hardly make any difference to the quality of the drive or to the performance of the engine, given the above specifications.

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Steer while you brake with ABS

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The most advanced braking system, the Anti-lock Braking System or the ABS is a sure answer to every driver's search for the ultimate comfort and ease in braking even at high speeds. ABS is designed to help the driver to remain in control of the vehicle, on difficult and slippery terrains.

ABS Complements Hyundai

Hyundai Motor India has been the driving force in achieving technological breakthroughs in the automotive industry. The safety aspect is just one of many. The Anti-lock Braking System, dual side impact bars, collapsible steering, anti-roll bars, crumple zones, cross bar under the dashboard and reinforced pillars, give every Hyundai a rock solid feel. So, go ahead and take your Hyundai for a spin. The city roads have never been safer.

  • The ABS - what's within...
  • Speed sensors - The Anti-lock Braking System needs precise information to function. It needs to know when a wheel is about to lock up. The speed sensors located in the wheel or sometime in the differential, provide this information by determining wheel lock up during braking. A series of hydraulic valves limit the braking on that wheel.
  • Valves - An ABS controlled brake line consists of a valve. Each valve adopts three positions to enable better braking.
  • Position 1: The valve is open and the tyre from the master cylinder is passed through to the brake.
  • Position 2: The valve blocks the line isolating the brake from the master cylinder, thus preventing any further rise in pressure.
  • Position 3: The valve releases some of the pressure from the brake.
  • Pump - The valve releases pressure from the brakes and the pump puts that back. When the valve reduces the pressure in a line, the pump is there to get the pressure back up.
  • Controller - The Controller is the brain behind the ABS. Before the wheel locks up it experiences rapid deceleration. The ABS controller immediately senses that such a rapid deceleration is abnormal and reduces the pressure on that wheel until it accelerates again. It then increases the pressure till it senses the deceleration again. This procedure is repeated very quickly till the speed has reduced significantly. The result is that the tyre slows down at the same speed as the car. Which in turn stops the car from skidding giving tremendous stopping power.
  • Secure children in the rear seat in approved car seats. Use booster seats for older children.
  • When restraining children in a car that has been parked in the heat, check to make sure that seating surfaces and equipment (car seat and seat belt buckles) are not overly hot.
  • Kids can fall asleep when they have something soft to lay their heads on. So pop in a couple of pillows.
  • If your car has been parked outside on a hot day, make sure the car seat and seat belts are not too hot before buckling your children in the car.
  • Carry plenty of water or other fluids when travelling with children to prevent them from dehydration.

ABS - a child's play

Steer as you brake, brake as you steer! Using the ABS is like a child's play. Rest your foot on the brake pedal but do not relax. Apply steady and constant pressure on the pedal. Never remove your foot off the brake pedal or pump the brake.

ABS - makes you listen and feel

Anti-lock Braking has a distinctive noise and feel. So if you find your brakes sounding or feeling different, relax. A groaning noise, a rapid pulsing of the brake pedal, a periodic dropping of the brake pedal, a hard brake pedal and a light that turns on to say low traction, are part and parcel of the braking system.

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Performance Enhancement Fuels

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Premium, Speed, these are some of the latest buzz words that car owners have been hearing about. Some vouch that they improve performance and fuel efficiency while others feel that they do not see any change. The attendant at the petrol pump recommends it strongly and you are perhaps too confused to make up your mind. In this edition, we bring you the facts about the new ‘PEFs’.

PEFs or Performance Enhancement Fuels are the new food for the vehicles on the roads. These fuels contain advanced additive systems that clean up intake and fuel systems, and keeps them operating at peak performance and efficiency as the fuel gets used by your car. It also provides one-tank cleanup of port fuel injectors.

  • The benefits:
  • Maximising power output : With its advanced deposit control additive system, this fuel cleans fuel injectors, carburetors, additive system, fuel injectors, intake ports, and valves to restore maximum power output. They also help keep new engines clean to maintain engine power output.
  • Better acceleration : PEFs remove deposits that can hurt acceleration performance. They have unparalleled 'intake valve cleanup and keep clean' performance. With cleaner valves, better acceleration is achieved.
  • Better driveability and smoothness : Clean fuel injectors and intake valves ensure good throttle response and driveability. Tests show that PEFs provide smooth engine response.
  • Maintaining fuel economy : Air intake and fuel delivery systems are maintained in 'as-designed' conditions, giving precise air/fuel mixture control for minimum fuel consumption
  • Reducing exhaust emissions : The deposit control in this fuel helps maintain proper fuel/air mixture so that emission control systems operate properly to minimise hydrocarbon, carbon monoxide and nitrogen oxide exhaust emissions.

Why should you use PEFs ?

New generation cars like the Hyundai cars use the MPFI (Multi Point Fuel Injection) technology, where the fuel is injected into the engine through fine valves, for better fuel efficiency and emission control. Impurities found in normal fuels tend to clog these fine holes of fuel injectors thereby reducing the efficiency of the engine. They may sometimes even affect the catalytic converters, leading to increased emission. While the regular preventive maintenance of your Hyundai at authorised service centres will take care of problems like clogged valves and intakes, use of PEFs do help avoid the problem from building up in the first place.

Therefore, whether or not you feel a perceptible difference in the drive or fuel efficiency, tanking up on PEFs is a good idea.

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PS: Meet The New Age Horsepower

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While reading through test-drive reports, launch reviews and even technical specifications of automobiles, we often come across two commonly used terms for measuring the power of the engine - BHP and PS. If you've wondered what they mean, this piece is for you.

But first, let's refresh our knowledge on the good old 'horsepower'.

The original

The term horsepower (hp) is rarely used as a formal measure now because it is known to have various definitions. However, the idea persists as a handy term in the automotive industry to benchmark the maximum power of internal combustion engines.

As per the most common definition, 1 hp = 745.69987158227022 W.

Some of you may be aware that James Watt first used the term horsepower for a business venture where his steam engines substituted horses.

Then came BHP

BHP or brake horsepower was commonly used before the 1970's in the USA, is still common in the UK, and was being used till a couple of months back in India. The term derived its name from a device called 'brake', used to measure the true power of an engine. Since the power was not calculated or predicted, but actually measured, it was an indication of a true reading.

PS revealed

PS is now the most common measure for power in India, particularly in the automobile industry. PS or Pferdestärke (German for 'horse strength') is commonly used in Germany and Central Europe. The Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig defines it as:

1 PS = 735.49875 W.

The change from BHP to PS has happened because universally PS is employed as a unit to measure and denote the maximum power produced by automotive engines.

 
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