Archive for the ‘Car technology’ Category

Winter Tyres – Should We Be Taking Them Seriously?

Friday, January 15th, 2010

The recent snowy and icy conditions have highlighted just how useless most modern cars are in these conditions. But all over Europe, people drive just the same cars – often in countries that have far more snow and ice than we ever do. How do they manage it?

One of the ways they manage it is by using winter tyres in winter! In many European countries, it’s actually a legal requirement from around October/November through to the spring.

You may not realise it, but the vast majority of tyres fitted to UK road cars are actually summer tyres, designed for use when the temperature is well above freezing and there’s no ice or snow on the ground. Come winter, these summer tyres are useless.

According to tyre maker Continental, winter tyres account for just 0.5% of UK tyre sales – yet they also say that winter tyres perform better whenever temperatures fall below 7 degrees, not just in snow and ice. The main difference is that winter tyres have a slightly blockier tread and are made from slightly softer compound rubber, making them more flexible and grippy in very cold conditions.

In case you aren’t convinced, take a look at this video of a tyre test by Autocar magazine. Even accounting for the difference in cars, it makes a strong argument for the performance of winter tyres.

Update: On a final note, don’t think that because you’ve got four wheel drive you are immune from snow problems. Proper 4WD cars with off road tyres may do much better – think Land Rovers, for instance – but many ’soft roaders’ like the Honda CR-V don’t do much better at all – because they’ve just got summer road tyres on. Andrew Frankel illustrates this graphically in this blog post!

Choosing & Fitting A Roof Box To Your Car

Tuesday, September 29th, 2009

A roof box can be an affordable and simple way to increase the luggage capacity of your car. They also allow you to keep wet and dirty stuff like sports gear outside your car – put it in the (washable) roof box instead.

If you aren’t familiar with roof boxes, they are basically moulded plastic boxes that fit onto roof bars on top of your car – like this:

When choosing a roof box, you need to consider a couple of things:

  • How much you want to carry – don’t have a box bigger than necessary
  • Whether you will want to use the roof rack for anything else at the same time – such as a bike. Half width roof boxes are available that allow you to carry a bike or skis on the roof at the same time.

Whichever roof box you choose, you will also need roof bars. These fit across the roof of your car – the roof box will mount on these bars. Roof bar fittings are often car-specific, so you must ensure you buy the right fittings for your car.

Halfords stocks a wide range of roof bar fittings, roof bars and roof boxes – it makes an excellent place to start your roof box research.

Fitting a Bike Rack To Your Car

Thursday, September 24th, 2009

If you have ever tried to fit a bicycle into a car, you will understand why bike racks are so popular.

Bike racks allow you to carry one or more bicycles on the outside of your car – keeping the inside clean and free for passengers and regular luggage.

Bike racks are relatively cheap and can be used to carry up to 4 bikes, depending on design. This makes them suitable for individuals, couples and families. There are, however, a few important choices you need to make if you are considering buying a bike rack for your car.

What Type of Fitting?

Bike racks come in three main types of fitting – roof rack, tow bar and rear mounted. Each has a number of pros and cons.

Roof Mounted Bike Racks

Roof racks have several advantages:

  • They allow free access to the boot of your car when the bikes are in place
  • They don’t increase the length of your car or require a rear numberplate/light board
  • You can often use the roof rack for carrying other objects too, not just bikes

There are, however, some disadvantages, too:

  • Overall vehicle height increases dramatically – you may have problems with some car park height barriers
  • Can be awkward to lift bikes on and off the roof without damaging paintwork/straining yourself

Rear Mount Bike Racks

Rear-mounted cycle carriers generally fit over the back of the car.

Advantages include:

  • Increase in overall vehicle height is kept to a minimum
  • Easier to lift bikes on and off than with a roof rack
  • Keeps roof free for a roof box – handy for family holidays

There are some disadvantages, too:

  • Many rear mount bike racks obscure the car’s rear lights and/or number plate. This is illegal so you may require a number plate or light board for the back of your car.
  • Rear mount bike carriers place additional weight at the rear of your car, rather than balancing it in the centre
  • Rear mount bike racks increase the overall length of your car, meaning that parking in tight spaces can become more difficult

Towbar Bike Racks

Towbar bike racks share many of the advantages and disadvantages of rear mount bike carriers. The main difference is that they mount on your tow bar, rather than on your car. This reduces the chance of damage to paintwork and may enable you to open your boot more easily when the rack is fitted.

Halfords offers a good range of bike racks, including all the major types I have described above. It’s a good place to start when looking for a cycle carrier – especially as you will be able to see most of the racks in the flesh and get an idea of how easily they might fit to your car.

As with most car accessories, Halfords also offers a fitting service for bike racks.

Using Your iPod In A Car (& Other mp3 Players)

Saturday, September 19th, 2009

Mp3 players are ideal for in-car use – all of your music on a device the size of one cassette tape. The only potential problem is connecting your iPod (or other mp3 player) to your car’s stereo.

People with new cars may find this is a doddle – many cars now come with connections for mp3 players already fitted. A friend’s 07 reg Ford Focus, for example, has a connector for mp3 players in the glove box.

Owners of older vehicles may find that a little more ingenuity is required. There are several possibilities:

  1. Your car stereo has an ‘Aux in’ socket on it.
  2. Your car stereo has a tape slot.
  3. Your car stereo has neither a tape slot nor an ‘Aux in’ socket.

1. Using ‘Aux in’ Sockets

‘Aux in’ stands for auxiliary input and it allows you to plug a music playing device into your car stereo and play it through the car’s speakers.

Usually, this requires a cable with a 3.5mm stereo mini jack at each end (like the plug on most headphones). You plug one end into the headphone socket of your mp3 player and the other end into your car stereo.

2. Using A Tape Adaptor

Those of you with older cars may still be blessed with an in-car cassette player. This gives you the option of using a tape adaptor to connect your mp3 player to your car stereo.

Although tape adaptors are cheap, most of them are pretty rubbish, too. You have been warned.

The only one I know of (I use one myself) that seems reliable and provides good quality sound is the Sony CPA-9 car adapter. The only problem is that this model seems to be hard to find in the UK – try eBay or Amazon marketplace.

3. Radio Adapters

If your car stereo doesn’t have a tape slot or an ‘aux in’ connection, then your only option is to use a radio adapter.

These devices are basically low power radio transmitters that plug in to your mp3 player’s headphone socket. You then tune your car radio into the right frequency and listen to your music on the radio.

Although this sounds like a brilliant solution, these do have their problems, too. On long journeys, you will have to change frequencies sometimes to avoid interference. Sound quality is not always great, either, especially on really cheap models.

These are the three main options – cable, tape adapter or radio. If you can connect your mp3 player directly to your car stereo with a cable, then do it – you will get the best sound, reliability and least hassle.

How To Replace Windscreen Wipers

Tuesday, September 15th, 2009

Windscreen wipers are one of those things you take for granted – until they stop working.

The most common problem with windscreen wipers is worn out or damaged wiper blades – the rubber bits that sweep across the windscreen. These are the bits that you may need to replace, from time to time.

Windscreen wipers are also part of the MOT test – they must clear the windscreen effectively. Failure to do this means your car will fail its MOT until they are replaced.

How do I know what wiper blades to buy?

The main thing is to get the right type of replacement blades with the right type of fitting. There is a simple way to do this:

  1. All branches of Halfords (and most other decent car accessory shops) have a catalogue for windscreen wipers. Find your nearest store and find this catalogue. (Halfords also has an online version – click here to find the right wipers for your car)
  2. Look up the make, model and age of your car in the catalogue.
  3. Choose which wipers you need to replace (front nearside, front offside or rear) and make a note of the code for that size of wiper.
  4. Go to the windscreen wiper selection and find the right wiper. Usually, they come singly – one in each box. Each box should also contain one or more plastic fittings, which are used to fit the wiper to the metal wiper arm.
Each box usually contains one of these - a wiper blade, ready for fitting

Each box usually contains one of these - a wiper blade, ready for fitting

You may find a choice of very cheap and not quite so cheap wiper blades. The more expensive ones are typically a brand name, such as Bosch. My experience is that the more expensive wiper blades tend to come with plastic fittings that are easier to use and more closely match the original ones on my vehicle.

The really cheap wiper blades tend to come with ‘one size fits all’ plastic fittings that sometimes don’t work as well or are very fiddly to fit. Anyone else had this problem?

Fitting new windscreen wiper blades

Fitting new wiper blades varies between cars but is not generally difficult – they just clip in and clip out.

However, if you are not comfortable changing wiper blades yourself or would just like a hand, Halfords do offer a fitting service at most stores. For a few pounds, they will come out to your car and fit the right part, there and then.

If it’s your first time or if you are in a hurry, it could be money well spent.

Visit Halfords’ website to find and buy the right wiper blades now

The three-point seat belt celebrates its 50th birthday – make sure you use it

Thursday, August 13th, 2009

Today marks the 50th anniversary of the delivery of the first ever car with three-point seat belts. It was a Volvo PV544, delivered to a customer in Sweden. Three-point seat belt technology was invented by Volvo – but the patent covering the 3-point seat belt technology was immediately made free to use for all other manufacturers, meaning that virtually every vehicle on the road benefits from a little of Volvo’s legendary safety research.

Despite all the advances in car safety over the last 50 years, it is generally acknowledged that the single most important safety feature of any car is its three-point seat belts.

It’s impossible to know how many lives the three-point seat belt has saved over the last 50 years, but safety experts believe it to be around one million – plus millions of injuries avoided. It is even harder to know why some people persist in letting their children travel without a seat belt.

I have personally experienced the life-saving power of a three-point seat belt. For this reason particularly, it upsets me deeply when I see cars driving around with unbelted children in the back.

I believe that allowing your children to travel without belting up is a form of parental negligence. I cannot understand why anyone would do it – collisions happen out of the blue and you will never be prepared for one. If your children ever remove their seat belts while driving, please:

  • Stop the car
  • Belt them up
  • Discipline and rebelt them if they undo their seat belts

It’s not just your children’s safety you have to worry about – unbelted people can be a danger to others, too. Unbelted bodies are thrown around uncontrollably in the event of a collision, as this video shows:

Getting Used To Automated Clutch Transmissions

Monday, August 3rd, 2009

In my recent article about the different types of automatic transmission that are used in today’s cars, I failed to mention one thing – getting used to actually driving them.

In most cases, this isn’t an issue – torque converter and CVT autos are simplicity themselves to operate and provide smooth acceleration in almost all circumstances.

Automated clutch transmissions – or automated manual transmissions, as they are also known – are slightly different. Getting smooth acceleration is entirely possible but you do have to develop the right technique.

Well-known car expert Honest John mentioned this in his Telegraph column last Thursday. I believe the correct technique is to only use a moderate amount of accelerator until the car has engaged gear and moved off. It may also be necessary to modulate the pressure on the accelerator to coincide with gear changes. It’s basically a little more like driving a manual but without operating the clutch yourself.

The traditional automatic driving technique of ‘just flooring it’ results in jerked gear changes, as Honest John’s correspondent notes.

Powered by Air – The Future or a Neat Gadget?

Monday, June 29th, 2009

Electricity, hydrogen, LPG, LNG, CNG, ethanol, biodiesel – they have all been suggested as possible replacements for oil-based petrol and diesel fuels.

But what about air?

That’s right. A Luxembourg-based company called MDI (Motor Development International) has developed an air-powered engine it says could revolutionise transport. Is it right, or will the MDI AIRPod just end up as another intriguing alternative fuel experiement that came to nothing?

I don’t know. But this review of the MDI AIRPod by US website Edmunds.com seems very impressive to me.

Clearly an air-powered engine will have zero direct emissions and the infrastructure required to provide compressed air should not be as challenging as that required to provide hydrogen or high-voltage battery charging.

A small fleet of AIRPods are due to go on trial at Paris’ Charles de Gaulle Airport this year, to be used by Air France and KLM as passenger and cargo shuttles. Further trials are under negotiation and the AIRPod is due to be on sale in France by the end of this year – at just over  €8,000.

Watch this space.