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Construction & operation of electric windows

construction and operation of electric windows
by

Mark Knight

on 11 November 2014

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Transcript of Construction & operation of electric windows

Changes made to make mechanically operated into electrically operated windows.
Advancements in window
technology
History of Electric Windows
Construction and operation of electric windows
Most modern electric
windows start from...
.
The first cars only started with a front window, such as the Model T Ford. This made journeys uncomfortable due to the lack of protection against the weather.
Cars then moved on to provide full shelter for the driver and passengers. The earliest mechanisms used to open the cars windows were flip open types on VW campers and sliding windows for the sides. This required simple runners and hinges to operate them.
scissor type regulator
Cable type regulator
Prior to the 20th century, window regulators were powered by a hand crank. The crank was located on the door panel where it could be used easily by the driver and passenger. This was a reliable way of lowering the window to let more air in, and is more efficient than a hinged or sliding door. But this meant that the driver had less control of the car when operating the window.
As the motor spins, the teeth on
the motor run against the teeth
on the regulator and this allows the
regulator to travel up and down.
Electric windows have been around since the 1940's. But had always been a paid for luxury up until the 80's. More manufactures have started using electric windows as they had gotten more reliable and efficient. By 2000 most cars were being fitted with electric windows in the front as standard.
When electric windows were placed into the rear of the car, manufacturers also started fitting the drivers console with switches for the other windows and a window lock. This meant that the driver could operate all the windows and stop the use of the rear window switches to stop children, dogs and fools etc from using them and causing a danger to themselves.
The scissor type window regulator was one of the first types of manual wind up window regulators.
Ginger
ginger
By 2010, electric windows had become more standard. But there was still the problem of the driver being occupied by holding a switch whilst driving. To overcome this, manufactures developed 'automatic' switches. These require the driver to simply click the switch once and the window will go up or down depending on which way it is switched. More expensive cars now fit the passenger doors with automatic switches too.
The simple design was cheap to manufacture but allowed the regulator to work effectively inside the confined door space.
Ginger
The hand crank windows are still in use today.
However, they are only used in very cheaply built and offroad vehicles.
G1
The driver has a multi-function switch which allows the driver to take control of all the windows and also lock them as well.
Ginger
The regulator is secured to the inside of the door and is connected to the window with supporting brackets which running in the track guides.
BSi was introduced by the PSA group in the year 2000.
BSi stands for 'built-in system interface'
Put simply, it is a central controller that allows information to be shared across the CAN-bus network.
There is also a similar unit called a SAM unit which
is the unit used by mercedes-benz.
SAM stands for Signal Acquisition & Actuation Module.
It is a sort of fuse box with internal relays and a microprocessor that controls most of the electrical functions of the car. the SAM unit can be reprogrammed can taught new things by using a TAN (transaction authentification number) code.some of the upgrades that can be done include cruise control, paddle gear shift and auto locking doors along with many other upgrades.
When a switch is operated the current is sent to the appropriate window motor
Once the current is received the motor will spin a worm gear against the regulator. Depending on whether the user wants to open or close the window will determine which way the motor will spin.
Changes made to make mechanically operated into electrically operated windows.
Even with the advancement of electric window introduced by packard in 1940, this optional extra was never to popular until the 1970's
As the demand for cars increased the manufacturers also had to improve on safety aspects, the idea of a child lock on windows was introduced.
Japanese car manufacturer Toyota has unveiled a new augmented reality car window.

The project is called "window to the world".
It is about devoloping a window for bored children and adults passengers who are able to doodle on the rear window over a picture of the outside world.
Since the introduction of manual and electrical windows in cars (or the ability to raise and lower the window), a wide range of window assemblies have been introduced. The range of window assemblies serve one main purpose, to aid in the raising and the lowering of the windows.
As manufacturers improved the designs of vehicles there was a need to advance the extras fitted such as electrically operated windows.

Although manual windows have been factory fitted for some time the operation type has been developed from scissor operated to cable operated.

Even though this might not have been a major advancement, it was away of making extras more efficient, reliable and convenient.
Advances over the past few years in electric motor technology has greatly increased reliability in the motor
This was done by introducing the electric motor to the window regulator. This simple development transforms a extra into a luxury.
The cable type regulator works via a cable loop which runs through tracks, guide rails and a hand crank.
Window mount
Window mount
The changes made to the scissor type regulator from manual to electrical was not dramatic, with a change of the hand crank to electric motor which is linked to a power supply
This was a basic design modification by removing several teeth on the half spr gear. This prevents the window from opening fully.
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