Portable Hydraulic
Portable Hydraulic
Why don't cars have built in jacks to change the tyre?
It's not hard for car companys to build a hydraulic jack into each corner of the car and run a pump of the engine. We use hydraulics for the braking system assisted by the engine so why not to lift the car?
Saves lying down on wet tarmac trying to find out where the portable jack goes...
... yeah your right... i have just had to change my tyre, in the dark, raining and on the hard shoulder of the motorway.
You've been pretty unlucky, with modern tyre design flats are increasingly rare, which is why car co.s have moved from spare tyre -> space savers -> can of foam -> run flat tyres.
It saves weight & manufacture cost.
The problem with 4 hydraulic jacks idea, is how often would you use them, and if you left them alone for 6 years or more, when you had to use one, chances are it wouldn't work.
I've seen a bag device you attach to your exhaust and as it inflates it lifts the car, seems easier and pretty foolproof compared to a jack.
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