Do diesel cars reverse by themselves?
A mate of mine says that on her driving lessons she was in a manual diesel car and when she reversed it, it moved by its self, like an automatic car without having to give it any gas, even when reversing up hill!
I’ve only ever driven petrol cars…Has my mate gone mad? Is it true diesels do this, an if so, is it all of them?
no its not true. the fact is the diesil has a stronger reaction in the engine makig it more difficult to stall. this means you can just get the clutch right and it will move with out and pressure on the gas pedal. you can do it with a petrol as well but it moves very slowely
the engine was probably running to fast on tickover
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no its not true. the fact is the diesil has a stronger reaction in the engine makig it more difficult to stall. this means you can just get the clutch right and it will move with out and pressure on the gas pedal. you can do it with a petrol as well but it moves very slowely
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No, actually, a diesel can run backwards! It does happen. It all depends on condition of the engine, etc. but occasionally it will happen.
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diesel cars do have bigger engines than petrol cars. so when you take the clutch up it moves without giving any gas.
you can do this with a powerful petrol Car as well
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Diesel engines are much stronger than petrol engines. I myself drive a Ford F250 Diesel truck. Just the gears are made in the truck, my F250 can start in 1st by itself w/no gas pedal pressed. It can do reverse too. (not so well going up because it’s a heavy truck). It just all depends on the make/model of the vehicle. Basically it’s all because it’s a diesel engine.
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I have actually done this on a disued airfield - you can start the car and release the clutch when in first gear - you can actually get out of the car and walk around it while cleaning the windows and then jump back in a drive off.
Diesels are quite difficult to stall as they have a much higher compression ratio.
I didn’t believe it either until I was told about it and tried it for myself.
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All the car engines are converting the cranking mechanism into rotary mechanism. The diesel or petrol is moving the piston. In turn it moves the shaft by crank as you see in the manual sewing machine. If you do not start the sewing machine in right direction by hand it will reverse and brake the needle. Occasionally it happens in automobile engines due to the timing adjustment problem. It can be corrected by any automobile mechanics. But the automobile manufacturers can find solution for this problem.
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I know the working principal of car engines.
Diesel engines have a very high torque figures. In consequence, sometimes they don’t need to be revved, there’s enough there on tickover to move the car when you ease the clutch up. Depends on the engine, the tickover speed and the circumstances, but yes, it’s possible.
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Whether you a driving a petrol or diesel engine if your clutch control is upto scratch you can move the vehicle both forward and reverse depending on the gradient of the road. if its up hill you would get away with it more so in a diesel without the use of a the gas pedal. Try it for yourself. Use a quiet street where you won’t upset anbody by holding them up. If your really gentle with the clutch you can all the way upto 5th gear without touching the gas pedal.
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Lots of talk about torque!
Bottom line is, petrol and diesel engines are identical in terms of user involvement. Both have clutches, and if you want to go backwards you gotta drop it in reverse and let the clutch out exactly the same as in any petrol car.
Your friend is in fact completely mad. if the car was creeping in reverse the dozy sod had the clutch engaged. There is absolutely no other answer. Doesnt matter if its got enough to torque to pull the eiffel tower, if the clutch is in it ain’t going anywhere!
If you drive any petrol or diesel car they’ve creep in first or reverse gear if you let the clutch up. Small engined petrol cars are obviously more susceptible to stalling though. You’ll be hard pushed to stall a 3 litre petrol.
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Diesel car typically have much higher low down torque than petrol cars, as a result it is possible to pull away even on hill with out touching the throttle.
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