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I am not 100% sure but as I understand it if some combustible substance (like an oil leak in a car) gets mixed with the air intake then it will cause the engine to rev up even if you cut the fuel intake (as the oil leak is a second, uncontrolled fuel intake). A lot of diesel engine have safety measures to cut the air intake if it over-revs thus stopping both the intake of air and of the second, uncontrolled fuel intake and thus cutting out the engine.
The above answer is derived from reading discussion about the diesel engines on the Deep Water Horizon (2010 BP oil spill) possibly not having such air flaps to cut the air intake (or inoperative ones) as a possible cause for the explosion that sank the drilling rig given that when the well kicked a large amount of natural gas would have been mixed with the air and if it went to the diesel engine would cause it to rev up. If there were no (working) air flaps then it would cause the engine to over-rev to destruction and thus cause the igniting spark. As of writing it is just conjecture as said diesel engine is still at the bottom of the Gulf of Mexico.
What else can I help you with?
What causes a diesel engine to over rev and not shut off?
When engine oil leaks past the turbo seal it can collect in the innercooler. This collected oil then can be sucked into the engine and burns as fuel. This uncontrolled oil that has now being burnt as fuel causes uncontrolled revs of the engine resulting in over rev of the engine. Since the oil is not metered by the fuel system, turning the ignition key off has no effect on stopping the engine and the engine will continue to run uncontrolled until the oil source is consumed or the engine fails. The only way to try and stop this over rev on collected oil is to cut off the air to the engine. Cloth towels, shirts or any other cloth like material placed over or into the air intake to shut off all air to the engine can work.
How do you use revved in a sentence?
The engine has a short rev range, like a diesel.
Can a diesel gearbox be used with a petrol engine?
It will physically fit as many diesel engines share the same blocks, but the gear ratios will be unsuitable, due to the reduced effective rev range of a diesel compared to the petrol engine. In short, will probably fit, won't work
Can a petrol gearbox be used with a diesel engine?
It will physically fit as many diesel engines share the same blocks, but the gear ratios will be unsuitable, due to the reduced effective rev range of a diesel compared to the petrol engine. In short, will probably fit, won't work
How to remove a limiter on a diesel engine?
Hi there new to this so here goes. Most diesel engines are governors to prevent engine damage there some aftermarket devices to allow engine to rev higher such as governor spring kits on older ones or programmer chips for newer ones hope this helps lots info on diesel engine forums
Is there a rev limiter on ford explorer 2004?
The Powertrain Control Module will cut back on the fuel to protect the engine
How do you fit a rev counter and temp gauge to a 1990 205 GRD?
The sensors are not there I dont think. You will have to get them from a Turbo Diesel engine and prob fit the sensors. ALOT OF HASSLE! Its not worth it. You could buy a turbo diesel 205 lump and fit that with the wiring loom? Still lots of work. I fitted the engine but not the loom and dont mind that I dont have a rev counter.
What causes a lawn mower engine to rev up and down with out moving the throttle setting?
The governor spring adjustments
What causes an engine rev up and go on its own?
it might men that your gas intake lever is sticky or rusted
What makes a vehicle cut out if pressing hard on gas?
its called a rev limiter. It keeps the engine from over reving and breaking.
What causes a Hyundai Elantra 2001 manual transmission's engine to rev while in neutral?
I had this problem, I had a faulty TPS sensor
What will cause a car to over rev and cut out when in netural?
A car may over-rev and cut out in neutral due to a malfunctioning throttle position sensor, which can send incorrect signals to the engine control unit, causing the engine to rev uncontrollably. Additionally, a vacuum leak or issues with the air intake system can disrupt the air-fuel mixture, leading to erratic engine behavior. Lastly, a failing idle air control valve may prevent proper regulation of the engine’s idle speed, contributing to over-revving and stalling.
