01
Sep
Diesel engines do take longer to warm up than their gas-powered equivalents but this is down to diesel engines being larger than gas engines rather than the different fuels. Theres a scientific explanation for why you use less fuel in warmer weather and its to do with air temperature.
Remember though the diesel was meant for a load.
Do diesels run better in hot weather. And therefore burn more in winter getting the engine up to temp than they do in the summer. While those doing 1000s of miles a week are finding the lower hot MPG negates the benefit of a. Diesel engines still suffer heatsoak the same as a petrol turbo but to a lesser extent and in hot weather the intercooler will not be able to reduce the intake temp by quite as much and effciency will drop and therfore performance only slightly though.
Below about 40 F certain hydrocarbons in diesel turn gelatinous. Since an engine depends on aerosolizing fuel you dont want goopy fuel Ciatti explained. Often this is remedied with glow plugs which are heated by the battery and help warm up the fuel so it can vaporize.
Diesel engines do take longer to warm up than their gas-powered equivalents but this is down to diesel engines being larger than gas engines rather than the different fuels. Diesels also hold larger volumes of oil and coolant and the engine runs a fuelair ratio thats twice as lean as a gas engine. A diesel itself will never warm up just idling its gotta be under load to build heat.
Most of the more reputable gurus pretty much all say the same thing - get pressure and fluids flowing and take it nice and easy until up to temperature. Coming to should you allow diesel engine to warm up before driving off the answer is undoubtedly yes. Should you allow diesel engine to warm up.
In hot weather the air conditioning in the cab keeps the operator cool. But there are disadvantages. The engine uses fuel whenever it is running.
But unlike gasoline engines diesel engines operate at close to maximum thermal efficiency even when idling. Once the air inside the combustion chamber reaches 480 F due to compression diesel fuel ignites from the heat and the engine starts running. Usually diesel engines take less than a second to start.
However once the ambient air temperature gets colder diesel engines become significantly harder to. Usually the intercooler works to cool the air from the hot air intake but in warmer temperatures the intercooler becomes less efficient as it is also exposed to the warmer temperatures. Again this serves to increase the amount of work the turbo has to do reducing.
Modern diesel engines do not require the amount of time to warm up as in years past. There are many advancements made to cut this warm-up time down and maintain high levels of durably. You will find that most are down to 3 minutes before you put a load on the engine.
Remember though the diesel was meant for a load. If you cant shelter your vehicle when the temperature falls below zero use a battery warmer an oil warmer or a block heater to keep the engine warm. Youll likely need an extension cord to connect to a household outlet.
You should also add a diesel fuel conditioner with anti-gel which drops the freezing point of diesel fuel. Add this product to your fuel tank as soon as temperatures fall below. Hot air rises and cold air falls.
Since the cold air is has more oxygen in effect when the air enters a cylinder there is more air andor oxygen to be more precise. Since cold air causes the molecules to shrink or compress more dense cold air andor oxygen actually has more weight than hot air. Along with change your oil every 3000 miles and use premium gas to get more horsepower the idea that diesels dont start well in cold weather is an old myth that just wont die.
Hot weather can actually increase your fuel economy. Your engine warms up to an efficient temperature faster. Summer grades of gasoline can have slightly more energy.
And warm air causes less aerodynamic drag than cold air. However keeping passengers comfortable in hot weather by rolling down the windows or using the air conditioning AC can reduce fuel economy. Smaller diesels lose the heat of compression faster.
The hot air literally heat sinks to the piston head and block too fast. This is one reason you find small diesels with much higher compression ratios of 211 to 1 compared to the 16 to 1 of the much larger diesels. Not only do the smaller diesels.
You should let your engine idle for a few minutes to warm up before getting underway. As noted above a diesel will not warm to operating temperature until it is under load. Thus you need only let the engine idle long enough to fully circulate the oil30 seconds is plenty.
But dont immediately put the pedal to the metal. Winter diesel has a blend of hydrocarbons that have a lower freeze point. It is more costly but it keeps trucks running in most winter weather.
However this does not help if the weather is unseasonably cold and the fuel suppliers have not made the switch to the winter diesel. Theres a scientific explanation for why you use less fuel in warmer weather and its to do with air temperature. As you may know your engine uses air as well as gas in order to generate energy.
Diesel fuel can become gelled when the diesel starts to turn into a solid when the temperature drops. The fuel will start to gel and clog at 10 to 15 degrees. This will clog the tank and fuel filters.
You should watch the fuel at any temperature below 32. 1 It cools the induction charge which allows denser air. 2 Water going from liquid to gas expands greater than what an airfuel mixture expands when burnt.
3 It effectively raises the point at which gas burns which means you can run a higher compression ratio as well as more advance in your ignition. If the vehicle will run long enough to warm up often it will generate enough heat to stay running. The temperature at which fuel gels depends on many factors including seasonal changes.
Normally suppliers of diesel dont want their fuel to gel up so they take a. Theyre not intended to be run through your tank on a regular basis. Change Fuel Filters Its a fact that the fuel filter is the most common freeze point for diesel fuel.
When compared to what is stored in the fuel tank a very minimal amount of diesel remains in the fuel filter when your truck is allowed to sit overnight. Let your engine warm up like you warm up in the morning. Let the glow plugs and intake heater do their job.
Fire the engine and give it some time for the combustion heat to warm. Diesels and extremely cold weather. Fluids and particularly diesel itself behave differently as the temperature drops.
Diesels viscosity increases at lower temperatures known as gelling or.