Heater Motor Oil Used

A block heater is an electric heater that heats the engine of a car to ease starting in cold weather. They are connected to normal AC power overnight or before driving, via regular power plugs that are fed through a vehicle's grille. This allows easier starting in cold temperatures, by keeping the coolant warm. Heaters are also available for motor oil so that warm oil can quickly circulate and warm the engine during startup. The rapid heat circulation caused by block heaters also aids the initial vaporization of fuel in the engine; because of this effect, block heaters reduce pollution, as poor fuel vaporization causes much higher emissions.

Research by the Agricultural Engineering Department of the University of Saskatchewan in Canada has shown that operating a block heater for longer than four hours prior to starting a vehicle is a waste of energy. It was found that coolant temperature increased by almost 20 Celsius degrees in that period, regardless of the initial temperature (4 tests were run at ambient temperatures ranging from -11 to -29 degrees); continued use of the heater for a further one or two, or more, hours achieved a mere 2 or 3 more degrees as conditions stabilized. Engine oil temperature was found to increase over these periods by just 5 Celsius degrees.

Block heaters are widely used in many northern U.S. states, and are very common in regions with colder climates like Canada and Scandinavia. In colder climates block heaters are often standard equipment in new vehicles. In extremely cold climates, electrical outlets are sometimes found in public or private parking lots, especially in multi-storey car parks. Some parking lots cycle the power on for 20 minutes and off for 20 minutes (e.g., the Light Rail Transit lots for a number of Canadian cities), in order to reduce electricity costs.

Block heaters are usually inserted into a freeze plug manufacturing hole in the cylinder block, heating the metal, coolant and oil. These can be installed at the factory, or by any qualified automotive service center. A block heater can even be installed by the handy do-it-yourselfer.

There are many alternatives to a block heater that have some of the same benefits. A particularly simple option is to buy an after market heater that is attached to the oil pan, sometimes with magnets. Also, one can even get a heated dipstick. Another alternative to block heaters is a battery warmer, which keeps just the battery warm. This maintains the efficiency of the battery, which is highly dependent on temperature, and is cheaper than heating the entire engine block. Heated blankets are available for the entire engine area, as well. A standard timer switch can be used with any of these heaters, so that it does not have to be left on all the time. This can help lower the electrical costs of owning and using a block heater.

Andrew Freeman, a North Dakotan, invented the headbolt heater in 1947 and received a patent for it on November 8 , 1949 . Before the block heater was invented, people utilized various means of warming engines before starting them, such as pouring hot water on the engine block or draining the engine's oil for storage inside overnight. Some even shoveled hot coals underneath their vehicle's engine to achieve the same effect.

During the dawn of aviation in pre-war Northern Canada, aviators flew with flight engineers who were responsible for preparing the radial engines for shutdown and startup in order to mitigate the effects of sub-zero temperatures. The flight engineer was responsible for draining the oil into buckets at night, and pre-heating both the engine and the buckets of oil using a blanket wrapped around the engine and a device known as a blow pot, essentially, a kerosene jet-heater used several hours prior to flight.

Some cars, such as the second generation Toyota Prius pump hot coolant from the cooling system into a 3 litre insulated thermos-style reservoir at shutdown, and stays warm up to 3 days later.

References

1. ^ http://www.hydro.mb.ca/your_home/home_comfort/block_heaters.pdf
2. ^ Dakota Datebook
3. ^ Harbour Publishing - Bent Props & Blow Pots

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