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Cold Climate Operation: Cold Climate Operation:

Cold Climate Operation: - PowerPoint Presentation

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Uploaded On 2017-04-03

Cold Climate Operation: - PPT Presentation

Diesel Engines 1214 General Cold Climate Preparation For cab climate control prolonged idling may be necessary Idle the engine at an RPM adequate to heat coolant above 140 o F 60 o ID: 533312

oil fuel coolant cold fuel oil cold coolant air battery engine temperatures temperature def operation diesel heaters heater heating

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Slide1

Cold Climate Operation:Diesel Engines

12/14Slide2

General Cold Climate Preparation

For cab climate control, prolonged idling may be necessary. Idle

the engine at an RPM adequate to heat coolant above 140oF

(60

o

C), around 800-1000 RPM.

In

0

o

F (-18

o

C) ambient

temperature, this is 1200 RPM

.

There are a number of technologies that can reduce idle time,

save fuel

, and deliver comfort while minimizing the impact to the environment, such as:

Auxiliary Power Unit (

APU

): engine or battery powered

Fuel based heaters

Insulate

exposed lines, filters, pumps, and reservoirs.

Check

electrical systems daily and cold weather support systems weekly.

For

more detailed information, reference

QuickServe

Online or contact your local Cummins distributor. Slide3

What Fluids or Components are Affected?Slide4

Detailed Effect of Cold Temperatures

Recommended Action

Key

Necessary Action

NeededSlide5

Coolant

In cold climates, coolant helps warm the engine and components, it is the first line of defense.

A coolant mixture with a higher concentration of ethylene glycol (>60%) will prevent freezing.In temperatures at 30-50o

F(-1 - 10

o

C) or colder, it is beneficial to use starting aids, such as a coolant heater, or intake manifold heaters.

At -10

o

F (-23

o

C) or colder, it is recommended to use a combination of starting aids.

Coolant Heater (immersion*)* Coolant heaters are available as immersion or external typesSlide6

Fuel

It is important to ensure fuel fluidity. Fuel begins to cloud below freezing and will start to wax or gel around 15

oF (-9oC) depending on blend.

Keep tank full and drain fuel filter

daily.

There are a couple ways to prevent fuel from waxing at these temps:

Fuel blends: No. 1 vs. No. 2

Winterized diesel: includes additives that lower the cloud point. Be mindful that lubricity is key for fuel system components durability.

Fuel warmer: first fit or aftermarket fuel filter with integrated heating systemSlide7

Diesel Exhaust Fluid

DEF

freezes at approximately 11°F(-12oC).

The

DEF

tank is

designed to be frozen and thawed.

It is

heated by engine coolant,

while the DEF

lines and dosing unit are electrically heated. Heating and thawing is controlled automatically through a combination of OEM hardware and engine

ECM software logic. Under colder weather and light duty cycle conditions, heating the DEF to optimal operating conditions could take more time.Slide8

Air

Lower ambient temperature impacts ignition and the combustion process might not release all the energy in the fuel.

Under 32oF (

0

o

C),

i

ntake air could be pulled from the engine compartment in vehicles with externally mounted air filter systems.

To sufficiently pre-heat air in temperatures consistently under -25

o

F (-32oC), consider pulling air from a compartment around the exhaust stack.Oppositely, it is imperative your truck can pull outside air in warmer temperatures

This illustrates a common, simple modification to provided heated air to the intakeSlide9

Battery

While battery specifications require the ability to start at 0o

F (-18o

C), amperage may depend on charge levels.

Make sure your battery has good cranking capacity and holds charge before trips.

Battery warmers can help reduce temperature loss and ensure adequate cranking capacity in cold environments.

Battery

WarmerSlide10

OilAs temperature drops, the viscosity of the oil increases. Higher viscosity hampers oil penetration leading to more friction in the system which can lead to increased parasitics and premature wear.

There are specific oils recommended for cold weather operation, depending on temperature:Slide11

OilOil pans can be covered to limit heat loss.

Oil heaters may also be used to lower the viscosity.

Adhere to the oil change interval schedule to maintain clean oil. Check oil levels

more frequently in extreme cold temperatures.

Oil HeaterSlide12

ResourcesGuidelines are published in Owners Manual and Operation and Maintenance manual

Cummins Service Bulletin (SB) 3379009

Operation of Diesel Engines in Cold Climates

12