In cold weather operation, what heating device does the Digital Control System use for coolant?

In cold weather operation, what heating device does the Digital Control System use for coolant?

• A. Diesel-fired heater
• B. Fuel-fired coolant heater
• C. Electric heater
• D. Solar heater

Answer: (B)

Preheating the engine coolant in cold weather is essential so the engine reaches operating temperature smoothly and quickly, protecting lubrication and sensors from cold-start stress. The Digital Control System uses a fuel-fired coolant heater to accomplish this by heating the coolant circulating through the engine. A fuel-fired coolant heater burns diesel fuel to heat a heat exchanger that transfers heat into the coolant loop. The coolant then circulates through the engine, raising the entire system to the desired temperature. The control system monitors coolant temperature and runs the heater as needed until the target temperature is reached, providing reliable starting and better performance in cold conditions. This approach is favored over electric or solar options because it delivers more heat output and relies less on electrical power, which is limited in cold, remote, or generator-dependent environments.

Preheating the engine coolant in cold weather is essential so the engine reaches operating temperature smoothly and quickly, protecting lubrication and sensors from cold-start stress. The Digital Control System uses a fuel-fired coolant heater to accomplish this by heating the coolant circulating through the engine.

A fuel-fired coolant heater burns diesel fuel to heat a heat exchanger that transfers heat into the coolant loop. The coolant then circulates through the engine, raising the entire system to the desired temperature. The control system monitors coolant temperature and runs the heater as needed until the target temperature is reached, providing reliable starting and better performance in cold conditions. This approach is favored over electric or solar options because it delivers more heat output and relies less on electrical power, which is limited in cold, remote, or generator-dependent environments.