How much fuel does a diesel car consume when idling for one hour?
2 Answers
Diesel cars consume approximately 1-2 liters of fuel when idling for one hour. Below is an introduction to diesel engine idling: 1. Introduction: Diesel engine idling usually refers to the operating condition where the diesel engine runs without load. For automotive diesel engines, it refers to the engine speed when in neutral. For diesel engines used in power generation, it typically refers to a certain no-load speed after startup, generally above 0.8 of its rated speed. As for diesel engines used as marine main engines, there is usually no such term as idling. 2. Method of obtaining: If you need to know the idling fuel consumption of a specific diesel engine, you can refer to its speed characteristic curve or load characteristic curve based on its idling speed value to obtain an approximate estimation.
As a friend who often drives trucks, I've noticed that diesel vehicles don't consume too much fuel at idle, generally between 0.5 to 1.5 liters per hour, depending on what you're driving. For example, with the large SUV I drive, idling for an hour consumes about 1 liter, but if the engine is larger or the air conditioning is on, fuel consumption can go up to around 1.5 liters. This is mainly because diesel engines are quite efficient at idle, with their high compression ratio making them more fuel-efficient. However, fuel consumption can increase during cold starts or as the vehicle ages. I recommend avoiding prolonged idling—not only does it waste money on fuel (with diesel now costing around seven or eight yuan per liter, idling for an hour can cost several yuan), but it also leads to carbon buildup in the engine, which can weaken performance over time. It's better to turn off the engine at red lights or reduce idle time, as this can save a lot of expenses and be more environmentally friendly.
