A diesel electric power system can drive multiple propellers from a single engine or use multiple engines to power one or more props. In a twin-engine/twin-prop system, one engine can power both props when operating within the speed limits imposed in many areas. Electrical power from the vessel’s genset can be used to propel the boat It’s common for someone unfamiliar with diesel engines to question why or how they create the impressive amounts of torque they do. The torque-to-horsepower ratio in diesel engines is rarely lower than 2:1, and it’s typical to see ratios of 3:1 and even 4:1 in heavy-industry engine applications. Gasoline engines are much closer to a 1:1 ratio. DEF consists of 32.5% urea and 67.5% deionized water. Its use in the selective catalytic reduction (SCR) system of a diesel engine helps break down harmful NOx particles. When injected into the system, DEF reacts with NOx to convert it into nitrogen, water, and small amounts of carbon dioxide. This reduces harmful emissions and increases fuel Here’s the whole process, as it would occur in a 4-stroke cycle: Stroke 1: Air Intake – The opening of the intake valve allows fresh air to enter the combustion chamber. The piston moves down as air enters. Stroke 2: Compression – The piston compresses the air in the cylinder by moving back up. Compression ratios from 15:1 to 25:1 are the Diesel fuel consumption: Consider evaluating the diesel fuel consumption rates of the engines while comparing substitution rates. If an engine delivers better diesel fuel economy, then that engine starts the substitution rate comparison with an important advantage. Check out how dual fuel engines work to learn more. How Do Diesel Engines Work? Diesel engines are internal combustion engines that utilize the heat generated from the compression of air to ignite the fuel. Unlike gasoline engines, diesel engines do not use spark plugs to ignite the fuel, but rather rely on the high compression ratio to produce the necessary heat. Here's everything you need to know about the differences between petrol and diesel engines.Follow Alex: 9. Diesel engine timing is accomplished through the fuel injectors (they inject fuel at the proper times). Proper timing prevents pre-ignition because there's no fuel in the cylinder yet to ignite. Glow plugs and/or well-designed high pressure injectors ensure the diesel is in a suitable state for combustion and prevent delayed ignition. JPC9.