Fuel Tank Sizing The fuel tank is typically one of the least expensive items in an installation, and it is wise to provide too much, rather than too little, storage capacity. However, while the minimum required capacities of fuel tanks can be estimated, as outlined in the previous discussion of fuel tanks, some applications may… Read More »
Bulk fuel is usually stored in large main storage tanks and transferred to smaller auxiliary tanks (service tanks or day tanks) near engines by electric motor-driven pumps as shown in Figure 3. If auxiliary tanks are not necessary, the main fuel tank must provide a ready fuel supply to the engine-mounted transfer pump. Main Fuel… Read More »
Diesel fuel supply systems must ensure continuous and clean supply of fuel to the engine’s fuel system. The recommended diesel fuel supply system typically has three major components: a fuel storage system, a fuel transfer system and a fuel filtration system. The three component systems provide clean operating fuel to the engine.
Caterpillar ACERT Technology improves diesel engine performance. This technology provides precise control over a range of combustion variables, which can be regulated to produce higher performance with fewer emissions. This new technology works with the MEUI, HEUI and Common Rail fuel systems.
Unlike the MEUI fuel system, in a common rail fuel system injection pressure is created external to the unit injectors in a high-pressure fuel pump which is driven off the engine. The pump pressurizes a high-pressure fuel manifold that runs along both sides of the engine feeding high pressure fuel to the injectors. The electronic… Read More »
The Hydraulically actuated Electronically controlled Unit Injectors (HEUI) use a hydraulic pump and engine oil to generate fuel injection pressure, and an ECM to control the pressure and amount of fuel injected into the cylinders. The operation of the HEUI fuel system is completely different from any other type of fuel system that is actuated… Read More »
The Mechanically actuated Electronically controlled Unit Injectors (MEUI), formerly known as Electronic Unit Injectors (EUI), also use the engine camshaft and push rods to generate fuel injection pressure, but use an Electronic Control Module (ECM) to control the amount of fuel injected into the cylinders. A solenoid on each injector receives voltage signals from the… Read More »
The Mechanically actuated and controlled Unit Injectors (MUI) use the engine camshaft and push rods to generate fuel injection pressure, and a mechanical linkage system to control the amount of fuel injected into the cylinders. The mechanical linkage system connects the governor to the fuel rack, which allows the fuel rate to the engine to… Read More »