Fuel systems
We all know that power is produced from fuel. As we start choosing ourselves a car, we often think about it's fuel consumption. Fuel efficiency is very important also in terms of tractors. Tractors are made tu pull or run heavy implements and long hours, so even as small consumption increase can be surprisingly expensive.
For supplying the engine with fuel, we first need fuel tank. From fuel tank the fuel is pumped through filters to feed injection pump or high-pressure pump. To use less fuel and produce less emissions, fuel must be injected to the cylinder at very high pressure and very precise time. The higher the injection pressure, the less particles the engine emits.
Until about 2010 tractors have had injection pumps (inline or distributor type), but these are being phased out as emissions standards are tougher to achieve and replaced by Common Rail fuel systems.
Common Rail fuel system's heart is a high pressure pump that pumps fuel to a common fuel rail at very high pressure (it can go even over 2000bar). Injectors get fuel from the rail and their injections are operated by electornic engine control module (Engine ECU).
The advantage of Common Rail system is that ECU can inject the correct amount of fuel at the best time according to information from various sensors on engine. In most advanced systems the injectors can inject fuel up to 5 times at one stroke (this is really quick switching) and consequently keep the combustion optimal (compromising power, fuel efficiency and emissions).
For supplying the engine with fuel, we first need fuel tank. From fuel tank the fuel is pumped through filters to feed injection pump or high-pressure pump. To use less fuel and produce less emissions, fuel must be injected to the cylinder at very high pressure and very precise time. The higher the injection pressure, the less particles the engine emits.
Until about 2010 tractors have had injection pumps (inline or distributor type), but these are being phased out as emissions standards are tougher to achieve and replaced by Common Rail fuel systems.
Common Rail fuel system's heart is a high pressure pump that pumps fuel to a common fuel rail at very high pressure (it can go even over 2000bar). Injectors get fuel from the rail and their injections are operated by electornic engine control module (Engine ECU).
The advantage of Common Rail system is that ECU can inject the correct amount of fuel at the best time according to information from various sensors on engine. In most advanced systems the injectors can inject fuel up to 5 times at one stroke (this is really quick switching) and consequently keep the combustion optimal (compromising power, fuel efficiency and emissions).