3. Block diagram of the system

To analyze the functioning of the system in case of failure of some of its elements should be based on the concept to develop a block diagram based on serial or parallel connection of elements.

Connection type elements in the block diagram is affected by failures of individual elements on the performance of the whole system.

Serial communication is done then, if component failure leads to a malfunction of the entire system.

Parallel connection element is satisfied if, when the failure of one of the elements does not lead to malfunction of the entire system, as parallel connected element starts to act as the element that refused (principle of redundancy).

Since modern functional systems are a complex set of interconnected units, it is advisable to pre-system divided into functional blocks. Grouping units (elements) in blocks should be carried out in accordance with their functional connections, and then a block diagram detailing the elements.

1  Tanks; 2  booster pumps; 3 - check valves; 4 - fire valve; 5 - coarse filtering device; 6 - low-pressure pump; 7 - a fine filter; 8 - fuel-regulating equipment; 9 -nozzles

Figure 2. A simplified schematic diagram of the fuel system

To analyze the functioning of the system in case of failure of some of its elements should be based on the concept to develop a block diagram based on serial or parallel connection of elements. Element type compound in the block diagram is affected by failures of individual elements on the performance of the whole system. Serial communication is done then if element failure leads to malfunction of the entire system. Parallel connection element is satisfied if, when the failure of one of the elements does not lead to malfunction of the entire system as connected in parallel element starts to act as the element that refused (redundancy principle). Since the modern functionality of the system is a complex set of interconnected units, it is advisable to pre-system divided into functional blocks. Grouping units (elements) in blocks should be carried out in accordance with their functional connections, and then a block diagram detailing the elements.