The Fuel System
12. The petrol pump
13. The air filter
14. The carburetor
15. The fuel injection system
16. The vacuum system
17. The fuel pipe fuel filter
18. The fuel tank
19. The accelerator operating mechanism
(1) by PT pump for the injector fuel for the low pressure oil, because there is no diesel engine high pressure oil pipe, usually to reduce the possibility of a leak and pressure fluctuations affect the performance of fuel injection.
(2) the fuel spray combustor need high pressure is generated by the fuel injector rather than PT pump. The engine work, through the CAM and rocker mechanism, force driving fuel injector piston movement for measurement and jet fuel. Due to large plunger diameter, movement speed and nozzle area is small, injection pressure can be as high as more than 9.8 million mpa, is advantageous to the atomization of fuel, burning completely, small exhaust pollution.
(3) by PT for to only about 20% of the injector pump spray cylinder, the remaining 80% through the injector cooling, then the return pipe flow back to float box. PZ, pump in the gear oil pump has bigger displacement, only will be supplied with its oil supply about 28% of the amount of fuel oil to fuel injector, while the remaining 72% of the fuel in the PZ, pump after the inner loop back to the suction mouth of the gear pump, used for lubrication and cooling PT pump in high speed movement of the parts.
4 PT fuel system of the injection time is determined by drive injector CAM location and shape, fuel injection start time along with the increase of engine load (oil) in advance, fuel injection end is always the same. Injection time has nothing to do with the engine speed. The engine assembly meets
After requirements, use without adjustment.
5. Compact structure, small volume, light weight, less precise matching parts, reliability and durability of the good work.
6. Applicable scope is wide, good commonality, easy to variant and mass production. PT fuel system can be applied to various USES of diesel oil properties, the same dimension of PT pump and fuel injector, only need to change the individual parts, can be suitable for different USES and different
Power range of all kinds of diesel engine.