Pic. 2.200. The fuel system of a Camry car with a 1MZ-FE engine: 1 - fuel injector; 2 – pulsation damper; 3 - fuel tank; 4 - fuel pump
The fuel system without fuel return to the tank is used to reduce the emission of fuel vapors. The car uses a compact fuel pump (see fig. 2.200), in which the fuel filter and pressure regulator are combined in the fuel pump unit. A quick coupler is used to connect the fuel line to the fuel supply hose to improve operational reliability. A compact 12-hole fuel injector with a high degree of fuel atomization is used. As a result, it became possible to abandon the auxiliary pneumatic system used on the previous Camry model. The filler cap of the fuel tank has a flexible connection with the neck, which prevents the cap from being lost and helps prevent fuel or its vapors from leaking through the neck.
Fuel system without fuel return to the tank
Pic. 2.201. The scheme of the fuel system: 1 - fuel pump; 2 - fuel filter; 3 – pulsation damper; 4 - pressure regulator; 5 - block of the fuel pump; 6 - fuel tank
This system is used to reduce fuel vapor emissions. As shown below (see fig. 2.201), the integration of the fuel filter, pressure regulator and fuel level sensor in the fuel pump assembly eliminated the return of fuel from the engine and prevented the temperature rise in the fuel tank.
Fuel burner
Pic. 2.202. Fuel burner
A compact 12-hole fuel injector with a high degree of fuel atomization is used.