Mazda CX-5 Service & Repair Manual: Direct Fuel Injection System
Purpose, Outline
-
Engine output has been improved through the direct injection of fuel into the combustion chamber.
-
High response can be because there is no time lag from when the fuel injection starts until the fuel is provided to the combustion chamber.
Structure
-
The direct fuel injection system consists of the following parts.
|
Part name |
Reference |
|
High pressure fuel pump |
(See HIGH PRESSURE FUEL PUMP [SKYACTIV-G 2.0].) |
|
Fuel injector |
(See FUEL INJECTOR [SKYACTIV-G 2.0].) |
|
Fuel distributor |
(See FUEL DISTRIBUTOR [SKYACTIV-G 2.0].) |
|
Fuel pressure sensor |
(See FUEL PRESSURE SENSOR [SKYACTIV-G 2.0].) |
|
Relief valve |
? |
Operation
-
Fuel is supplied from the high pressure fuel pump into the fuel distributor, and the fuel injector injects the fuel into the cylinder. Fuel is injected during the intake stroke and diffused uniformly in the combustion chamber by the flow of intake air. For the fuel injection control, refer to the CONTROL SYSTEM..
-
The fuel pressure sensor detects the fuel pressure in the fuel distributor and sends a fuel pressure signal to the PCM. Based on the signal from the fuel pressure sensor, the PCM controls the high pressure fuel pump so that the fuel pressure is in accordance with the driving conditions. For the high pressure fuel pump control, refer to CONTROL SYSTEM..
-
Fuel pressure is adjusted by the spill valve control solenoid valve, and a relief valve is equipped to ensure safety in case of a malfunction. If the fuel pressure in the high pressure fuel pump reaches the set pressure, the relief valve is mechanically opened and fuel is returned to the fuel tank side.
Check Fuel Cap Warning Light
Purpose/Function
The check fuel cap warning light is built into the instrument cluster.
If the PCM detects that the fuel cap is open, the light illuminates to warn
the driver that th ...
Fuel Distributor
Purpose, Function
Distributes fuel pumped from the high pressure fuel pump to each fuel injector.
Construction
The fuel distributor is installed to the cylinder head.
...
Other materials:
Specifications
Specifications
Engine
Electrical System
CAUTION
When cleaning the iridium plugs, do not use a wire brush. The fine particulate
coating on the iridium alloy and platinum tips could be damaged.
Lubricant Quality
NOTE
Refer to Introduction on for owner's responsibility in prot ...
Fuel Pump Unit
Purpose, Function
Supplies fuel in the fuel tank to the high pressure fuel pump.
Based on the control signal from the PCM, the fuel pump operates by the operation
of the fuel pump relay and the fuel pump control module.
Construction
2WD
The fuel pump unit is installed ...
Cooling System Cap Inspection
WARNING:
Never remove the cooling system cap or loosen the radiator drain plug while
the engine is running, or when the engine and radiator are hot. Scalding engine
coolant and steam may shoot out and cause serious injury. It may also damage
the engine and cooling system.
Tu ...
