Customer Usage?
1. Warming up and running distance
A long period of warm-up will waste the fuel. When the engine is cold, more fuel is required and the idling speed is high due to fast idling. Based Read more How to Diagnose your Vehicle if the Fuel Consumtion Increase? 2of 2
Fuel
How to Diagnose your Vehicle if the Fuel Consumtion Increase? 1of 2
Increased fuel consumption frequently is a result of the vehicle usage and road conditions rather than vehicle malfunction. Therefore, it is important to accurately understand the customer’s habitual Read more How to Diagnose your Vehicle if the Fuel Consumtion Increase? 1of 2
Automotive Troubleshooting Fuel System Inspection
Inspection method (gasoline engines)
Inspect the following when cranking the engine.
(1) Pinch the engine compartment fuel hose with your fi ngers and check whether or
not fuel pressure is applied.
(2) Read more Automotive Troubleshooting Fuel System Inspection
Diesel Engine Fuel Pressure Control
Determining Common-rail Fuel Pressure
A fuel pressure that matches the operating conditions of the engine is calculated according to the actual injection volume that has been determined based on the signals Read more Diesel Engine Fuel Pressure Control
Generation of Fuel Pressure in the Supply Pump
The two sets of opposing plungers are driven by the inner cam via the rollers. The inner cam is driven by the engine via the timing belt. The inside of the inner cam, which is elliptic, comes in contact Read more Generation of Fuel Pressure in the Supply Pump
Oxygen Sensor/Air Fuel Ratio Sensor Heater Control System
The detection capability of the oxygen sensor and A/F (air-fuel) ratio sensor decline at low temperatures (under 400
Gasoline Engine Fuel Injection Duration Control
The engine ECU changes the fuel injection volume by changing the injector injection duration. The actual fuel injection duration is determined by the following two items.
1. The basic injection duration Read more Gasoline Engine Fuel Injection Duration Control
Gasoline Engine Fuel Filter/Fuel Pump Filter
1. Fuel filter
The fuel filter removes dirt and impurities from the fuel that is compressed by the fuel pump.
2. Fuel pump filter
The fuel pump filter removes dirt and impurities from the fuel before Read more Gasoline Engine Fuel Filter/Fuel Pump Filter
Gasoline Engine Fuel System/ Fuel Pump and Pressure regulator
The fuel is taken from the fuel tank by the fuel pump and sprayed under pressure by an injector. The fuel pressure in the fuel line must be regulated to maintain stable fuel injection by the pressure regulator Read more Gasoline Engine Fuel System/ Fuel Pump and Pressure regulator
Gasoline Engine EFI (Electronic Fuel Injection) Fuel System
The EFI system uses various sensors to detect the engine condition and vehicle running condition. And the engine ECU calculates at the optimum fuel injection volume, and causes the injectors to inject Read more Gasoline Engine EFI (Electronic Fuel Injection) Fuel System