Valvoline Launches Fuel System Service For Direct-Injection Systems
Valvoline engineers have developed a groundbreaking solution for treating and restoring gasoline direct-injection fuel systems with the EasyGDI Fuel System Service featuring Power Dispersal Technology.
Induction Cleaning Service For Direct-Injection Vehicles
You may have seen it before: misfire codes, stumbling and suspicious fuel trim numbers. On a scan tool, the engine may show a loss in volumetric efficiency. The driver may complain about a loss of power, poor fuel economy, hard starts and a rough idle. But this is not a 12-year-old engine; it is only
7 Reasons Direct-Injection High-Pressure Fuel Pumps Fail
Don’t be scared by direct fuel injection diagnostics. In theory, these systems operate on the same principles as port fuel injection, but direct injection can inject more precise amounts of fuel into the combustion chamber so the engine can run leaner and more efficient. The key to direct injection is a high-pressure fuel pump. This
Diagnostic Solutions: Direct Fuel Injection Systems
For veteran technicians, it’s no wonder that the internal combustion engine (ICE) has been pronounced “dead” on more than one occasion. After having gone through the gas turbine craze during the early 1960s and the rotary engine fad of the 1970s, it comes as no surprise that we’re witnessing still another resurrection of the reciprocating internal combustion engine in the form of gasoline direct fuel injection.
Audi/VW Direct-Injection Issues And Carbon Deposits
Through the years, injection systems have incorporated more sensors like air temperature, EGR temperature or exhaust gas temperature, and the emissions systems monitor how efficiently everything is working. But the systems didn’t change a whole lot until about 2006.
EGR, Secondary Air Injection And Emissions Management
EGR systems put a small amount of inert gas into the combustion chamber to control the temperatures.
What Causes Direct Fuel Injectors To Clog?
In the case of a direct fuel injector where the tip is exposed to the combustion event, carbon can stick to the nozzle and cause a bad spray pattern, because carbon searches for other carbon.
The Next Evolution Of Fuel Injection
You may soon see a vehicle that has both direct fuel injection and port fuel injection. It could be a Toyota, Ford or other make. It can be confusing because for a long time we were told that direct fuel injection was better than port fuel injection. To get the best power and economy from an engine, some engineers realized that both injection systems could be used on the same engine.
Secondary Air Injection Tips
Secondary air injection can be supplied actively from an electric air pump or passively from pulse pressure in the exhaust system. In a passive/pulse system, air is drawn in when a valve opens from vacuum created through exhaust flow. In an active system, air is blown from an electric pump, which allows for better control.
EGR And Secondary Air Injection And Emissions Management
The perfect internal combustion vehicle would be able to put the exact amount of fuel and air into the combustion chamber. If the perfect combustion event were to occur, you would get nothing more than water and carbon dioxide as byproduct. There would not be any unburned fuel or oxygen. Combustion would occur at the right temperature so oxides would not combine with nitrogen and carbon to form nitric oxides (NOx) and carbon monoxide (CO). This perfect car would not need a catalytic converter or any other emission-control device.
