BG Products Develop Solution for GDI Engines
March 2, 2015
Gasoline Direct Injection (GDI) engines offer increased fuel economy, power and performance, all while reducing emissions. As a result, many manufacturers are turning to GDI to meet stringent fuel economy and emissions requirements. However, as with most complex technologies, with the benefits, complications may occur. BG has a two-pronged solution - the Clean Up and the Keep Clean.
In a GDI engine, petrol is sprayed directly where the combustion chamber is the hottest (instead of in the air intake), allowing for more thorough, even combustion. GDIs have accurately controlled emissions levels, more aggressive ignition timing curves, and more precise control over fuel and injection timing.
New vehicles with GDI engines have seen significant performance and mpg losses, ignition failures and fouled injectors in as early as 3,000 miles (4,800 km) and, potentially, holes from carbon burned in the structure of the catalytic converter in as early as 50,000 miles (80,000 km)!
What’s causing all these GDI engines to have complications so soon?
Poor air quality
In most environments, intake air is dirty due to pollution, and with modern exhaust gas recirculation systems and crankcase vent systems—and without port injectors spraying fuel (and the detergents that it contains) onto the valves—GDI components can get filthy over the course of many thousand miles.
GDI engines run at much higher cylinder pressures, which in time, can pass by the piston sealing rings. The heat and pressure released into the crankcase accelerates oil vaporisation and eventually distributes oil droplets onto the intake valves. Thus, intake valves collect deposits and in as little as 10,000 miles (16,000 km), they can bake on and cause a decrease in power and poor driveability. Since inception, GDI engines have had known problems with coking—buildup of cooked fuel deposits that foul injectors.
The high operating temperatures of GDI engines can lead to engine oil evaporation. Oil vapours circulating in the cooler regions of the engine create deposits and pooling. Some of those areas include intake boots, valves, piston crown, head squish area and catalytic system.
In a port fuel injection engine, these droplets are “washed off” the intake valves by a constant stream of fuel. However, a GDI engine does not have that advantage because the injectors spray inside the cylinders.
Deposits are like a sticky coating of oil that forms especially on the intake ports and valves. Carbon buildup on the backsides of valves can result in reduced airflow.
A combination of sticky deposits and oil evaporation can lead to carbon buildup in several places in the engine. These sticky deposits can be cooked to diamond hard deposits and can dislodge and cause damage to turbochargers, catalytic converters, etc. These hard deposits can also cause irreversible cylinder scoring.
BG has the solution - the Clean Up and the Keep It Clean
The Clean Up - BG Gasoline Direct Injection Cleaner Part 1 and 2
BG Gasoline Direct Injection Cleaner, Product codes 271 and 272, is a two-part process formulated to quickly soften and disperse baked-on deposits, which accumulate on the intake valves of direct-injected engines. With these products, the technician can remove harmful deposits without the complete disassembly that’s typically required.
And the Keep It Clean - the BG GDI Performance Service
- BG EPR™ Engine Performance Restoration, PN 109, softens and dissolves hard-to-remove deposits from piston rings.
- BG MOA,® PN 110, engine oil supplement prevents engine oil thickening under even the most severe driving conditions.
- BG 44K,® PN 208, fuel system cleaner quickly and effectively cleans the entire fuel system.
Together these three products have been proven to keep GDI engines clean and prevent potential complications. So when manufacturers turn to new, complex technologies like GDI for better fuel economy and lower emissions, BG seizes the opportunity to make GDI engines last longer and perform even better so that drivers can enjoy the significant benefit of these highly complex engines.
To request a call from one of the BG Team, Experts in the field of restoring compression and protecting engine life just ask us to give you a call back or call us on 01284 777934.
Last updated: June 3, 2015 @ 13:21 PM