Fuel and air management systems supplier Stanadyne has developed an electrically driven gasoline direct injection (GDI) fuel pump, 'E-Pump Module,' as part of its approach to fuel delivery system technology based on electrification.
Powered by 24- and 48-volt vehicle architectures, the E-Pump Module is decoupled from the internal combustion engine drivetrain. This enables the fuel flow and pressure to be electrically controlled to optimise and reduce fuel consumption, as the pump speed is now independent of engine revolutions per minute.
Dr Brad Stroia, Chief Technology Officer, Stanadyne, 'Moving to an electrically powered GDI pump breaks from the standard design of connecting it to the engine for operation. This is an important innovation for hybrid vehicles. Pump operation can be reduced, or even suspended entirely, when the engine has low fuel delivery demand to improve overall vehicle efficiency.'
The E-Pump's compact, modular, and scalable design uses Stanadyne's proprietary controller and software. It is scalable for 250 bar to 500 bar fuel systems and suitable for various engine applications. The pump is compatible with E10 to E85 and M15 fuels with a top-end fueling capacity of 1,000 cc per revolution, i.e. up to 100 litres per hour.
When tested on a demonstration vehicle and compared to base 200-250 bar GDI system technology on a 2.0-litre turbo engine, emissions were reduced by up to 10%, mechanical noise emission was reduced by about nine decibels and start time improved by 0.7 seconds. Besides, the system pressures of up to 400 bar were achieved, a communication from Stanadyne said.
'Stanadyne's new E-Pump enables vehicle electrification by offering lower power absorption, a quieter noise signature, and features such as start-stop and on-demand fueling, providing higher system efficiency by decoupling vehicle accessories from the engine,' said Stroia. 'Its lower fuel consumption provides environmentally friendly emissions benefits that help reduce pollution,' he added.
Stanadyne's Electrified Gas Direct Injection Fuel Pump is the first in a line of electrified products being developed by Stanadyne to enable clean propulsion for electrified applications.