Port fuel injection and induction system for internal combustion

Details Port fuel injection and induction system for internal combustion Port fuel injection and induction system for internal combustion

1990-01-17

1991-04-23

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Auxiliary air or gas used to inject fuel

123531, F02M 2300

Patent

active

050092120

ABSTRACT:
An air fuel injection system for an internal combustion engine includes a plurality of fuel injectors supplied with fuel from a common fuel supply and supplied with air for producing a fuel spray pattern immediately upstream of an inlet valve to the combustion bowl of one of the engines cylinders and downstream of the induction air passage which supplies combustion air to the combustion bowl. The injection air supply is provided by an integral motor pump assembly having an electric motor driving a balanced lobe vane pump. The pump motor is electrically driven to charge the fuel injectors with high pressure air before the engine is started and independent of engine operation. The balanced lobe vane pump has an inlet connected to the PVC valve of the engine to provide a oil mist lubrication of the operative wear surfaces of the vane pump and the vane pump has an inlet connected to an air manifold for supplying lower noise and pulse air pressure thereto.

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