초록 ▼

A positive displacement fuel injection system for use with a combustion engine including a fuel pump (10,10′) which forms and delivers pre-metered slugs of fuel and timing fluid to unit injectors (300,300′) associated with the engine combustion chambers. The pre-metered slug of timing fluid has a pr

A positive displacement fuel injection system for use with a combustion engine including a fuel pump (10,10′) which forms and delivers pre-metered slugs of fuel and timing fluid to unit injectors (300,300′) associated with the engine combustion chambers. The pre-metered slug of timing fluid has a prescribed volume and sets the timing advance for the unit injector. The fuel pump can vary the size of the pre-metered slugs of fuel and timing fluid on a cycle-by-cycle basis.

대표청구항 ▼

A variable timing fuel injection system for intermittently injecting fuel into the combustion chamber of a cyclically operating internal combustion engine, comprising (a) fuel supply means for providing a supply of liquid fuel at low pressure and fuel slug forming means associated therewith (b) inje

A variable timing fuel injection system for intermittently injecting fuel into the combustion chamber of a cyclically operating internal combustion engine, comprising (a) fuel supply means for providing a supply of liquid fuel at low pressure and fuel slug forming means associated therewith (b) injector means adapted to be mounted adjacent the combustion chamber of the internal combustion engine and fluidically connected with fuel supply means for receiving fuel from said fuel supply means and for cyclically injecting fuel slugs under high pressure into the combustion chamber; said injector means including timing fluid receiving means for controlling the timing of fuel injection during engine operation in dependence upon the volume of timing fluid slugs received by said injector means; and (c) timing slug forming means adapted to be mounted remote from said injector means for metering slugs of timing fluid and for delivering each premetered slug of timing fluid to said injector means prior to the commencement of injection of fuel whose timing is to be controlled wherein said fuel supply means comprises pump means and said slug forming means comprise slug size control means for controlling the pump means to set the size of said timing and fuel slugs, wherein said slug size control means includes a fuel piston associated with said fuel slug forming means for forming and delivering the fuel slugs and a timing fluid piston associated with said timing slug forming means for forming and delivering the timing slugs, first movable stop means for controlling movement of said fuel piston and setting the size of the fuel slugs formed thereby, second stop means for controlling movement of said timing fluid piston and setting the size of the fuel slugs formed thereby and adjustment means for controlling each of said movable stop means on a cycle-by-cycle basis.