Processor based fuel injection control system
This patent describes a fuel injection system, for an internal combustion engine. It comprises: a charge pump with a drive rotor, reciprocating pumping means with a pumping cycle with an intake stroke to receive an intake charge of fuel and a pumping stroke to deliver fuel for fuel injection, and cam means to reciprocate the pumping means, the cam means and pumping means being relatively rotatable by the drive rotor to provide periodic pumping cycles of the pumping means at a rate proportional to the relative rotation; electrical valve means having open and closed positions and which, in the open position thereof, is operable to supply fuel to the charge pump during its intake stroke and to spill fuel from the charge pump during its pumping stroke, the electrical valve means being selectively electrically operable for opening and closing the valve means; and a processor based control system actively governing the electrical operation of the valve means to regulate the fuel injection timing and quantity in accordance with certain engine and pump data. This patent describes improvement in the processor based control system comprising pump rotation measuring means for generating a pump clocking pulse for each predetermined increment, less than one degree, of the relative rotation, reference means for establishing a predetermined reference point of each pumping cycle, and processor based valve governing means for counting first and second preset counts of the pump clocking pulses for each pumping cycle.
- Assignee:
- Stanadyne Automotive Corp., Windsor, CT (United States)
- Patent Number(s):
- US 5103792; A
- Application Number:
- PPN: US 7-598035
- OSTI ID:
- 5105368
- Resource Relation:
- Patent File Date: 16 Oct 1990
- Country of Publication:
- United States
- Language:
- English
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