Measuring and testing – Internal combustion engine or related engine system or... – Compression
Patent
1982-07-19
1984-05-15
Myracle, Jerry W.
Measuring and testing
Internal combustion engine or related engine system or...
Compression
73252, G01M 1500
Patent
active
044480660
ABSTRACT:
Apparatus for indicating fuel per pulse in a pulsed fuel injection system for an internal combustion engine, especially a diesel engine, includes a magnetic piston axially movable in a cylindrical bore in a fuel line to and from a stopped position blocking an inlet. The piston has an outer diameter just smaller than the inner diameter of the bore and is included in a magnetic circuit including an actuating coil having an inductance varying with piston position. Circuitry provides strong electrical current pulse to the coil prior to injection to move the piston to its stopped position and then provides a substantially weaker AC current to the coil while monitoring the voltage and rate of change of voltage thereacross. The rate of change of voltage indicates when piston movement in response to a fuel injection pulse ceases; and the voltage at that point indicates piston position and therefore fuel quantity injected. The beginning of piston movement, as sensed from said voltage, may also be used to mark time of injection.
REFERENCES:
patent: 3847020 (1974-11-01), Jurschak
patent: 4328697 (1982-05-01), Tumber et al.
Romblom Edward R.
Sundeen Arthur R.
General Motors Corporation
Myracle Jerry W.
Sigler Robert M.
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