Apparatus for detecting the fuel quantity delivered to the combu

Internal-combustion engines – Charge forming device – Fuel injection system

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Details

123494, 123501, 123569, 73119A, F02M 6500

Patent

active

044269811

ABSTRACT:
A fuel quantity measuring apparatus, preferably for a Diesel engine, is proposed in which the course of the fuel pressure is evaluated. A specialized pressure gradient of a first polarity marks the onset of supply or injection, and the maximum of the pressure gradient of the other polarity represents the end of injection or supply. The question of which designation prevails, whether injection onset and end or supply onset and end, is determined by the measurement location, that is, whether it is in the direction of the injection valve or in the direction of the supply element of the fuel supply pump. The injection quantity, for example, may be determined via the integral of the pressure during the metering period. It is recommended, when a piezoelectric pressure receptor is used, that a resistor-capacitor element be switched parallel thereto.

REFERENCES:
patent: 3511088 (1970-05-01), Weaver
patent: 3796197 (1974-03-01), Locher et al.
patent: 4012948 (1977-03-01), Kuno et al.
patent: 4033310 (1977-07-01), Nicolls
patent: 4130013 (1978-12-01), Bailey et al.
patent: 4279235 (1981-07-01), Flaig et al.
patent: 4337650 (1982-07-01), Brandt

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