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US 2008/0289608 A1Published application
Fuel injector control apparatus
AssigneeDenso Corporation
InventorsYuichiro Matsuura, Toyoji Nishiwaki
Life of this patent
Estimating the term…
Abstract
A microcomputer calculates a fuel injection time. When the fuel injection time is longer than a predetermined specified time, the microcomputer sets a voltage level of a short-term injection signal to high and sets a peak current for coils in fuel injectors to a first peak current. When the fuel injection time is shorter than or equal to the predetermined specified time, the microcomputer sets a voltage level of the short-term injection signal to low and sets a peak current for the coils to a second peak current smaller than the first peak current.
Claims17
A fuel injector control apparatus comprising:
- a peak value setting means for determining whether a predetermined setup condition is true or false, assigning a first current value to a peak value of a current to be supplied to a coil provided for a fuel injector for injecting fuel so as to generate an electromagnetic force for opening the fuel injector when the setup condition is false, and assigning a second current value smaller than the first current value to the peak value when the setup condition is true;
- and
- a current supply means for supplying the coil of the fuel injector with a current equivalent to the peak value specified by the peak value setting means in accordance with an open instruction for opening the fuel injector.
Dependencies are inferred from the claim text.