Fuel injection system
First Claim
1. A method for controlling a fuel injection system having a fuel injection pump, comprising the steps of:
- a) correcting a first basic volume of fuel fed by said fuel injection pump by using a correction value calculated to achieve a predetermined constant engine speed during at least one predetermined engine operating condition;
b) calculating a variation in said correction value corresponding to a fuel temperature at a predetermined engine load in said at least one predetermined engine operating condition;
c) determining at least one property of a current fuel based on said variation; and
d) controlling the fuel injection system based on said at least one property.
1 Assignment
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Accused Products
Abstract
A fuel injection system with a fuel injection pump. The system comprises first correction means for correcting a first basic volume of fuel fed by the fuel injection pump using a correction value calculated so as to realize a predetermined constant engine speed during at least one predetermined engine operating condition, calculation mean for calculating the variation of the correction value corresponding to the fuel temperature at predetermined engine load in the predetermined engine operating condition, and determining means for determining at least one property of current fuel on the basis of the variation. Accordingly, the system can automatically detect the properties of a fuel while driving.
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Citations
12 Claims
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1. A method for controlling a fuel injection system having a fuel injection pump, comprising the steps of:
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a) correcting a first basic volume of fuel fed by said fuel injection pump by using a correction value calculated to achieve a predetermined constant engine speed during at least one predetermined engine operating condition; b) calculating a variation in said correction value corresponding to a fuel temperature at a predetermined engine load in said at least one predetermined engine operating condition; c) determining at least one property of a current fuel based on said variation; and d) controlling the fuel injection system based on said at least one property. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A fuel injection system comprising:
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a) a fuel injection pump; b) a plurality of sensors for detecting an engine load, an engine operating condition, a fuel temperature, and an engine speed; c) an electronic control unit, including a processor being coupled to the fuel injection pump and said plurality of sensors, said processor being programmed to perform a series of calculation and signal handling steps for controlling the fuel injection pump, said calculation and signal handling steps comprising; (1) correcting a first basic volume of fuel fed by said fuel injection pump by using a correction value calculated so as to achieve a predetermined constant engine speed during at least one predetermined engine operating condition; (2) calculating a variation in said correction value corresponding to a fuel temperature at a predetermined engine load in said at least one predetermined engine operating condition; (3) determining at least one property of a current fuel based on said variation; and (4) controlling said fuel injection pump based on said at least one property determined in step (3). - View Dependent Claims (8, 9, 10, 11, 12)
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Specification