Fuel pump control device for an internal combustion engine
First Claim
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1. An engine fuel pump control apparatus comprising:
- an engine connected to a transmission;
a fuel pump interposed in a fuel conduit between a fuel tank and the engine, the fuel pump having a selectively variable fuel delivery rate; and
a fuel pump controller configured to adjust a fuel delivery rate from the fuel pump to the engine,wherein, when in a low gear position or a low vehicle speed state, the fuel pump controller increases the fuel delivery rate to a predetermined rate when a rotational speed of the engine surpasses a first engine speed threshold value,wherein, when in a high gear position or a high vehicle speed state, the fuel pump controller increases the fuel delivery rate to the predetermined rate when the rotational speed of the engine surpasses a second engine speed threshold value, andwherein the second engine speed threshold value is higher than the first engine speed threshold value.
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Abstract
An engine fuel pump control apparatus is provided. The engine fuel pump control apparatus is connected to an engine and a transmission. A fuel pump is interposed in a fuel conduit between a fuel tank and the engine and the fuel pump has a selectively variable fuel delivery rate. A fuel pump controller is configured to adjust a fuel delivery rate from the fuel pump to the engine in which the fuel pump controller is configured to increase the fuel delivery rate as a rotational speed of the engine increases. The fuel pump controller is further configured to adjust the fuel delivery rate as a detected vehicle speed characteristic varies.
9 Citations
13 Claims
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1. An engine fuel pump control apparatus comprising:
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an engine connected to a transmission; a fuel pump interposed in a fuel conduit between a fuel tank and the engine, the fuel pump having a selectively variable fuel delivery rate; and a fuel pump controller configured to adjust a fuel delivery rate from the fuel pump to the engine, wherein, when in a low gear position or a low vehicle speed state, the fuel pump controller increases the fuel delivery rate to a predetermined rate when a rotational speed of the engine surpasses a first engine speed threshold value, wherein, when in a high gear position or a high vehicle speed state, the fuel pump controller increases the fuel delivery rate to the predetermined rate when the rotational speed of the engine surpasses a second engine speed threshold value, and wherein the second engine speed threshold value is higher than the first engine speed threshold value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method to control an engine fuel pump comprising:
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controlling a fuel delivery rate of a fuel pump to an engine by; when in a low gear position or a low vehicle speed state, increasing the fuel delivery rate to a predetermined rate when a rotational speed of the engine surpasses a first engine speed threshold value, and when in a high gear position or a high vehicle speed state, increasing the fuel delivery rate to the predetermined rate when the rotational speed of the engine surpasses a second engine speed threshold value, wherein the second engine speed threshold value is higher than the first engine speed threshold value. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A control apparatus for an engine fuel pump, comprising:
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an engine connected to a transmission; a fuel tank; a means for pumping fuel interposed in a fuel conduit between the fuel tank and the engine; a means for selectively varying a fuel delivery rate; a means for controlling the fuel delivery rate to an engine by; when in a low gear position or a low vehicle speed state, increasing the fuel delivery rate to a predetermined rate when a rotational speed of the engine surpasses a first engine speed threshold value, and when in a high gear position or a high vehicle speed state, increasing the fuel delivery rate to the predetermined rate when the rotational speed of the engine surpasses a second engine seed threshold value, wherein the second engine speed threshold value is higher than the first engine speed threshold value.
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Specification