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Injector delivery measurement with leakage correction

A fuel injector, fuel injection technology, applied in the direction of measuring devices, fuel injection pumps, fuel injection devices, etc., to achieve the effect of improving precision

Active Publication Date: 2019-01-15
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

fuel injectors are operated to perform fuel injection

Method used

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  • Injector delivery measurement with leakage correction
  • Injector delivery measurement with leakage correction
  • Injector delivery measurement with leakage correction

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Embodiment Construction

[0030] The following detailed description is merely exemplary in nature and is not intended to limit the invention disclosed herein or the application and uses of the invention disclosed herein. Furthermore, there is no intention to be bound by any principle or theory presented in the preceding technical field, background, brief summary or the following detailed description, whether expressed or implied, unless explicitly stated as being the claimed subject matter.

[0031] Such as figure 1 and figure 2 As shown, some embodiments may include an automotive system 100 including an internal combustion engine (ICE) 110 having an engine block 120 defining at least one cylinder 125 having a piston 140 coupled to rotate a crankshaft 145 . Cylinder head 130 cooperates with piston 140 to define combustion chamber 150 . A fuel and air mixture (not shown) is disposed in combustion chamber 150 and is ignited such that thermally expanding exhaust gases cause reciprocating motion of pist...

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Abstract

A method for operating a combustion engine is provided. A fuel injector is operated to perform a fuel injection, a sequence of pressure signals of the fuel rail pressure during the fuel injection is sampled and filtered and a total pressure difference between a first sample after a top dead center of the fuel pump and before the fuel injection has started and a chosen second sample after the injection and before a next pumping stroke is determined. A linear pressure slope at the second sample and a leakage pressure difference between the first sample and the second sample based on the linear pressure slope is calculated, leading to calculating an injection pressure difference as the difference between total pressure difference and the leakage pressure difference. With this, a value of a fuel quantity injected as a function of the injection pressure difference can be determined, while leakages are compensated.

Description

technical field [0001] The present invention relates generally to a method of operating an internal combustion engine of a motor vehicle, such as a diesel or gasoline engine, and more particularly to a method of determining the quantity of fuel injected by a fuel injector of the engine into a combustion chamber. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] Modern internal combustion engines, such as those used in motor vehicles, typically include a fuel injection system having a fuel pump that delivers fuel at high pressure to a fuel rail that is in fluid communication with a plurality of fuel injectors. Each fuel injector corresponds to a combustion chamber of the engine and is designed to inject a metered amount of fuel into the corresponding chamber. The injector can be designed as a solenoid valve. Typically, fuel injectors perform multiple injection pulses per ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M65/00
CPCF02M65/006F02D41/3809F02D2041/1432F02D2200/0616F02D2250/14F02M26/47F02D41/2467F02D2200/0602F02D2200/0614F02D2200/0612F02D1/06F02D41/3818F02D41/3827F02D41/3872F02D2041/286
Inventor S·尼杜A·莫拉尔
Owner GM GLOBAL TECH OPERATIONS LLC