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A self-learning method and device for engine starting fuel injection quantity

A self-learning method and engine starting technology, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problem that the engine starting fuel injection amount is not easy to calibrate reasonably

Active Publication Date: 2021-02-02
CHERY AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a self-learning method and device for engine starting fuel injection quantity, which can solve the problem that the engine starting fuel injection quantity is difficult to be calibrated reasonably

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  • A self-learning method and device for engine starting fuel injection quantity
  • A self-learning method and device for engine starting fuel injection quantity
  • A self-learning method and device for engine starting fuel injection quantity

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] The embodiment of the present invention provides a kind of self-learning method of engine starting fuel injection amount, and this self-learning method can be carried out by the on-board computer of vehicle, as figure 1 As shown, the self-learning method includes:

[0042] Step 101: Determine the temperature parameter of the vehicle according to the water tank temperature when the engine is started.

[0043] Wherein, the temperature of the water tank can be collected by the temperature sensor in the water tank, and transmitted to the on-board computer through the CAN bus of the vehicle.

[0044] Step 102: Determine the fuel injection quantity step size according to the temperature parameter, and the fuel injection quantity step...

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Abstract

The invention discloses a self-learning method and device for starting fuel injection quantity of an engine, and belongs to the technical field of engines. The self-learning method comprises the following steps that a temperature parameter of a vehicle is determined according to the temperature of a water tank when the engine is started; according to the temperature parameter, the step size of fuel injection quantity is determined, and the step size of the fuel injection quantity is the change quantity of the fuel injection quantity between two adjacent ignition cycles of the engine; and whena difference value exists between the counting number of successful combustion of the engine and the preset times of the engine, the fuel injection quantity parameter of the engine is adjusted according to the fuel injection quantity step size. The self-learning method and device for the starting fuel injection quantity of the engine solves the problem that the starting fuel injection quantity ofthe engine is not prone to being reasonably calibrated under the conditions of different fuel products and aging of a fuel system.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a self-learning method and device for engine starting fuel injection quantity. Background technique [0002] During the starting process of the car, the starter drives the engine flywheel to rotate, and at the same time, the fuel injection nozzle injects fuel and the spark plug ignites to realize the engine start. [0003] Due to the unevenness of domestic oil products, if the car is filled with fuel with poor oil quality, it is very likely that the engine will not be able to start normally under the normal calibrated fuel injection concentration. In order to solve the above problems, automobile manufacturers usually calibrate the fuel injection concentration when the automobile is started to be higher to ensure that the automobile can start normally. [0004] However, if the car is filled with fuel with good oil quality, the fuel injection concentration is too high,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/06F02D41/24F02D41/40
CPCF02D41/062F02D41/2467F02D41/40
Inventor 祁克光
Owner CHERY AUTOMOBILE CO LTD
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