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Automobile fuel control method and controller

A technology of fuel control and controller, which is applied in the field of control of fuel injection volume of cylinder injectors of automobile engines, can solve problems such as inaccuracy and complex fuel applicable parameters, and achieve the effect of reducing resource waste and manual misjudgment

Active Publication Date: 2012-01-04
SANMENXIA SUDA TRANSPORTATION ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies or deficiencies of the prior art, the purpose of the present invention is to provide an automobile fuel control method to solve the shortcomings of the existing controllers that are relatively complicated and imprecise in manual control of cold start and modification of applicable fuel parameters.

Method used

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  • Automobile fuel control method and controller
  • Automobile fuel control method and controller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The controller of this embodiment includes a main control unit, a temperature measuring circuit and a mode switching switch; the main control unit includes a signal input circuit, a shaping circuit, a processing module and a driving circuit connected in sequence, and the mode switching switch is connected to the processing module ; The temperature measurement circuit is connected to the processing module;

[0031] The above signal input circuit includes a resistor R1 and a capacitor C1. One end of the resistor R1 and one end of the capacitor C1 are connected to the car computer in line with each other to obtain the original fuel injection pulse signal output by it. The other end of the resistor R1 is connected to +12V, and the other end of the capacitor C1 is grounded. ;

[0032] The above shaping circuit includes chip U1, resistor R2 and capacitor C2. Chip U1 is a HCPL-M611 photoelectric coupling chip. Pin 1 of chip U1 is connected to one end of resistor R2. Both resis...

Embodiment 2

[0042] The controller in this embodiment is provided with a sub-control unit on the basis of the controller in Embodiment 1, and the components and circuits in the sub-control unit are the same as those in the main control unit, and the sub-control unit The 24 pins and 25 pins of the chip U2 in the main control unit are connected to the 24 pins and 25 pins of the chip U2 in the main control unit, and the 14 pins of the chip U2 in the sub control unit are connected to one end of the external switch for mode switching . Among them, the main control unit and the sub-control unit respectively control the fuel injection quantity of the two cylinder injectors of the automobile engine. The main control unit and the auxiliary control unit perform synchronous control work:

[0043] The main control unit and the sub-control unit receive the mode control switch command;

[0044] When the fuel is gasoline, the chip U2 in the main control unit and the sub-control unit does not do any pro...

Embodiment 3

[0047] The controller in this embodiment is provided with three sub-control units on the basis of the controller in embodiment 1, and the components and circuits in the three sub-control units are all communicated with the components and circuits in the main control unit. The three sub-control units are respectively the first sub-control unit, the second sub-control unit and the third sub-control unit, the pins 24 and 25 of the chip U2 in the first sub-control unit are connected with the pins 24 and 25 of the chip U2 in the main control unit. Pins and 25 pins are connected correspondingly, 24 pins and 25 pins of the chip U2 in the second sub-control unit are connected with 24 pins and 25 pins of the chip U2 in the main control unit, and the chip U2 in the third sub-control unit The 24 pins and 25 pins of the main control unit are connected with the 24 pins and 25 pins of the chip U2 in the main control unit, the 14 pins of the chip U2 in the first sub control unit are connected...

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Abstract

The invention discloses an automobile fuel control method and controller. The control method provided by the invention is characterized in that the controller effectively controls engine fuel injection quantity on the premise of not changing an automobile computer and adjusts the fuel injection quantity by intercepting an oil injection impulse signal from an ECU (electronic control unit) of the automobile computer so as to keep the air-fuel ratio Lambada of a car to be within 1+ / -0.03 and ensure flexible and efficient startup and stable operation of the car in the event that different types of fuels are used. The controller comprises a signal input circuit, a shaping circuit, a processing module and a drive circuit mode handover switch, wherein the signal input circuit, the shaping circuit, the processing module and a drive circuit are sequentially connected together; the mode handover switch is connected with the processing module; and a temperature-measuring circuit is connected with the processing module. The controller also comprises at least one subcontrol unit which is connected with a main control unit and is used for controlling a plurality of air cylinders. The control method and controller provided by the invention have the advantages of reasonable design, high reliability, strong practicability and the like, thus being applicable to popularization and use in flexible fuel vehicles.

Description

technical field [0001] The invention belongs to the technical field of controlling the fuel injection quantity of a cylinder fuel injector of an automobile engine, and in particular relates to an automobile fuel control method and a controller. Background technique [0002] The existing fuel control is generally composed of pure electronic circuits without using an integrated microprocessor, and a relay is used as a mode selection switch and a cold start switch in the device, and the fuel control mode is selected by opening and closing the relay; an external switch is used for cold start The control relay is kept on for a period of time, and the injector injects fuel continuously to ensure startup. The fuel injection pulse electric signal passes through the LM139JS voltage comparator to adjust the width of the pulse signal, amplifies and outputs to the fuel injector. There are two major flaws in this type of controller: [0003] (1) The scope of application is small. If th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/06F02D41/30
CPCY02T10/36Y02T10/30
Inventor 刘生全马荣贵马志义赵勇涛
Owner SANMENXIA SUDA TRANSPORTATION ENERGY SAVING TECH
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