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Electronic control system of quasi-homogeneous charge-pneumatic-hydraulic dual-fuel engine with multi-point injection

A dual-fuel engine, homogeneous charge technology, used in combustion engines, engine control, internal combustion piston engines, etc., can solve the problems of high price and loss of voice, and achieve the goal of improving response speed, reducing time difference and improving control effect. Effect

Active Publication Date: 2019-08-16
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most domestic engine manufacturers carry out technical improvement and product development through the introduction of foreign electronic control systems. However, foreign manufacturers often adopt the bundling sales model of electronic control systems and calibration software due to their advantages in core electronic control technology, which is expensive and loses the right to speak

Method used

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  • Electronic control system of quasi-homogeneous charge-pneumatic-hydraulic dual-fuel engine with multi-point injection
  • Electronic control system of quasi-homogeneous charge-pneumatic-hydraulic dual-fuel engine with multi-point injection
  • Electronic control system of quasi-homogeneous charge-pneumatic-hydraulic dual-fuel engine with multi-point injection

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Such as Figure 3-4 As shown, the output terminal of the engine working condition acquisition sensor is connected to the input terminal of the ECU, and the output terminal of the control unit is connected to various solenoid valves and switches. The above-mentioned control unit is MC9S12XET256MAL, and the single-chip microcomputer module includes Flash program memory, EEPROM data memory, serial communication port, CAN, I / O channel port, interrupt system, A / D converter, watchdog and programmable PIT timer / Modules such as counters, among which the functional modules include digital acquisition module, power drive and protection module, power supply module and display and alarm module.

Embodiment 2

[0048] Such as Figure 5 As shown, the microprocessor control module built in the ECU is composed of crystal oscillator, memory RAM, ROM and reset circuit. The basic function of the reset circuit is: when the system is powered on, it can provide a reset signal. Quickly cancel the reset signal. In addition, after the power supply is stable, the reset signal needs to be canceled after a certain delay time, so as to prevent the power switch from jittering during the opening-closing process, which will affect the reset and reduce reliability and stability. The reset circuit designed by the present invention adds a diode to the basic reset circuit. The purpose is that when the power is cut off, the capacitor will discharge rapidly through the diode. When the power is restored, it can be automatically reset by power-on. , to improve reliability.

Embodiment 3

[0050] The analog signal acquisition part of the engine working condition acquisition sensor is an RC filter circuit composed of capacitors and resistors. The input end of the filter circuit obtains the feedback information of coolant temperature, fuel temperature, accelerator pedal position, throttle position, and battery voltage, among which the temperature signal and accelerator The pedal signal needs to be pre-processed and then input to the filter circuit.

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Abstract

The invention provides a multi-point injection quasi-homogeneous charge pressure gas-liquid dual-fuel engine electronic control system. The system comprises a fuel gas pressure reduction channel, an oil passage, a fuel injection device, an engine air cylinder and a control unit, wherein the fuel gas pressure reduction channel is connected with the fuel injection device and outputs the gas after pressure reduction treatment to the fuel injection device; the oil passage is connected with the fuel injection device and outputs fuel to the fuel injection device; when an engine is in a air cylindercompression stroke, the fuel injection device sprays the fuel into the air cylinder by an oil nozzle before a piston reaches an upper stop point; when the engine is in the air inlet stroke of the aircylinder, and the fuel injection device fills the air cylinder with the fuel gas; the control unit comprises an ECU, a valve control module and an engine working condition acquisition sensor; the ECUdetermines the injection time of the fuel and the fuel gas and the injection volume of the fuel and the fuel gas according to an engine working condition. According to the system, a natural gas-dieseldouble-fuel engine adopted can accurately control the air inlet amount, the fuel injection amount and a natural gas supply amount, and a reasonable fuel supply strategy are formulated.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an electronic control system for a quasi-homogeneous charge-pneumatic-hydraulic dual-fuel engine with multi-point injection. Background technique [0002] According to the "China Motor Vehicle Environmental Management Annual Report" data released by the Ministry of Ecology and Environment in 2018, motor vehicle pollution has become an important source of air pollution in my country and an important cause of ambient air pollution. In particular, diesel vehicles, which account for only 7.8% of the vehicle population, emit 57.3% of NOx and 77.8% of PM, which is the top priority of motor vehicle pollution prevention and control. Research, development and application of natural gas-diesel dual-fuel engines are considered to be one of the effective ways to solve diesel engine energy saving and emission reduction. The HCCI natural gas / diesel dual-fuel engine electronic control system t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B69/04F02M21/02F02D41/30F02D19/08
CPCF02B69/04F02D19/08F02D41/30F02M21/0218F02M21/0248Y02T10/12Y02T10/30
Inventor 彭育辉汤家有黄育鹏
Owner FUZHOU UNIV