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Fuel supply device of internal-combustion engine injecting hydrogen in gas inlet channel and control strategy thereof

A technology of port injection and fuel supply, which is used in oil supply devices, engine control, internal combustion piston engines, etc.

Inactive Publication Date: 2012-06-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The correction method should not only have sufficient precision, but also take into account the limited range of pulse width, and the hardware implementation must be simple, reliable and low-cost

Method used

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  • Fuel supply device of internal-combustion engine injecting hydrogen in gas inlet channel and control strategy thereof
  • Fuel supply device of internal-combustion engine injecting hydrogen in gas inlet channel and control strategy thereof
  • Fuel supply device of internal-combustion engine injecting hydrogen in gas inlet channel and control strategy thereof

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Embodiment Construction

[0018] Such as figure 1 As shown, the system composition of the present invention includes a group of hydrogen first nozzles 1 installed above the intake manifold and a group of hydrogen second nozzles 2 located near the air intake below the intake manifold. Wherein the injection direction of the first nozzle 1 is facing the valve, and the injection direction of the second nozzle 2 forms an angle of α degree with the flow line of the intake pipe. Behind the hydrogen nozzle are hydrogen gas rails 3 and 4, and the gas rails have a certain volume to maximize the elimination of air pressure fluctuations. A hydrogen pressure sensor 5 is installed upstream of the two gas rails, and the sensor converts the hydrogen pressure signal into a voltage signal and transmits it to the engine control unit (ECU) 6 .

[0019] The specific control process is as follows: through bench tests and numerical calculations, the range of hydrogen injection at different speeds and the influence of pressu...

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Abstract

The invention relates to a fuel supply device of an internal-combustion engine injecting hydrogen in a gas inlet channel and a control strategy of the fuel supply device. the structure and the working process of the whole system are as follows: an engine control unit 6 (ECU) calculates the needed hydrogen injecting amount according to a formed calibrated by an engine pedestal on the basis of current rotary speed and load requirements; a hydrogen rail pressure sensor 5 is located on upstream pipelines of hydrogen rails 3 and 4 to feed back current pressure numerical values to the ECU; the needed hydrogen injecting pulse width can be decided by the hydrogen injecting amount and the pressure of the hydrogen rails; then permitted range of the hydrogen injecting pulse width can be inquired from the form inside the ECU according to the rotary speed of the engine and the time for injecting hydrogen is decided; at the time, the ECU judges whether the maximum hydrogen injecting pulse width of a single hydrogen injecting valve in the pulse width permitted range meets the requirement of hydrogen injecting amount or not. If so, a first nozzle 1 works; and if not, a second nozzle 2 is opened, and the needed injecting pulse width is calculated.

Description

technical field [0001] The invention relates to a fuel supply device and a control method for a hydrogen engine. The technical proposal is that each cylinder uses two solenoid valve nozzles to provide enough hydrogen, and the compensation value of the hydrogen injection pulse width is determined according to the fluctuation of the hydrogen pressure. Realize precise control of air-fuel ratio. Background technique [0002] With tightening emissions regulations and pressure from dwindling petroleum fuels, internal combustion engine researchers have been looking for clean, recyclable alternatives. With hydrogen as fuel, the product of its complete combustion is water, without pollutants such as CO, HC, and soot produced by traditional petroleum fuels, and its only emissions are nitrogen oxides produced by burning oxygen and nitrogen at high temperatures. In addition, as the issue of global warming has attracted more and more attention, it has become the consensus of all countri...

Claims

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Application Information

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IPC IPC(8): F02M21/02F02D19/02
CPCY02T10/32Y02T10/30
Inventor 孙柏刚刘福水段松伟张冬生孙大伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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