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Bi-fuel engine using hydrogen

A technology for internal combustion engines and engines, which is applied to combustion engines, internal combustion piston engines, engine control, etc., and can solve problems such as increasing NOx emissions

Inactive Publication Date: 2009-09-16
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, hydrogen combustion is limited to operating at equivalence ratios of about 0.5 or less due to increased combustion harshness, which, if problematic, can rapidly increase NOx emissions

Method used

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Examples

Experimental program
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Embodiment Construction

[0015] figure 1 A four-cylinder internal combustion engine 10 is shown by way of example. Internal combustion engine 10 is supplied with air through intake manifold 12 and exhaust gases through exhaust manifold 14 . An intake conduit upstream of the intake manifold 12 contains a throttle valve 32 which, when activated, controls air flow to the internal combustion engine 10 . Sensors 34 and 36 installed in intake manifold 12 measure air temperature and mass air flow (MAF), respectively. Sensor 31 located in intake manifold 12 downstream of throttle valve 32 is a manifold absolute pressure (MAP) sensor. Partially closing throttle 32 causes the pressure in intake manifold 12 to drop compared to the pressure on the upstream side of throttle 32 . When there is a pressure drop in the intake manifold 12 , exhaust is forced to flow through an exhaust gas recirculation (EGR) conduit 19 connecting the exhaust manifold 14 to the intake manifold 12 . EGR valve 18 is located in EGR con...

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PUM

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Abstract

The invention relates to bi-fuel engine using hydrogen. A method for controlling an internal combustion engine is disclosed in which a first fuel, hydrogen, is supplied under a first set of engine operating conditions and a second fuel, such as: gasoline, gasoline mixed with alcohol, or gaseous hydrocarbons, are supplied under a second set of engine operating conditions. The first set of engine operating condition is below a threshold BMEP and the second operating condition is above the threshold BMEP. Alternatively, the first and second set of operating condition is based on temperature of athree-way catalyst coupled to the engine. When its temperature is greater than its light-off temperature, the second fuel is used.

Description

technical field [0001] The present invention discloses a method of operating an internal combustion engine supplied with both hydrogen fuel and another fuel. Background technique [0002] Because of the focus on greenhouse gases emitted from carbonaceous fuels such as gasoline, diesel, and alcohol-based fuels, there has been intense interest in motor vehicles fueled with hydrogen that produces water upon combustion. Since hydrogen is a gaseous fuel occupying a large volume in the cylinder, especially compared to dense fuels like gasoline or diesel fuel, hydrogen fueled internal combustion engines experience lower power output compared to gasoline or diesel powered engines. Furthermore, hydrogen combustion is limited to operation at equivalence ratios of about 0.5 or less due to increased combustion harshness, which, if problematic, can rapidly increase NOx emissions. An equivalence ratio of 1 is stoichiometric, meaning that the ratio of fuel to air is such that all the oxyg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/06F02D41/26
CPCF02D19/0692F02D19/0615F02D19/084F02D19/0644F02D19/061F02D19/081Y02T10/36F02D19/0689Y02T10/30
Inventor 帕特里克·约瑟夫·菲利普斯威廉·弗朗西斯·施托克豪森
Owner FORD GLOBAL TECH LLC