Fuel supply control apparatus for bi-fuel internal combustion engine, and method of switching fuel in bi-fuel internal combustion engine
US9695756B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Nov 27, 2012 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Jan 25, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
When switching the fuel to be used for engine operation from gasoline to CNG, in a state where CNG is supplied experimentally to one cylinder serving as a judgment object and gasoline is supplied to other cylinders, whether or not CNG can be supplied to the cylinder serving as a judgment object is judged based on an amount of change ΔPc in fuel pressure inside a CNG delivery pipe (Step S13 to Step S16). When it is judged that a gas fuel can be supplied to all cylinders (Step S19: YES), the fuel to be used for engine operation is switched from the liquid fuel to the gas fuel (Step S20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.