Title:
CONSTANT-SPEED MULTI-PRESSURE FUEL INJECTION SYSTEM FOR IMPROVED DYNAMIC RANGE IN INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO2003095823
Kind Code:
A3
Abstract:
A fuel injection system operates under substantially constant pump speed and creates multi-pressure levels by diverting the fuel flow using valve (30). Fuel pressure can be switched from one steady pressure level to another level on-demand instantly. This superimposes and overlaps typical fuel injection events in linear operating ranges under different pressure levels, significantly increasing the fuel injection dynamic range. Lower fuel injection when idle or during city driving reduces fuel consumption per mile traveled and reduces exhaust emission that causes smog in metropolitan areas. The system delivers additional power to the engine instantly at peak load on-demand, reduces idle speed with the engine running smoothly, does not change fuel tank temperature, and may enhance the life of the fuel pump.
Inventors:
HOU SHOU L (US)
Application Number:
PCT/US2003/015098
Publication Date:
December 24, 2003
Filing Date:
May 09, 2003
Export Citation:
Assignee:
TMC CO (US)
HOU SHOU L (US)
HOU SHOU L (US)
International Classes:
F02M37/04; F02D41/32; F02D41/38; F02M51/02; F02M63/02; F02M69/00; F02D33/00; F02M37/00; (IPC1-7): F02M51/00
Foreign References:
| US5727525A | 1998-03-17 | |||
| US5035223A | 1991-07-30 | |||
| US5207203A | 1993-05-04 | |||
| US6234151B1 | 2001-05-22 |
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