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| A new LPI engine,
which enables highly precise control of LPG fuel, was developed to
improve the shortcomings of the existing LPI (mixer) system and
to respond to the nation's stricter exhaust emissions standards. |
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| The new LPI system is a new technology (a Mono-Fuel type) that liquefies LPG fuel at high
pressure and uses an injector to inject fuel into each cylinder. Among all the world's automobiles, it was first applied to New Grandeur XG. |
| Hyundai Motor Company Motor Company has succeeded in mounting the world's first LPI engine on Grandeur
XGs used as taxes. This engine has overcome all the "limitations of LPG" with respect to vehicle power performance and quality as well
as with regard to environmental concerns, a major focus of the 21st century. As a leader company attaching great importance to the
environment and its customers, Hyundai Motor Company is making every effort to fulfill its obligations toward present and future generations. |
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The electronic control unit (ECU) receives signals from various sensors, determines the engine
state, and controls the fuel pump, injector, and ignition coil to ensure an optimal air-fuel ratio and improved engine performance.
- Fuel pump : The fuel pump supplies fuel to the engine based on the engine's fuel needs at any particular time.
- Injector : Fuel is injected into each cylinder consecutively to attain an optimal air-fuel ratio. |
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| Item |
LPG (mixer type) |
LPI (liquefied injection type) |
| EMISSION |
disadvantages (including combustion and post-treatment characteristics) |
advantages (70% reduction effect) |
| power performance |
inferiority (about 80% level of MPI performance) |
superiority (about 95% level of MPI performance) |
| fuel economy |
inferiority |
equal and superior (3% more advantageous than LPG) |
| low-temperature starting performance |
Disadvantages (disadvantageous in low-temperature evaporation due to LPG characteristics) |
possible up to -25oC (equal MPI) |
| tar generation |
occurrence (disadvantageous in terms of mixture inflow route) |
seldom occurrence |
|
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1. Improved environmental protection
LPG fuel cleanness can be shown fully.
Reduced EM compared with existing mixer-type LPG systems
-Carbon monoxide: reduced by 78.1%
-Unburned hydrocarbons: reduced by 71.4% |
2. Economic impact
Energy saving from improved vehicle performance and fuel economy
Expected import replacement and export increase
Assisting small and mid-size firms with new parts development |
3. Improved technological capabilities
Liquidating old mixer technology and opening a new LPI era
Initiating mass production of the LPI system on OEM basis for the first time in the world
Securing advanced technological capabilities at least two years ahead of overseas competitors
Prior ownership of LPI-related patent rights |