1. AUTOMOTIVE AND ALTERNATIVE FUEL VEHICLE TECHNOLOGY
COMPRESSED NATURAL GAS VEHICLES
2. AN OLD IDEA PERFECTED Most alternative fuels are not that
new As energy markets evolve so does the demand for alternatives
Natural gas is currently emerging as a leading alternative fuel
2
3. NGV BASICS Dedicated Runs on CNG only Honda Civic,
Heavy-Duty diesel conversions Bifueled Runs on CNG or gasoline Dual
Fueled Combination of natural gas and diesel fuel LNG 3
4. FORMS OF NG Natural gas motor fuel comes as one of two
forms: Compressed Natural Gas (CNG) created by high pressure
Liquefied Natural Gas (LNG) created by low temperature Both are
made almost entirely of methane (CH4). Methane is a
hydrocarbon.
5. Vehicle Categories Choices Already Exist Light Duty Medium
Duty Heavy Duty On Road Heavy Duty Off Road CNG Options LNG Options
Heavy Duty 5
6. WHY COMPRESSED? Natural gas stored on the vehicle at 3600
psi, a few 3000 psi systems are also still in use Compressed gas is
all about fuel storage capacity onboard the vehicle By the time
fuel is metered into the engine it is running between 50 and 100
psi LNG must remain at about -260 F to remain liquid, this further
increases on vehicle storage capacity 6
7. CNG AND SAFETY Natural gas is very safe Lighter than air
Dissipates when released High ignition temperature: 1,000-1,100F
Gasoline ignition temperature: 495 Diesel ignition temperature: 410
Limited range of air/fuel combustion ratio (5-15%) Colorless,
non-toxic substance Does not leak into groundwater Comprehensive
fuel tank, vehicle and station design/manufacturing codes &
standards 7
8. CNG BASICS Tank Specialized high pressure vessel
High-pressure lines Typically stainless steel High-pressure filter
and valves Filtration and control of high pressure gas flow 8
9. CNG BASICS Regulator Drops the pressure from 3600 to about
75psi Low pressure filters One last filtration Injectors multiport
Electronic controls 9
10. BASIC CNG SYSTEM LAYOUT Whether dedicated or Bifueled CNG
systems are not complex 10
11. BASIC CNG SYSTEM LAYOUT 11
12. CNG ADVANTAGES Cheap and abundant Burns clean Domestically
produced Stable price Naturally high octane No after treatment
required for HD applications Limited processing required after
extraction Natural gas distribution is widespread 12
13. Source: AFDC 10/21/2012 U.S. Average Retail Fuel Prices
Natural Gas Consistently is the Lowest Price U.S. Average Retail
Fuel PricesCost per GGE 13
14. CNG Almost all U.S. CNG is domestic CNG is stored
indefinitely above or below ground Tank farms in most metro areas
May also be stored in wells Delivered to consumers CNG pumps at gas
stations Home equipment also available
15. NATURAL GAS PUMP
16. WHO WORKS ON THESE THINGS? 16
17. WWCC AUTO 17
18. WWCC AUTO AAS degree in Automotive Technology Certificate
in Automotive Technology Certificate in Alternative Fuel Vehicle
Technology NGV Gas/Electric Hybrid Light-Duty Clean Diesel 18
19. NGV Service and Repair High pressure Lines valves and
fittings Low pressure Computer controls Maintenance NFPA 52
Standards NGV 2 Standards EPA Standards Retrofit 19
20. WWCC AUTO 20 Research and Testing
21. FOR THOSE THAT ARE CURIOUS 21 2010 Chevrolet Suburban 2500
6.0L V8 Gasoline: 244 HP, 291 lb-ft. Torque CNG: 207 HP, 247 lb-ft.
Torque 2012 Chevrolet Silverado 1500 5.3L V8 Gasoline: 235 HP, 206
lb-ft. Torque CNG: 206 HP, 222 lb-ft. Torque
22. WORKFORCE TRAINING Classes are customized to meet the exact
needs of industry Compressed Natural Gas Vehicles CSA America
Testing CNG Fuel System Function, Diagnosis, and Repair Clean
Diesel Technology Hybrid Vehicle Technology 22
23. QUESTIONS? CONTACT ME Tracey Hind (307)382-1881
[email protected] Ken Patton (307)382-1869 [email protected]
Facebook: Western Wyoming Community College Automotive YouTube:
wwccauto 23
