CNG operated cars are increasingly
seen on roads since it is world-widely accepted as a greener fuel. Due to
rising gasoline prices; natural gas vehicles are phenomenally used in the
Asia-Pacific region, Latin America, Europe, and America.
Many gasoline internal combustion engine cars have now been converted into
bi-fuel vehicles (gasoline/CNG). The only drawback is Compressed natural gas
vehicles require a greater amount of space for fuel storage than
conventional gasoline power vehicles.
CNG has been successfully consumed by pickup trucks, auto rickshaws transit
and buses. The Indian central government has stressed that all public
transportation including buses and autos should be run on CNG. This rule has
already been implemented in cities like New Delhi, Mumbai, and Hyderabad.
Compressed Natural Gas has emission ratings that cut down on harmful
emissions by two thirds when compared to car fossil fuel emissions from
petrol and diesel fuel types.
Thus regarding the major advantages of a CNG fuel system; several
manufacturers are using the idea of natural gas power for not only small
cars but also the larger mid-size sedans and luxury cars.
The Fueling Procedure
Among the three basic types of CNG refueling
stations- Fast fueling stations that take about 5-10 mins for refueling and
are perfect for retail roadside pumps. Slow fueling stations that take from
5-8hrs to fill are ideal for a fleet of heavy vehicles which have a long
idling time. Whereas, combined Fast and Slow fueling stations can cater to
both the above mentioned categories.
CNG fueling stations could be placed alongside petrol and diesel pumps too
as CNG is generally transported to retail outlets by cylinder trucks. The
whole process requires proper infrastructure and transportation as these
trucks carry many cylinders that provide CNG to fuel stations which are not
connected by pipelines.
Many experiments have been done to operate vehicles in
dual mode like Petrol-CNG and Diesel-CNG. Some companies that initiated such
experiments on vehicles are- TELCO, Kirloskar Cummins Ltd., Ashok Leyland,
IBP, OIL, Delhi transport Corporation and Gujarat Road Transport Corporation
and got satisfactory results.
Various vehicle manufacturers were requested to nominate workshops and
undertake conversions on their vehicles by the Gas Authority of India
Limited (GAIL). To train and initiate conversion from petroleum products to
CNG; the kit suppliers from Italy and New Zealand have joined hands with oil
marketing companies and these vehicle manufacturers. While the actual
performance could be monitored by the Indian Institute for Petroleum.
The CNG kit comprise of :
- The Cylinder
- The Vapour Bag
- The High Pressure Pipe
- The Refueling Valve
- The Pressure Regulator
- The Gas-Air Mixer
- The Petrol-Solenoid Valve
- The Selector Switch
Latest CNG compatible cars in India:
- Hindustan Motors Ambassador Classic 1800 Isz Ac CNG
- Hindustan Motors Ambassador Classic 1800 Isz CNG
- Hyundai Santro Zing KX (Non AC)