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Understanding CNG Kits

CNG Kit Prices in India: A Comprehensive Guide

Switching your vehicle to CNG can be intricate but manageable. Although the installation cost of CNG kits is high, the savings on fuel can make up for it over time. However, this transition comes with some drawbacks, including reduced engine performance and increased maintenance needs.

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Overview

According to an ICRA report, Compressed Natural Gas (CNG) is expected to become the second most popular fuel choice for passenger vehicles in India by 2027. The Ministry of Petroleum and Natural Gas also plans to set up 17,500 CNG pumps by 2030, which should enhance infrastructure and support the growing demand. CNG is not only more economical but also environmentally friendly compared to petrol and diesel. It is considered safer due to its higher auto-ignition temperature (540°C) and lower flammability, reducing fire risks.

Major automakers in India, like Maruti Suzuki, Tata Motors, and Hyundai, offer CNG-powered vehicles. Popular models include the Maruti Suzuki WagonR S-CNG, Dzire S-CNG, and Tata Tigor iCNG. If you are considering converting your vehicle to CNG, here’s what you need to know.

What is a CNG Kit?

While you can’t convert a petrol engine to diesel, you can retrofit certain petrol or diesel vehicles with a CNG kit. This allows for a switch between CNG and traditional fuel. Before installing a CNG kit, you need to obtain approval from your local Regional Transport Office (RTO).

A CNG kit converts a petrol vehicle to run on Compressed Natural Gas. It typically includes:

  • Electric Control Unit (ECU): Manages the gas flow into the engine.
  • Pressure Gauge: Monitors the gas pressure.
  • Refill Valve: Where the CNG refilling pipe connects.
  • High-Pressure Tubes: Transport gas safely.
  • CNG Tank: Stores the CNG.
  • Clamps: Secure the pipes.
  • Regulator: Controls gas pressure.

Types of CNG Kits

There are two main types of CNG kits, each with distinct pros and cons:

  1. Venturi Kit
    • Suitable for carburetted engines.
    • Cost-effective and simpler to install.
    • No need for a new ECU but requires frequent maintenance due to less precise fuel control. Cars with this kit may experience slower acceleration and more frequent stalling.
  2. Sequential Kit
    • Designed for fuel-injected engines.
    • Requires a new/remapped ECU, making it more expensive.
    • Provides better mileage and fuel economy.
    • Closed Loop System: Interacts with the Lambda sensor to regulate fuel flow and control emissions, leading to reduced performance but better environmental benefits.
    • Open Loop System: Allows unrestricted fuel flow for better performance but may result in higher emissions and potential heating issues.

Cost of CNG Kits in India

Here’s a general breakdown of CNG kit prices:

  • Factory-Fitted Sequential CNG Kit: ₹90,000 to ₹1,00,000
  • Independent/Third-Party CNG Kit: ₹40,000 to ₹50,000
  • Open-Loop Kit Setup: ₹15,000 to ₹20,000
  • Closed-Loop Kit Setup: ₹22,000 to ₹25,000

Approved CNG Kit Brands and Prices

Here are some RTO-approved CNG kits and their approximate costs:

  • Bugatti: ₹45,000
  • Unitax: ₹45,000
  • Longas: ₹42,000
  • Tomasetto: ₹40,000
  • Zavoli: ₹39,999
  • Lovato Autogas: ₹31,999
  • Bedni: ₹30,000
  • Landi-Renzo: ₹30,000
  • SKN: ₹30,000
  • BRC: ₹29,999
  • Tartarini: ₹25,000

Additional costs to consider include:

  • Registration Fees and RC Endorsement: ₹2,000 to ₹3,000
  • RTO Licence Fee: Varies by state
  • Maintenance Costs: Vary depending on repairs
  • Additional Insurance Endorsement Fee: ₹1,200 to ₹1,500

How CNG Kits Operate

A CNG kit involves installing a secondary fuel tank, usually in the trunk, to store CNG. The gas travels through high-pressure lines to the fuel injectors, which then deliver it to the engine’s combustion chamber. A pressure regulator controls the gas flow, ensuring proper engine performance.

Advantages of CNG Kits

  • Cost Efficiency: CNG-fitted cars are cheaper to run compared to diesel vehicles, with the installation cost being offset by lower fuel costs over time.
  • Fuel Economy: CNG provides better mileage compared to petrol.
  • Environmental Benefits: CNG emits fewer harmful gases, making it an eco-friendly option.
  • Safety: CNG has a higher auto-ignition temperature and is less flammable.
  • Quality Assurance: CNG is less likely to be contaminated, ensuring high fuel quality.
  • Flexibility: Ability to switch between CNG and petrol/diesel.
  • Noise and Vibration: Comparable to petrol vehicles in terms of NVH (Noise, Vibration, and Harshness).

Disadvantages of CNG Kits

  • High Installation Costs: The initial expense is significant.
  • Maintenance: Regular maintenance is required, adding to the overall cost.
  • Boot Space: Installation of a CNG tank reduces available trunk space.
  • Fuel Availability: CNG stations are less common than petrol stations, causing potential inconvenience.
  • Performance Impact: Reduced engine performance and less effective air conditioning.
  • Insurance Premium: Increased by about 10%.

Considerations Before Switching to CNG

  • Compatibility: Verify if your vehicle is suitable for a CNG conversion.
  • Quality: Ensure the CNG kit is RTO-approved and genuine.
  • Availability: Check the availability of CNG stations in your area.
  • RTO Permission: Obtain necessary approvals and update your vehicle’s registration.
  • Impact on Performance: Be aware of potential long-term performance issues and inform your insurance company.

Maintaining a CNG Kit

Regular maintenance is crucial for a CNG kit’s longevity. Key maintenance tasks include:

  • Air Filters: Clean every six months and replace annually.
  • Spark Plugs: Replace every 20,000 to 40,000 km.
  • Throttle Body: Clean every 10,000 km.
  • CNG Reducer and Filters: Replace every 20,000 to 40,000 km.
  • CNG Cylinder: Regular inspections and hydrotesting are required.

Tips for Extending the CNG Kit’s Lifespan

  • Initial Petrol Use: Start your car on petrol before switching to CNG.
  • Timely Service: Service your car before due dates.
  • Avoid Low Fuel Levels: Don’t run the car on low CNG levels for extended periods.
  • Park in Shade: Prevent CNG evaporation by parking in shaded areas.

Company-Fitted vs. Aftermarket CNG Kits

Factory-fitted CNG kits generally come with a warranty and high-quality components. Aftermarket kits, while potentially cheaper, may not offer the same level of reliability and can void the vehicle’s manufacturer warranty.

Conclusion

CNG-powered vehicles provide an eco-friendly and cost-effective alternative to petrol and diesel cars. While the initial costs and maintenance may be higher, the long-term fuel savings and environmental benefits can make it a worthwhile investment. Be sure to conduct thorough research and consider all factors before making a decision.

FAQs

The initial cost ranges from ₹50,000 to ₹60,000.

Sequential kits offer better mileage but are more expensive. Closed-loop systems are eco-friendly but reduce performance, while open-loop systems maintain performance but have higher emissions.

Factory-fitted kits cost between ₹90,000 and ₹1,00,000, while aftermarket kits cost between ₹40,000 and ₹50,000.

Yes, CNG is beneficial as it reduces engine wear and does not interfere with engine lubricants.

Yes, they offer a warranty on the entire vehicle, including the CNG kit.