BS4 vs BS6 Engine - Major Differences

What are Bharat Stage Emissions Norms?

Bharat Stage (BS) emission standards are regulations introduced by the Government of India to control air pollutant output from internal combustion engines. 

Managed by the Central Pollution Control Board, these standards dictate permissible levels of harmful emissions such as Nitrogen Oxide (NOx), Carbon Monoxide (CO), and Particulate Matter (PM).

What Is BS4 (BSIV)?

BS4, or Bharat Stage IV, was the emission standard followed in India before BS6. These Bharat Stage 4 norms were mandated nationwide in April 2017. A BS4 engine relies on standard fuel injection and exhaust treatment systems, permitting higher emission levels of harmful gases compared to its successor.

Its key features are:

1. Lower emission standards than BS6
2. Higher sulphur content in fuel
3. Uses a bS4 engine with comparatively simpler emission systems 

What is BS6 (BSVI)?

The BS6 meaning refers to the sixth stage of Bharat's emission standards, introduced to significantly reduce vehicle pollution. A BS6 engine features advanced exhaust treatment technologies that drastically lower tailpipe emissions. 

Its Key features are:

1. Much stricter emission limits
2. Ultra-low sulphur fuel
3. Advanced exhaust treatment technology

With both standards explained, let us compare them side by side.

Difference Between BS4 and BS6 Engine

Understanding the key difference between BS4 and BS6 helps highlight the major mechanical and technological upgrades in modern vehicles.

Apart from technology, emission levels are the biggest point of comparison in BS4 vs BS6.

Pollution Emission Norms BS4 vs BS6

The main purpose of moving from BS4 to BS6 was reducing vehicle pollution levels. BS6 norms introduced tighter limits for harmful gases and particulate emissions. The transition from BS4 to BS6 brought massive reductions in harmful vehicular pollutants:

• NOx Emissions: Reduced by 25% in petrol engines and 68% in diesel engines.
• Particulate Matter (PM): Reduced by 80% in diesel vehicles.
• Cleaner Fuel: Ultra-low sulphur fuel (10 ppm) reduces overall toxic atmospheric output.

These improvements make BS6 vehicles more environmentally friendly compared to BS4 models. To achieve such low emission levels, sophisticated engineering components are required.

How Does a BS6 Engine Work?

A BS6 engine combines cleaner BS6 fuel with advanced engine management systems and emission-control technologies to ensure that fewer pollutants are released into the atmosphere.

It works by:

1. Using low-sulphur BS6 fuel
2. Improving fuel combustion
3. Filtering harmful particles
4. Reducing nitrogen oxide emissions
5. Monitoring emissions using advanced sensors

The benefits of BS6 are also visible in alternative fuel vehicles. Moving on, let's see how the BS6 engines have impacted CNG cars.

Impact of BS6 on CNG Cars

BS6 norms also affected CNG vehicles by introducing stricter emission requirements and improved engine management systems. 

Since CNG is already a cleaner fuel than petrol and diesel, combining it with BS6-compliant technology has further reduced vehicle emissions while improving engine efficiency. 

Some key impacts of BS6 on CNG cars include:

1. Lower tailpipe emissions compared to older CNG vehicles
2. Improved combustion for better fuel efficiency
3. Enhanced engine performance and smoother driving
4. Better compliance with stricter emission regulations
5. Reduced environmental impact due to cleaner exhaust gases
6. Advanced sensors for improved engine monitoring
7. Lower long-term contribution to air pollution

For buyers considering eco-friendly vehicles, BS6-compliant CNG cars provide a practical option by combining lower running costs with cleaner emissions and compliance with the latest environmental standards.

Choose Cleaner Vehicles and Smarter Protection

Understanding the BS4 vs BS6 engine comparison helps vehicle owners know the technology, emission standards, and maintenance requirements of their cars. BS6 engines offer improved emission control and comply with current regulatory standards.

When purchasing or insuring a vehicle, details such as engine type, fuel system, and vehicle specifications can influence coverage requirements. Insurance providers like Jio Insurance Broking Ltd help customers understand suitable car insurance options based on their vehicle details and ownership needs.