The CNG Reducer supplies the CNG Gas to the Engine through a locally made Air Gas Mixture which is not supplied by the CNG Kit Manufacturer; it is then fitted on the Air Intake (Inlet Manifold) of the Engine. The CNG Gas and Air mixture is sucked by the Engine which travels through the manifold and reaches inside the engine, according to its firing order.
As there is no computer control over the flow of CNG gas into car’s engine in a conventional CNG Kit, an even flow of CNG gas mixture now enters into the combustion chamber and burns with the help of the Sparks generated by the Spark plugs fitted in the Cylinder Head. If the Plugs are week then the car can Backfire, resulting in a mild explosion within the engine compartment which is released through the Air Cleaner of the car. This can often result in blowing off the Air Cleaner assembly of the car. That is why many cars are found with busted Air Cleaner assy. Another drawback is a compromise of the Engine Power (roughly 10-30%), and loss of Engine Life due to poor pick up and A/C load.
With the improvement in Engine Technologies (BS-III) little improvement in the CNG Kit technology was achieved with the introduction of Lambda Controlled System(LCS) orClose loop System & Timing Advancers(TA). A little control of the Gas flow and poor pick up can be made up with this LCS and TA that are connected with the MAP Sensor, TPS &Oxygen Sensor (Lambda sensor) fitted in the Engine & Exhaust Manifold (Silencer) of the Car.
Due to the improvement in car’s pick-up with CNG Kits fitted with LCS and TA; more users started to switch to CNG from petrol and the use of A/C on CNG was more effective without compromising performance and engine’s life. Sequential CNG Conversion Kit
Sequential CNG Kits were introduced to match the performance of EFI or MPFI car by delivering computer controlled CNG gas injection through nozzles(similar to injectors in petrol cars) which is matched to the engine’s original computer for better optimization, increased performance and power & even better fuel efficiency.
The Difference between a Sequential CNG Kit & Conventional CNG Kit is as same that of aPetrol Carburetor Car and MPFI Car. In MPFI cars the delivery and quantity of fuel is controlled by the Petrol Injectors installed in the Cylinder Head Assy.. The Injectors are connected with the Electronic Control Module (ECM) of the Car which takes signals from other sensors fitted and helps in improving the pick and mileage of the cars and helps in reduction of pollutants levels also. A Sequential CNG Kit works the same way. It has aseparate CNG gas ECM and multiple CNG Gas Injectors to control the flow and quantity of the CNG gas. These are installed just next to the petrol injectors on the engine cylinder head. CNG gas is pumped inside the engine’s combustion chamber which results in better fuel combustion resulting in better pickup, increased mileage, low engine load and no dust entry into the engine when compared to air-gas mixture installed in a conventional CNG Kit system.