DO NOT try to over fill the CNG tank beyond its • capacity. Over filling the CNG cylinders can cause safety issues like gas leakage. Do not use high pressure washer fluid / water • jets at electrical devices & their connectors during washing. Do not try to start the vehicle, in case you • suspect any CNG leak. Do not drive the vehicle in case of CNG • leakage. CNG is inflammable and highly explosive. This may lead to serious injury. The CNG cylinders assembly should not be • repaired, under any circumstance. Do not change the colour of the CNG cylinders. • No flammable material should be stored in the • close vicinity of the CNG cylinders. Never use naked flame / fire for checking gas • leakage. Do not press the accelerator pedal while • changing over from petrol to CNG mode. 3. FEATURES OF CNG BI-FUEL SYSTEM: Safety: Vehicle complies to all prevailing Indian Regulations making the CNG Bi-fuel system robust and safe to drive. Some of the important safety features are: Automatic Regulator solenoid shut of in the • event of a crash, engine stalling and fault detection. The EMS features a low pressure side leakage • detection strategy which enables detection of gas leakages in the CNG low pressure system (downstream of CNG regulator). Fault detection of EMS and fuel supply system • with Electrical diagnosis (open / short circuit) of EMS components, compliant with India OnBoard Diagnosis (OBD) System. Functional diagnosis – regulation supervision, • engine parameters monitoring. Intelligent Fault tolerant system with limp home • mode Performance: Fully electronic sequential fuel injection system • in both gas and gasoline modes. Distributorless Pencil Coil Ignition. • Minimum power drop in CNG, close to • theoretical values. Specific ECU tuning for petrol and CNG • Independent spark advance management for • knock, drivability etc. Dual air-fuel ratio control and management • (lambda close loop control) Emission control strategies specific to petrol • and CNG. CNG fuel cut-off during decelerations • Dedicated and independent engine over speed • control Smooth transition from petrol – CNG – petrol. • Transition to petrol in case misfire is detected • in CNG mode. Accessory load compensation for smooth idle • Alternator load • Power steering load • Air conditioner load • Cooling fan load • Transition management based on • Driver’s request: Petrol – CNG- petrol • Fault diagnosis: CNG – petrol • Empty CNG tank detection: CNG-petrol • Additional Features Warm up Corrections • Mode Based transient injection control • Model based transient ignition control • Model based air/water temperature • compensation Limp home and recovery • Adaptive fuel injection control • Catalyst light-off control during engine warm up • Altitude compensation • Engine Knock Control • Fuel Pump relay Control • Post Ventilation – Fan control • 1.2L REVOTRON CNG PHASE-2 ENGINE 95
RkJQdWJsaXNoZXIy MTIwNTUz