1.2L REVOTRON TWIN CYLINDER CNG ENGINE 98 Don’t smoke inside or near the CNG vehicle DO NOT try to over fill the CNG tank beyond its capacity. Over filling the CNG cylinder 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 cylinder assembly should not be repaired, under any circumstance. Do not change the colour of the CNG cylinder. No flammable material should be stored in the close vicinity of the CNG cylinder. Never use naked flame / fire for checking gas leakage. Do not press the accelerator pedal while changing over from petrol to CNG mode. D. FEATURES OF CNG BI-FUEL SYSTEM: Safety: Tiago/Tigor CNG 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 On-Board 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
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