We claim:
1. A method to increase the combustion efficiency of a turbocharged Internal Combustion
Engine (ICE) (100) comprising an air filter (105), an inlet valve (108), an exhaust valve (109),
turbines of turbocharger (106,114), an intercooler (103), an Electronic Control Unit (ECU) (117),
plurality of input sensors, plurality of actuators and an intercooler bypass valve (102) connected
across said intercooler (103), actively based on the coolant temperature of intercooler (103) and
intake air temperature and thereby to reduce the hydrocarbon emission at the time of cold start,
the method comprising the steps of:
obtaining data of temperature of air at intake manifold (115) of the said ICE (100) , temperature of the coolant at said intercooler (103) and various input data by means of coolant temperature sensors, boost temperature cum pressure sensors (101) and plurality of input sensors provided within the ICE (100);
determining if the ICE (100) is at cold start condition by matching said input data of temperature of air at intake manifold (115) of the said ICE (100), the temperature of coolant at said intercooler (103) and said various input data with predefined threshold values for the same stored in ECU (117) by means of said ECU (117);
activating said intercooler bypass valve (102) by opening completely by means of an electronic actuator controlled by said ECU (117) until said input data achieve their said threshold values;
monitoring data of temperature of air at intake manifold (115) of the said ICE (100), temperature of the coolant at said intercooler (103) by means of coolant temperature sensors, boost temperature cum pressure sensors (101) and various input data from said plurality of input sensors provided within the ICE (100) with respect to predefined threshold values for the same stored in ECU (117) by means of said ECU (117); and
deactivating said intercooler bypass valve (103) by closing completely by means of an electronic actuator controlled by said ECU (117) when said data of temperature of air at intake manifold (115) of the said ICE (100), the temperature of coolant of said intercooler (103) and various input data obtained from said plurality of sensors reach their said threshold values.
2. The method as claimed in claim 1, wherein said various input data comprise of engine speed and ambient pressure.
3. The method as claimed in claim 1, wherein said ICE (100) is provided with a Malfunction Indicator Lamp (MIL) to detect any failure in said intercooler bypass valve (102).
4. The method as claimed in claims 1-3, wherein said activation and deactivation of said intercooler bypass valve (102) is carried out by means of a dc torque motor control system along with an intercooler bypass valve actuator relay (118).

5. The method as claimed in claims 1-4, wherein said ICE (100) is provided with an Emission Gas Recirculation (EGR) valve (107) with electronic actuator controlled by the means of said ECU (117).
6. The method as claimed in claims 1-5, wherein said ICE (100) has plurality of turbochargers, intercoolers and intercooler bypass valves.
7. A system to increase the combustion efficiency of a turbocharged Internal Combustion Engine (ICE) (100) comprising an air filter (105), an inlet valve (108), an exhaust valve (109), turbines of turbocharger (106,114), an intercooler (103), an Electronic Control Unit (ECU) (117), plurality of input sensors, plurality of actuators and an intercooler bypass valve (102) connected across said intercooler (103), actively based on the coolant temperature of intercooler (103) and intake air temperature and thereby to reduce the hydrocarbon emission at the time of cold start, wherein said ECU (117)
initiates coolant temperature sensors, boost temperature cum pressure sensors (101) and plurality of input sensors provided within the ICE (100) to obtain data of temperature of air at intake manifold (115) of the said ICE (100), temperature of the coolant at said intercooler (103) and various input data;
determines if the ICE (100) is at cold start condition by matching said input data of temperature of air at intake manifold (115) of the said ICE (100), the temperature of coolant of said intercooler (103) and said various input data with predefined threshold values for the same stored in said ECU (117);
commands an electronic actuator to activate said intercooler bypass valve (102) by partial opening until said input data achieve their said threshold values;
monitors data of temperature of air at intake manifold (115) of the said ICE (100), temperature of the coolant at said intercooler (103) by means of coolant temperature sensors, boost temperature cum pressure sensors (101) and various input data from said plurality of input sensors provided within the ICE (100) with respect to predefined threshold values for the same stored in ECU (117); and
commands electronic actuator to deactivate said intercooler bypass valve (103) by closing completely when said data of temperature and pressure of air at intake manifold (115) of the said ICE (100), the temperature of coolant at said intercooler (103) and various input data obtained from said plurality of sensors reach their said threshold values.
8. The system as claimed in claim 7, wherein said various input data comprise of engine speed and ambient pressure.
9. The system as claimed in claim 7, wherein said ICE (100) is provided with a Malfunction Indicator Lamp (MIL) to detect any failure in said intercooler bypass valve (102).

10. The system as claimed in claims 7-9, wherein said activation and deactivation of said intercooler bypass valve (102) is carried out by means of a dc torque motor control system along with an intercooler bypass valve actuator relay (118).
11. The system as claimed in claims 7-10, wherein said ICE (100) is provided with an Exhaust Gas Recirculation (EGR) valve (107) with electronic actuator controlled by the means of said ECU (117).
12. The system as claimed in claims 7-11, wherein said ICE (100) has plurality of turbochargers, intercoolers and intercooler bypass valves.