Claims:1. A method of switching a fuel in a bi-fuel tank (11) in a vehicle (10), said
method comprising :
- calculating a time period of non-operational mode of said vehicle (10);
- detecting impurities in a first fuel (12) of said bi-fuel 5 tank (11) using a
sensing element (14), when said calculated time period is more than a
predefined time value;
- switching a valve (16) present in a flow path (18) connecting said bi-fuel
tank (11) to an engine (20) for a flow of a second fuel (13) into said engine
10 (20), when said detected impurities in said first fuel (12) is more than a
threshold value.
2. The method as claimed in claim 1, wherein pumping of said second fuel (13)
is into said engine (20) from said bi-fuel tank (11) using at least one pumping
15 unit (22).
3. The method as claimed in claim 1, wherein draining a first fuel (12) from a
drain hole (24) made on said bi-fuel tank (11) ,when said detected impurities
is more than said threshold value.
4. A control unit (26) in a vehicle (10), said control unit (26) adapted to :
- calculate a time period of non-operational mode of said vehicle (10);
- detect impurities in a first fuel (12) of said bi-fuel tank (11) using a
25 sensing element (14), when said calculated time period is more than a
predefined time value;
- transmit a signal to at least one pump unit (22) for pumping said second
fuel (13) into said engine (20) ;
- switch a valve (16) present in a flow path (18) connecting said bi-fuel
30 tank (11) to an engine (20) for a flow of a second fuel (13) into said engine
(20), when said detected impurities in said first fuel (12) is more than a
threshold value.
5. The control unit (26) is claimed in claim 4, wherein said sensing element (14)
is a 5 viscosity sensor.
6. The control unit (26) as claimed in claim 4, wherein said valve (16) is an
electronically controlled two-way valve.
7. The control unit (26) as claimed in claim 6, wherein said control unit (26)
operates said valve (16) for pumping any one of said fuel comprising said
first fuel (12) and said second fuel (13) based on said detected impurities.
8. The control unit (26) as claimed in claim 4, wherein said control unit (26)
15 receives an input from a dashboard of said vehicle (10) for switching of said
fuel in said vehicle (10).
9. The control unit (26) as claimed in claim 4, wherein said first fuel (12) is a
bio-diesel and said second fuel (13) is chosen from a group of fuels
20 comprising a gasoline, a diesel, a liquid petroleum gas and the like. , Description:In step S1, a time period of non-operational mode of the vehicle 10 is calculated. 5 In step
S2, a level of impurities in a first fuel 12 of the bi-fuel tank 11 is detected using a sensing
element 14, when the calculated time period is more than a predefined time value. In
step S3, a valve 16 present in a flow path 18 connecting the bi-fuel tank 11 to an engine
20 is switched, for a flow of a second fuel 13 into the engine 20, when the detected level
10 of impurities in the first fuel 12 is more than a threshold value.