[0001] ihe present subject matter relates in general to a mileage testing system, and in particular, to a mileage testing system for vehicles with an electronic fuel injection system.
BACKGROUND
[0002] Mileage testing systems are used in automobile industry to check the mileage of vehicles, such as motorbikes, cars, and trucks. Generally, to determine the mileage of the vehicle, the vehicle is run on a Multi roller test bench (MRTB) and fuel is supplied to the vehicle from an external fuel tank. Subsequently, a quantity of fuel supplied from the external fuel tank and the number of rotations of wheels are determined to calculate the mileage of the vehicle.
BRIEF DESCRIPTION OF DRAWINGS
[0003] The detailed description is described with reference to the accompanying
figures. In the figures, the left-most digit(s) of a reference number identifies the figure
in which the reference number first appears. The same numbers are used throughout
the drawings to reference like features and components.
[0004] Fig. la is a block diagram of a mileage testing system for a vehicle with an
electronic fuel injection system, in accordance with an example implementation of the
present subject matter.
[0005] Fig. lb is a block diagram of a fuel metering unit of a vehicle, in accordance
with an example implementation of the present subject matter.

[0006] Fig.2 illustrates a set-up for mileage testing of a two-wheeled vehicle with an
electronic fuel injection system, in accordance with an example implementation of the
present subject matter.
[0007] Fig. 3 illustrates a fuel metering unit of a mileage testing system in greater detail,
in accordance with an example implementation of the present subject matter.
[0008] Figs. 4a, 4b, and 4c illustrate types of fixed couplers used in the mileage testing
system, in accordance with an example implementation of the present subject matter.
[0009] Figs. 5a and 5b illustrate a perspective view of a pair of flexi couplers, in
accordance with an example implementation of the present subject matter.
[00010] Figs. 6a and 6b illustrate a pair of flexi couplers connected to a pair of fuel
hose pipes, in accordance with an example implementation of the present subject
matter.
[00011] Figs. 7a and 7b illustrate a fuel metering unit when the fuel metering unit is
coupled to vehicle, in accordance with an example implementation of the present
subject matter.
[00012] Fig. 8 illustrates a block diagram of a test bench unit for testing a vehicle, in
accordance with an example implementation of the present subject matter.
DETAILED DESCRIPTION
[00013] The present subject matter discloses a mileage testing system for vehicles with an electronic fuel injection system.
[00014] Mileage testing for vehicles in automobile industries is performed using an MRTB (Multi Roller Test Bench). The conventional mileage testing systems use an external fuel pump, an external fuel tank, and an external fuel filter to measure the fuel consumed during operation of the vehicle and uses a test bench unit for measuring distance travelled by the vehicle to estimate the mileage of a vehicle. However, specifications such as dimensions of the external fuel tank, external fuel pump, and external fuel filters may not always match with that of a vehicle model. Therefore, the usage of the external fuel pump and the external fuel filter may result in either more or

less pressure on fuel hose pipe, resulting in wrong mileage data. Further, the external fuel tank may not be cleaned properly, which may cause the presence of dust particles therein and the external fuel filter may allow the dust particles to enter the fuel injector, which may damage the fuel injector. Therefore, using the external fuel tank and external fuel filter for mileage testing may lead to damage to the fuel system of the vehicle, as fuel with dust particles may enter the fuel system of the vehicle. Moreover, conventional mileage testing systems are unable to accurately measure the amount of fuel supplied as they rely on the change in fuel volume in the external fuel tank as read from volume or level marking provided on the external fuel tank. [00015] The present subject matter discloses a mileage testing system for a vehicle. The mileage testing system includes a fuel metering unit, a test bench unit, and a controller unit. The fuel metering unit comprises a pair of couplers and a fuel flow meter. A first coupler may be coupled to a fuel tank, such as a fuel tank of the vehicle or an external fuel tank, through a first fuel hose pipe. It will be understood that connecting the first coupler to the fuel tank denotes connection of the first coupler to an outlet of a fuel pump that is generally placed in the fuel tank for supply of fuel from the fuel tank. Further, a second coupler may be coupled to a fuel injector of the vehicle through a second fuel hose pipe. The fuel flow meter may be connected to the pair of fuel hose pipes to determine the amount of fuel delivered from the fuel tank to the fuel injector of the vehicle. By using the fuel metering unit, an accurate measure of quantity of fuel delivered to the vehicle can be determined rather than relying on volume or level marking provided on fuel tanks.
[00016] In an example, the test bench unit may be a multi roller test bench machine (MRTB). The test bench unit may include a first roller and a second roller, collectively referred to as rollers, on which a drive wheel, such as a rear wheel, of the vehicle may be placed for mileage testing. In an example, the first roller may be connected to a sensing element and the second roller may be positioned axially parallel to the first

roller. The first roller and the second roller may rotate in response to the rotation of the drive wheel.
[00017] The sensing element may be a metallic part, such as a metallic pip, with its one end connected to the axle of the first roller and the other end connected to a speed sensor. In an example, the metallic pip may be formed on the first roller, which is rotated by the drive wheel of the vehicle. The rotation of the metallic pip is detected by the speed sensor thereby generating a signal due to changing magnetic flux. These signals correspond to the rotational data of the wheel. In an example, the speed sensor is a stationary proximity based magnetic speed sensor which produces a magnetic flux around it. During testing operation, when the rollers along with the sensing element complete each rotation, the sensing element may cut the magnetic flux of the speed sensor and accordingly, the speed sensor may compute the number of rotations completed over a time duration of the test and generate a signal for the controller unit. In an example, the speed sensor may be communicatively connected to the controller unit for receiving the signal from the speed sensor. In an example, the signal provides the count the number of rotations of rollers on which the wheels are rotated, based on the number of times the magnetic flux is cut. The count of a number of rotations may be further used by the controller unit for determining a notional distance travelled by the vehicle, which in turn may be used for mileage testing of the vehicle. A stopper may be used in the test bench unit to lock a non-drive wheel, such as a front wheel of the vehicle to prevent movement of the vehicle during the testing operation. [00018] The controller unit also receives, in one example, a measure of the fuel flow rate from the fuel metering unit, from which the quantity of fuel delivered from the fuel metering unit can be computed. In another example, the controller unit may directly receive a measure of the quantity of fuel delivered from the fuel metering unit. Further, the controller unit calculates a notional distance travelled by the vehicle based on the number of rotations of the rollers and estimates the mileage of the vehicle based on the fuel quantity and the notional distance.

[00019] The present subject matter addresses the problems of conventional mileage testing system for a vehicle by introducing a fuel metering unit comprising a fuel flow meter and a pair of couplers for accurate measurement of quantity of fuel consumed. The present subject matter also allows the fuel to pass through the fuel hose pipes from an internal fuel tank to a fuel injector of the vehicle, thereby avoiding the use of external fuel tanks.
[00020] The above and other features, aspects, and advantages of the subject matter will be better explained with regard to the following description and accompanying figures. It should be noted that the description and figures merely illustrate the principles of the present subject matter along with examples described herein and, should not be construed as a limitation to the present subject matter. It is thus understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and examples thereof, are intended to encompass equivalents thereof. Further, for the sake of simplicity, and without limitation, the same numbers are used throughout the drawings to reference like features and components.
[00021] Fig. la is a block diagram of a mileage testing system for a vehicle with an electronic fuel injection system, in accordance with an example implementation of the present subject matter. The mileage testing system 100, also referred to as a system 100 includes a fuel metering unit 102, a test bench unit 104, and a controller unit 106. The fuel metering unit 102 comprises a fuel flow meter (not shown in the figure) for measuring the amount of fuel delivered from a fuel tank of the vehicle to a fuel injector of the vehicle. In another example, the fuel flow meter may measure the fuel flow rate from which the amount of fuel delivered may be computed. The test bench unit 104 is used to calculate the number of rotations of rollers on which a drive wheel of the vehicle is placed for mileage testing operation. In an example, the test bench unit 104 may be an MRTB (Multi Roller Test Bench). The test bench unit 104 includes a test bench for

supporting the placement of the vehicle during the testing operation. In an example,
the test bench unit can also include sensors for calculating the number of rotation of
rollers. In one example, the test bench unit 104 may include an external fuel tank for
holding fuel that is to be supplied to the vehicle for the operation of the vehicle during
the testing operation.
[00022] The controller unit 106 may receive the amount of fuel consumed or fuel flow
rate from the fuel flow meter of the fuel metering unit 102 to determine the fuel
consumed by the vehicle during the mileage testing operation. For example, the fuel
consumed may be computed as a product of the fuel flow rate and a time for which the
fuel was delivered/ test was carried out. Further, the controller unit 106 can also receive
a signal including the count of the number of rotations of the roller from the test bench
unit 104 and can determine a notional distance travelled by the vehicle based on the
count of the number of rotations of the roller. For example, based on the radius of a
roller and a number of rotations completed by the roller, the controller unit 106 can
compute a notional distance travelled by the roller as a product of the circumference of
the roller and the number of rotations. As the roller is driven by the wheel of the vehicle,
the notional distance travelled by the vehicle will be the same as the notional distance
travelled by the roller. The controller unit 106 may then use the fuel consumed and the
notional distance travelled by the vehicle over a predetermined time period to estimate
the mileage of the vehicle. In an example, the mileage of the vehicle can be estimated
by:
Distance travelled by the vehicle (km)
Mileage (km/1) = —-—: — : :—:———
Fuel consumed by the vehicle (1)
[00023] In an example, the controller unit 106 may be a low-cost, handheld electronic device that may be used for estimating the mileage of the vehicle. The controller unit 106 may be, for example, a laptop, a personal computer, a tablet, a smart device, a mobile phone, and the like. In an example, the controller unit 106 can also perform diagnostics to sensors present in the system 100 and can help in repairing the sensors

of the system 100 without hampering the workflow of the system 100. For example, the sensors of the mileage testing system can be diagnosed through a table array (map) containing measured values. In an example, if the values shown by sensors lie in or out of a particular zone, the sensor may be classified to be faulty. In an example, the controller unit 106 can also be upgraded with smart connectivity using multiple interface(s). The interface(s) may include a variety of machine readable instructions-based interfaces and hardware interfaces, such as network interfaces, that allow interaction with other communication and computing devices, such as network entities, web servers, networked computing devices, external repositories, and peripheral devices that allows a user from a remote location to track estimated mileage, date, time, number of testing operations via a network.
[00024] Fig. lb is a block diagram of a fuel metering unit of a vehicle, in accordance with an example implementation of the present subject matter. The fuel metering unit 102 can comprise a fuel flow meter 108, fuel hose pipes 110, and couplers 112. In an example, the couplers 112 may be flexi couplers or fixed couplers. In an example, the couplers 112 may be used for connecting the fuel hose pipes 110 to the fuel tank and the fuel injector of the vehicle. It will be understood that connecting the coupler to the fuel tank denotes connection to an outlet of a fuel pump that is generally placed in the fuel tank for supply of fuel from the fuel tank and connecting a coupler to the fuel injector denotes connection to an inlet from where fuel is supplied to the fuel injector. The fuel hose pipes 110 may be connected to the fuel flow meter 108 for measuring the amount of fuel delivered from the fuel tank to the fuel injector of the vehicle through the fuel hose pipes 110.
[00025] Fig.2 illustrates a set-up for mileage testing of a two-wheeled vehicle 202 with an electronic fuel injection system, in accordance with an example implementation of the present subject matter. As has been discussed, the mileage of the two-wheeled vehicle 202, also referred to as a vehicle 202, may be estimated by receiving fuel flow rate or quantity of fuel consumed from the fuel metering unit 102 and a signal including

a count of the number of rotations of rollers using the test bench unit 104. In an example, the mileage testing of vehicle 202 with electronic fuel injection may be performed on the test bench unit 104. The test bench unit 104 may include a speed sensor 204, a sensing element 206, a first roller 208a, a second roller 208b, a test bench 210, and a stopper 212.
[00026] In an example, the test bench 210, also referred to as a bench, can act as a platform on which the vehicle 202 is placed for mileage testing. A drive wheel 214 of the vehicle may be placed on the first roller 208a and the second roller 208b, referred together as rollers of the bench 210. The rollers 208a, 208b allow the drive wheel 214 of the vehicle 302 to rotate without the vehicle 202 moving from its position during the testing operation. In an example, parameters of the rollers, such as radius and periphery or circumference of the first roller 208a and second roller 208b, may be stored in the controller unit 106, for example, in memory of the controller unit 106. The second roller 208b may be positioned axially parallel to the first roller 208a to simultaneously rotate with the first roller 208a in response to rotation of the drive wheel 214 of the vehicle 202. Thus, in one example, the first roller 208a and the second roller 208b may be in contact with opposite ends of the base of the wheel as the wheel rotates. [00027] The sensing element 206 may be a metallic part with its one end connected to the axis of the first roller 208a and the other end connected to the speed sensor 204. In an example, the metallic pip may be formed on the first roller 208a, which is rotated by the drive wheel of the vehicle. The rotation of the metallic pip is detected by the speed sensor 204 thereby generating a signal due to changing magnetic flux. These signals correspond to the rotational data of the wheel. In an example, the speed sensor 204 is a stationary proximity based magnetic speed sensor which produces a magnetic flux around it. The speed sensor 204 may be communicatively connected to the controller unit 106, for example through a wired or wireless connection. During testing operation, when the rollers along with the sensing element 206 complete a rotation, in response to rotation of drive wheel 214 of the vehicle, the sensing element 206 cuts the

magnetic flux of the speed sensor 204 and allows the speed sensor 204 to generate a signal for the controller unit 106. In an example, a count of the signal is indicative of a count of the number of rotations of rollers based on the number of times the magnetic flux is cut. In various example implementations, other types of speed sensors may also be used.
[00028] The count of the number of rotations of rollers may be sent by the speed sensor 204 to the controller unit 106 for determining a notional distance travelled by the vehicle 202 during the testing operation. Since the controller unit 106 can obtain parameters of the rollers such as radius and periphery or circumference from its memory, it can determine the notional distance travelled by the vehicle by computing a product of the number of rotations and the circumference. In an example, the stopper 212 may be used in the test bench unit 104 to lock a front wheel of the vehicle 202 to prevent any movement of the vehicle 202.
[00029] Further, the controller unit 106 may receive the fuel flow rate (to compute the quantity of fuel consumed) or quantity of fuel consumed from the fuel metering unit 102. For this the controller unit 106 may be communicatively coupled to the fuel metering unit 102, for example, or a wired or wireless connection. The quantity of fuel consumed as determined from the fuel metering unit 102 and the notional distance travelled by the vehicle 202 as determined from the test bench unit 104 are used by the controller unit 106 to estimate the mileage of the vehicle 202.
[00030] In an example, the fuel metering unit 102 can be connected to either the fuel tank of the vehicle or an external fuel tank. In the example as shown in the fig.2, the fuel metering unit 102 may be connected to the fuel tank of the vehicle, which eliminates the problems discussed earlier that may be faced by using the external fuel tank. Further, when it is connected to the fuel tank of the vehicle, since the vehicle uses its own fuel filters and pump, the specification of the fuel pump and fuel filters matches the vehicle model under test and therefore, pressure exerted on fuel hose pipes from using external pumps and filters may be avoided.

[00031] Fig.3 illustrates a fuel metering unit 102 of a mileage testing system 100 in greater detail, in accordance with an example implementation of the present subject matter. As shown in Fig.3, the fuel metering unit 102 can include a pair of fixed couplers, such as a first fixed coupler 302a for connecting to a fuel tank (not shown in figure) of the vehicle 202 and a second fixed coupler 302b for connecting to a fuel injector (not shown in figure) of the vehicle 202.
[00032] In an example, the first fixed coupler 302a and the second fixed coupler 302b are rigid in structure. The first fixed coupler 302a may be detachably coupled to the fuel tank at a first end 310a of the first fixed coupler 302a and to a first fuel hose pipe 110a at a second end 310b of the first fixed coupler 302a. The second fixed coupler 302b may be detachably coupled to the fuel injector at a proximal end 312a of the second fixed coupler 302b and to a second fuel hose pipe 110b at a distal end 312b of the second fixed coupler 302b.
[00033] Further, a fuel flow meter 108 may be connected to the first fuel hose pipe 110a and the second fuel hose pipe 110b. In an example, fuel from the fuel tank, such as a fuel tank of a vehicle or an external fuel tank, may be sent to the fuel injector through the fuel flow meter 108. In an example, the fuel injector may then introduce the fuel into an internal combustion engine, also referred to as an engine of the vehicle 202 for starting the vehicle 202. In an example, the fuel flow meter 108 can comprise an input valve 308a and an output valve 308b. The fuel flow meter 108 may be connected to the first fuel hose pipe 110a via the input valve 308a and to the second fuel hose pipe 110b via the output valve 308b. The fuel flow meter 108 can measure the amount or flow rate of fuel delivered from the fuel tank to the fuel injector of the vehicle 202. In one example, the fuel flow meter 108 is an oval gear type volumetric microflow meter. In another example, various types of fuel flow meters can be used. The fuel flow meter 108 may also include interfaces for communicating with the controller 106, for example, network interfaces or output ports. The fuel flow rate or quantity measured from the fuel metering unit 102 and the notional distance travelled

by the vehicle 202 from the test bench unit 104 may be used by the controller unit 106 to estimate the mileage of the vehicle 202.
[00034] Fig. 4a, 4b, and 4c illustrate types of fixed couplers used in the mileage testing system 100, in accordance with an example implementation of the present subject matter. Fig. 4a illustrates an example fixed coupler 402 where a rigid spout portion 410 extends from a connecting portion 408 of the fixed coupler 402 without an inclination, for example, at a straight angle to fit into a fuel hose pipe, such as the first fuel hose pipe 110a, or the second fuel hose pipe 110b. Fig.4b illustrates an example fixed coupler 404 where the rigid spout portion 410 is inclined downwards at an acute angle relative to the connecting portion 408, to fit into the first fuel hose pipe 110a or the second fuel hose pipe 110b. Fig.4c illustrates an example fixed coupler 406 where the rigid spout portion 410 is inclined downwards at right-angle relative to the connecting portion 408, to fit into the first fuel hose pipe 110a or the second fuel hose pipe 110b. [00035] In an example, instead of the fixed couplers, a pair of flexi couplers may also be used. The fixed couplers are rigid in structure and can be difficult to connect in the area surrounding the engine of the vehicle due to their inflexibility when they are connected to the fuel hose pipes. Therefore, flexi couplers may be used which are flexible in nature and are more easily accessible.
[00036] Fig. 5a and 5b illustrate a perspective view of a pair of flexi couplers, in accordance with an example implementation of the present subject matter. The pair of flexi couplers 502a, 502b includes a connecting portion 408 on one end and a flexible bellow portion 504 on another end. In an example, the flexible bellow portion 504 may be made up of an elastic material for flexibility. The flexible bellow portion 504 can make the pair of flexi couplers adaptable to connect to any vehicle models, irrespective of the geometrical restriction of the vehicles. In an example, the flexi coupler can be extended and bent as shown in 502a or can be unextended as shown in 502b. In an example, one of the flexi couplers can connect the first fuel hose pipe 110a to the fuel tank (not shown in the figure) or can connect the second fuel hose pipe 110b to the fuel

injector (not shown in the figure) of the vehicle. Further, the pair of flexi couplers 502a,502b can be easily connected to and accessible in the area surrounding the engine, due to their flexibility of connecting and disconnecting from fuel hose pipes. [00037] Figs. 6a and 6b illustrate a pair of flexi couplers 602a, 602b connected to a pair of fuel hose pipes 110a, 110b, in accordance with an example implementation of the present subject matter. According to Fig. 6a, the pair of flexi couplers, such as the first flexi coupler 602a can comprise the connecting portion 408 at the first end 310a and the flexible bellow portion 504 at the second end 310b and, the second flexi coupler 602a can comprise the connecting portion 408 at the proximal end 312a and the flexible bellow portion 504 at the distal end 312b. In Fig. 6a, the pair of flexi couplers 602a, 602b are extended and bent, thereby allowing flexibility in connecting to the fuel tank and fuel injector.
[00038] As seen from the Fig 6b, the flexible bellow portion 504 of the pair of flexi couplers 602a,602b are coupled to the pair of fuel hose pipes 110a, 110b respectively and may be unextended. In connected position, the fuel from the fuel tank flows through the input valve 308a of the fuel flow meter 108 via the first flexi coupler 602a and flows out of the output valve 308b of the fuel flow meter 108 to the fuel injector via the second flexi coupler 602b.
[00039] Thus, the flexibility of connecting and disconnecting the pair of flexi couplers 602a, 602b is more and it takes lesser time, thereby reducing fuel spillage on the ground and protects the mileage testing system from hazards. Additionally, the usage of the pair of flexi couplers 602a,602b safeguards a fuel sensor of the fuel flow meter from mechanical vibration generated while running on the test bench unit. [00040] Fig. 7a and 7b illustrate a fuel metering unit 102 when the fuel metering unit is coupled to the vehicle 202, in accordance with an example implementation of the present subject matter. Fig. 7a illustrates a coupling of a coupler, such as the second coupler 302b,602b to a fuel injector 702 of the vehicle 202. In an example, the second coupler can be a fixed coupler or a flexi coupler. The fuel metering unit 102 includes

a pair of fuel hose pipes 110a, 110b, the fuel flow meter 108, and a pair of flexi couplers 602a, 602b. The fuel flow meter 108 may be an oval gear type volumetric microtiow meter which is connected to a fuel tank, i.e., to an outlet of fuel pump of the fuel tank, (not shown in figure) using the first fuel hose pipe (not shown in figure) through its input valve 308a and to the fuel injector 702, i.e., to an inlet for fuel supply to the fuel injector, using the second fuel hose pipe 110b through its output valve 308b. The fuel flow meter 108 measures the amount of fuel delivered from the fuel tank to the fuel injector 702 of the vehicle 202. In an example, the fuel injector 702 may introduce the fuel into an internal combustion engine of the vehicle for starting the engine for the operation of the vehicle.
[00041] Fig. 7b illustrates coupling of the fuel metering unit 102 to vehicle 202, in accordance with an example implementation of the present subject matter. The flexi couplers 602a and 602b as depicted in Fig.7b and as explained previously, may be used to quickly connect/ disconnect the pair of fuel hose pipes 110a, 110b to a fuel tank 704 and the fuel injector 702. When the pair of flexi couplers 602a, 602b are connected to the pair of fuel hose pipes 110a, 110b, the fuel from the fuel tank 704 flows through the input valve 308a of the fuel flow meter 108 via the first flexi coupler 602a and flows out of the output valve 308b of the fuel flow meter 108 to the fuel injector 702 via the second flexi coupler 602b, thereby allowing the fuel flow meter 108 to measure the fuel flow rate or quantity of fuel delivered/ consumed.
[00042] Fig. 8 illustrates a block diagram of a test bench unit 104 for testing a vehicle, in accordance with an example implementation of the present subject matter. The test bench unit 104 as explained earlier includes the speed sensor 204, the sensing element 206, the first roller 208a, the second roller 208b, the test bench 210, and the stopper 212. During the testing operation, the vehicle can be tested by placing the drive wheel of the vehicle on the rollers of the test bench unit. As has been discussed earlier, when the rollers complete a rotation, in response to rotation of the drive wheel, the sensing element 206 cuts the magnetic flux of the speed sensor 204 and allows the speed sensor

204 to send a signal to the controller unit. In an example, the signal includes the count the number of rotations of rollers based on the number of times the magnetic flux is cut over the time duration of the test. In an example, the stopper 212 may be used to lock a front wheel of the vehicle 202 to prevent any movement of the vehicle 202 during the testing operation.
[00043] The test bench unit 104 may be connected to the controller unit 106 for estimating the mileage of the vehicle. The controller unit 106 may receive fuel flow rate or quantity from the fuel flow meter and the signal indicating the count of the number of rotations of the first roller 208a over a predetermined time period from the test bench unit 104 to estimate the mileage of the vehicle. In an example, the controller unit 106 may determine a notional distance travelled by vehicle 202 from the count of the number of rotations of the first roller to estimate the mileage. [00044] Therefore, as explained previously, the present subject matter discloses a mileage testing system for vehicles with fuel injection, to calculate the mileage of the vehicle. Further, the mileage testing system of present subject matter introduces fixed and flexi couplers for fuel hose pipes in the vehicles and allows the fuel to pass through the fuel hose pipes from an internal fuel tank to a fuel injector of the vehicle. The usage of the flexi couplers makes the area surrounding the engine easily accessible, due to their flexibility of connecting and disconnecting from fuel hose pipes. Additionally, a fuel flow meter used in the present subject matter allows for accurate measurement of fuel consumed for estimating mileage of the vehicle.
[00045] Although the subject matter has been described in considerable detail with reference to certain examples and implementations thereof, other implementations are possible. As such, the scope of the present subject matter should not be limited to the description of the preferred examples and implementations contained therein.

A mileage testing system (100) for a vehicle (202) with an electronic fuel injection system, the mileage testing system (100) comprising:
a fuel metering unit (102) to determine fuel consumption, wherein the fuel metering unit (102) comprises:
a first coupler (302a, 602a) to detachably couple to a fuel tank (704) of the vehicle (202) at a first end (310a) of the first coupler (302a, 602a) and to a first fuel hose pipe (110a) at a second end (310b) of the first coupler (302a, 602a);
a second coupler (302b, 602b) to detachably couple to a fuel injector (702) of the vehicle (202) at a proximal end (312a) of the second coupler (302b, 602b) and to a second fuel hose pipe (110b) at a distal end (312b) of the second coupler (302b, 602b);
a fuel flow meter (108) to determine amount of fuel delivered from the fuel tank (704) to the fuel injector (702), wherein the fuel flow meter (108) comprises an input valve (308a) and an output valve (308b);
the first fuel hose pipe (110a) connecting the first coupler (302a, 602a) with the input valve (308a); and
the second fuel hose pipe (110b) connecting the second coupler (302b, 602b) with the output valve (308b);
a test bench unit (104) comprising:
a test bench (210) on which a drive wheel (214) of the vehicle (202) is to be placed;
a first roller (208a) that is to rotate in response to rotation of the drive wheel (214); and

a speed sensor (204) to measure the number of rotations of the first roller (208a); and
a controller unit (106) to:
determine a measure of the amount of fuel delivered to the vehicle (202) over a predetermined time period from the fuel metering unit (102) and the number of rotations of the first roller (208a) over the predetermined time period from the speed sensor (204); and
estimate the mileage of the vehicle (202), wherein based on the number of rotations of the first roller (208a) the controller is to determine a notional distance travelled by the vehicle (202) to estimate the mileage.
The mileage testing system (100) as claimed in claim 1, wherein the test bench unit (104) comprises a stopper (212) to lock a front wheel of the vehicle (202) from rotating.
The mileage testing system (100) as claimed in claim 1, wherein the test bench unit (104) comprises a second roller (208b) positioned axially parallel to the first roller (208a) to rotate in response to rotation of the drive wheel (214), wherein the drive wheel (214) is to rest on the first roller (208a) and the second roller (208b).
The mileage testing system (100) as claimed in claim 1, wherein the first coupler (302a, 602a) comprises a connecting portion (408) to connect to the fuel tank (704) and either a rigid spout portion (410) to connect to the first fuel hose pipe (110a) or a flexible bellow portion (504) to connect to the first fuel hose pipe (110a).

The mileage testing system (100) as claimed in claim 1, wherein the second coupler (302b, 602b) comprises a connecting portion (408) to connect to the fuel injector (702) and either a rigid spout portion (410) to connect to the second fuel hose pipe (110b) or a flexible bellow portion (504) to connect to the second fuel hose pipe (110b).
The mileage testing system (100) as claimed in claim 4 or 5, wherein the flexible bellow portion (504) is made of an elastic material.
The mileage testing system (100) as claimed in claim 1, wherein the fuel flow meter (108) is an oval gear type volumetric microflow meter.
A fuel metering unit (102), to determine fuel consumption, wherein the fuel metering unit (102) comprises:
a first coupler (302a, 602a) comprising a first end (310a) and a second end (310b), to detachably couple to a fuel tank (704) of a vehicle (202) at the first end (310a) and to a first fuel hose pipe (110a) at the second end (310b);
a second coupler (302b, 602b) comprising a proximal end (312a) and a distal end (312b), to detachably couple to a fuel injector (702) of the vehicle (202) at the proximal end (312a) and to a second fuel hose pipe (110b) at the distal end (312b);
a fuel flow meter (108) to determine the fuel delivered from the fuel tank (704) to the fuel injector (702) of the vehicle (202), wherein the fuel flow meter (108) comprises an input valve (308a) and an output valve (308b);
the first fuel hose pipe (110a) connecting the first coupler (302a, 602a) with the input valve (308a); and

the second fuel hose pipe (110b) connecting the second coupler (302b, 602b) with the output valve (308b).
The fuel metering unit (102) as claimed in claim 8, wherein the first coupler (302a) comprises a connecting portion (408) to connect to the fuel tank (704) and either a rigid spout portion (410) to connect to the first fuel hose pipe (110a) or a flexible bellow portion (5044) to connect to the first fuel hose pipe (110a).
L The fuel metering unit (102) as claimed in claim 8, wherein the second coupler (302b) comprises a connecting portion (408) to connect to the fuel injector (702) and either a rigid spout portion (410) to connect to the second fuel hose pipe (110b) or a flexible bellow portion (504) to connect to the second fuel hose pipe (110b).