We Claim:
1. A Pneumatic Pressure Sensor (PPS) for vehicles comprising of:
- a means to sense the deformation in side walls or distance between wheel and crown portion of tyre;
- a means to capture details of deformation or distance;
- a means for transmitting the same information to ECU which further sends signal to the dashboard after processing the same information.
2. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 1, wherein said means to sense deformation or distance comprises of a flexible wire loop (7) of whose one end is fixed to a housing (5); said wire loop passes through supporting wire notch at the inner side of the crown portion of the tyre (8) and free end of said wire loop is passed through receptors (6) to capture details of deformation or distance.
3. The Pneumatic Pressure, Sensor (PPS) for vehicles as claimed in claim 2, wherein said wire loop can be reoriented in different directions even perpendicularly and it should have inflexible sides.
4. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 2, wherein an electrical circuit is connected to said receptors so that once the free end touches any of the receptor the circuit is closed and accordingly the signal is sent to indicator on dashboard.
5. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 2, wherein at least two indicators per tyre are provided on the display board to show acceptable pressure and unacceptable pressure. ' !
6. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 1, wherein said means to sense deformation or distance are Sensors/trarisducers which are provided at the side wall of the tyre where maximum deformation is possible, i
7. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 6, wherein said sensors/ transducers are embedded to a belt like structure having a hole like structure to attach to valve s ξ>f a tube in tyre-tube arrangement, in such locations where maximum deformation takes place.
8. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 3 6, wherein periodic deformation of the side wall, while the tyre is rolling, is captured and transmitted by capturing and transmitting means to ECU and the ECU compares the input from the transducer unit and with predetermined conditions and accordingly sends signal to the dashboard.
9. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 1, wherein individual pressure conditions of tyres are displayed on dashboard and transmission of the readings is done by wireless transmission means which is attached to wireless transmission means attached to wheel.
10. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 1, wherein dashboard shows tire arrangement in a two -dimensional display unit which is replica of wheel arrangement of vehicle so that the driver can easily know the pressure range of each tire and can also make a comparison of the tyres and accordingly take preventive maintenance steps or curative steps.
11. The Pneumatic Pressure Sensor (PPS) for vehicles as claimed in claim 1, wherein tachometer is provided in every wheel to read the revolutions per minute of every wheel and comparison of input of tachometer and input of sensor/transducer is done in ECU to know whether there is a possibility of skidding depending upon the air pressure of the tyres and rpm of each wheel and output is communicated to the driver.
12. The Pneumatic Pressure Sensor (PPS) for vehicles substantially as herein described and illustrated in accompanying άrawmjύ |
TITLE: Pneumatic Pressure Sensor
FIELD OF INVENTION: This invention relates to Pneumatic Pressure Sensor (PPS) to indicate instant pressure of tyre as compared to standard pressure of the tyre.
BACKGROUND:
In Run Flat Technology it is difficult to know whether there is puncture or not in a tyre. Puncture damages the punctured tyre as well as other tyres in both Run Flat Technology and other tyres. Low pressure in tyre increases the possibility of puncture and decreases the fuel efficiency of the vehicle. Uneven pressure in different tyres of a vehicle decreases the stability and drivability of the vehicle. In case of run flat technology, the tyres are to be provided with sensors to sense pressure of the tyre. The existing pressure loss sensor is expensive as it has many parts. While engaging and disengaging the tyre to the rim said sensor are most likely to be damaged.
OBJECT:
Object of this invention is to obviate the above drawbacks by providing an indicator which senses the signal sent by the Pneumatic Pressure Sensor (PPS) fitted on the wheel/rim/ inner tyre/ inner part of the tyre. This Pneumatic Pressure Sensor (PPS) is suitable for tubeless, radial, bias, bias-ply tyres or any tyre that uses any pressurized fluid to carry the load.
SUMMARY OF INVENTION:
To achieve the above said objective, this invention provides a "Pneumatic Pressure Sensor (PPS)" for vehicles comprising of:
- a means to sense the deformation in side walls or distance between wheel and crown portion of tyre;
- a means to capture details of deformation or distance;
- a means for transmitting the same information to ECU which further sends signal to the dashboard after processing the same information.
The means to sense deformation or distance comprises of a flexible wire loop (7) of whose one end is fixed to a housing (5); said wire loop passes through supporting wire notch at the inner side of the crown portion of the tyre (8) and free end of said wire loop is passed through receptors (6) to capture details of deformation or distance.
The wire loop can be reoriented in different directions even perpendicularly and it should have inflexible sides.
An electrical circuit is connected to said receptors so that once the free end touches any of the receptor the circuit is closed and accordingly the signal is sent to indicator on dashboard.
At least two indicators per tyre are provided on the display board to show acceptable pressure and unacceptable pressure.
The means to sense deformation or distance are Sensors/transducers which are provided at the side wall of the tyre where maximum deformation is possible.
The sensors/ transducers are embedded to a belt like structure having a hole like structure to attach to valve of a tube in tyre-tube arrangement, in such locations where maximum deformation takes place.
Periodic deformation of the side wall, while the tyre is rolling, is captured and transmitted by capturing and transmitting means to ECU and the ECU compares the input from the transducer unit and with predetermined conditions and accordingly sends signal to the dashboard.
Individual pressure conditions of tyres are displayed on dashboard and transmission Of the readings is done by wireless transmission means which is attached to wireless transmission means attached to wheel.
Dashboard shows tire arrangement in a two dimensional display unit which is replica of wheel arrangement of vehicle so that the driver can easily know the pressure range of each tire and can also make a comparison of the tyres and accordingly take preventive maintenance steps or curative steps.
Tachometer is provided in every wheel to read the revolutions per minute of every wheel 1 and comparison of input of tachometer and input of sensor/transducer is done in ECU to' know whether there is a possibility of skidding depending upon the air pressure of the 1 tyres and rpm of each wheel and output is communicated to the driver.
Brief Description:
Fig.l shows side view of the Pneumatic Pressure Sensor.
Fig.2 shows side view of the Pneumatic Pressure Sensor.
Fig.3 shows front cross-sectional front view of the Pneumatic Pressure Sensor.
Fig.4 shows front cross-sectional front view of the Pneumatic Pressure Sensor.
Fig.5 shows front cross-sectional front view of the Pneumatic Pressure Sensor.
Fig.6 shows front cross-sectional front view of the Pneumatic Pressure Sensor.
Fig.7 shows side view of the Pneumatic Pressure Sensor with necessary attachment.
Fig.8 shows front cross-sectional front view of the Pneumatic Pressure Sensor with necessary attachment.
Detailed Description:
Referring to the drawings a Pneumatic Pressure Sensor (PPS) for vehicles comprising of a means to sense the deformation in side walls or distance between wheel and crown portion of tyre and a means to capture the information of deformation or distance and a means for transmitting the same information to ECU which further sends signal to the dashboard after processing the same information.
In one of the embodiment as shown in drawings a flexible wire loop (7) of suitable length and diameter whose one end is fixed to a housing (5) is provided. Said wire loop passes through supporting wire notch at the inner side of the crown portion of the tyre (8). Free end of said wire loop is passed through receptors (6). In one of the embodiment wire loop orientation can be reoriented in different directions even perpendicularly. The wire lϋbp should have inflexible sides so that the lateral movement between the crown portion of the tyre aind wheel is reflected in the movement of the wire loop. The movement of said free end iis sensed by the receptors (6) and signal is passed to the display board. An electrical circuit is connected to the metal loop so that once the free end touches any of the receptor the circuit is closed and accordingly the signal is sent to the indicator.' When the free end touches the first; receptor indicator shows green, when it touches the secόtϊd- receptor the indicator shows > yellow and when it touches the third receptor the indicator" shows red. The respective circuit of the small metal loop is completed when the free end' of the large metal loop touches the small loop or receptor thus indicating the amount of
pressure in the tyre/tube. The size of each small metal loop or receptor is such that it can properly accommodate the incoming free end of the large metal loop one after another according to the amount of pressure in the tyre. Numbers of indicators are provided on the display board according to number of tyres in the vehicle, each indicator contains at least two lights and preferably three in-built light of green, yellow and red colour where green indicates standard pressure, yellow indicates lower pressure and red indicates pressure below permissible level. There are different types of receptor such as small metal loop or any protruding conducting receptor.
In place of light LEDs (indicators) can also be used to show puncture condition, low pressure, medium pressure, high pressure. The high pressure condition is shown by another indicator preferably of different colour then blue, yellow/orange and red. The high pressure condition is judged when the deformation is minimum, and the metal wire touches the first receptor or the transducer/ sensor coupled to the side wall of tyre or sensor/ transducer attached to tube senses minimum deflection.
Sensors/transducers (1) are provided at the side wall of the tyre. For tubeless tyre the sensors/ transducers are to be fitted at that part of the side wall where maximum deformation is possible. For tube-tyre arrangement a belt like structure (2) can be fitted to the tube inside tyre. A hole like structure (3) is provided to attach the belt like structure on the valve and the valve of the tube is used as a reference point and restricts the movement of the belt like structure with ends having attaching means to make a closed loop like structure, where sensor/ transducer is embedded in such locations where maximum deformation takes place. The place of coupling said transducer on the side wall is that place where the deformation of the tire is, maximum. The periodic deformation of the side wall, while the tyre is rolling s is captured and transmitted by capturing and transmitting means (10) to ECU arid the ECU compares the input from the transducer unit and with predetermined conditions and accordingly sends signal to the dashboard. Individual pressure conditions of tyres are displayed on dashboard. The transmission of the readings is preferably done by wireless transmission means. Said wireless transmission means is preferably attached to the wheel.
Preferably the dashboard shows the tire arrangement in a two dimensional display unit which is replica of the wheel arrangement of the vehicle so that the driver can easily know the pressure range of each tire and can also make a comparison of the tyres and accordingly take preventive maintenance steps or curative steps.
Preferably tachometer is provided in every wheel to read the revolutions per minute of every wheel and comparison is done between revolutions of every wheel, to know whether there is a possibility of skidding depending upon the air pressure of the tyres and rpm of each wheel. The input of tachometer and input of sensor/transducer is compared in ECU and studied and the output is communicated to the driver.
Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limited sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. It is therefore contemplated that such modifications can be made without departing from the spirit or scope of the present invention as defined.