| Title of Invention | A DEVICE FOR CONTROLLING OVERSPEEDING OF AUTOMOBILES |
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| Abstract | This invention relates to a device to control over speeding of venicles. It consists of a unit having an input and an output means, a programmed speed limit valve, the output connected to electronic switches capable of causing misfire in the cylinders and thereafter deactuating the fuel supply to the engine to reduce the speed. When the speed limit goes below the predetermined limit the fuel supply switch is activated to restart the engine. |
| Full Text | FORM 2 THE PATENTS ACT 1970 (39 of 1970) & THE PATENTS RULES, 2003 COMPLETE SPECIFICATION (See Section 10; rule 13) TITLE OF THE INVENTION A device for controlling overspeeding of automobiles APPLICANTS TATA MOTORS LIMITED, an Indian company having its registered office at Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India INVENTORS Mr. Shankar Kamanna Kengar, Mr. Srinivasan Govindarajan, Mr. Deepak Suryakant Kulkarni, Mr. Sadagopan Krishnan all Indian nationals of TATA MOTORS LIMITED, an Indian company, having its registered office at Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India PREAMBLE TO THE DESCRIPTION The following Complete specification particularly describes the invention and the manner in which it is to be performed. FIELD OF INVENTION This invention relates to a device for controlling overspeeding of automobiles. This device may be connected to carbureted engines, which do not include any other means for limiting speed. This device may also be attached to carbureted engines running on mono and bifuels like gasoline and CNG and gasoline and LPG. BACKGROUND OF INVENTION Unlike multipoint fuel injection engines and diesel engines, carbureted engines do not have speed control unit as an integral part of their design. Carbureted engines now find applications with alternate fuels such as CNG and LPG. The present trend is for high speed engines and highly offensive driving practice practiced by many city drivers, maximum speed limit and speed control of vehicles become an essential and life saving feature. OBJECTS OF INVENTION The main object of this invention is to limit engine speed at the desired and preset maximum, which is achieved by both operating and fuel controls governed by an electronic speed control means. This not only avoids overspeeding and resultant problems but also increases the engine life and fuel efficiency. 2 BRIEF DESCRIPTION OF INVENTION This invention relates to a device for controlling overspeeding of automobiles which comprises an electronic over speed control unit connected to the engine of the automobile said unit having a signal receiving input means, an output means, said input means connected to a predetermined set of speed limits, a set of first electronic switches capable of triggering misfire in the first, second and third cylinders of the combustion engine sequentially to momentarily reduce the engine speed, means to monitor the misfire in the cylinder and atleast one switch to stop fuel supply to the engine when the predetermined speed limit exceeds said speed control unit being capable of deactuating the first series of electronic switches to restart the engine. DESCRIPTION OF INVENTION Detailed description of the device for controlling overspeed is given below in comparison with the existing systems. Fig I of the accompanying drawings shows a schematic block diagram of the existing carbureted engine. Wherein reference letters D, E and C represent the distributor, engine and the coil respectively. Numerals 1, 2, 3, 4 and 5 represent the throttle, carburetor, fuel feed pump relay, fuel feed pump and high tension cables respectively. The air and fuel quantity supplied to the engine governs the speed of the engine and that of the vehicle. The butterfly valve operated by the throttle thro' control linkage of the accelator pedal. Air and fuel supply to the engine is controlled by the opening of the butterfly valve. However in a carburetor engine fuel flow is governed by the 3 carburetor which is proportionate to the air flow power produced by the ignition of air and fuel provides speed. It is understood that when the throttle is opened more, increased quantity fuel and air is supplied to the engine resulting in high speed. The block diagram shown in Fig 2 represents the carbureted engine with the device according to this invention connected thereto. Wherein D stands for the distributor and E for the engine. Reference letter EOSC shows the engine over speed controller i.e. speed control unit. Reference numerals 1, 2, 3, 4 and 5 stand for throttle, carburetor, fuel feed pump relay, fuel feed pump and high tension cable respectively. ESI and ES2 stand for the first and second electronic switches. The engine over speed controller (EOSC) receives the speed signals from the engine as input and compares it with the predetermined maximum speed set point contained in the EOS£ unit when the engine speed is less than the set value of maximum speed the un|t remains inactive and no output signal is given. However, when the engine speed |s equal or more than the set point, the electronic switch ESI is activated such that trje ignition system generates misfire in one cylinder to reduce the power generated by trie engine momentarily by tending to reduce the engine speed. This control unit is preprogrammed, that the engine speed still is more than the maximum pre set value, yet another cylinder is triggered to misfire to impart better control over the engine speep. If the engine speed is still more than the maximum preset value, the third cylinder jfs also triggered to misfire in all the three cylinders for better speed control. This misfire is monitored for a pre determined time which is settable in the unit and if this tinjte exceeds, the engine overspeed control unit deactivates an electronic switch ES2 jto stop the fuel supply to the engine. This is inaddition to the misfire in the cylinders ai^d is aimed at positive reduction in engine speed. Once the speed limit is below the pije- 4 set value, ES2 is actuated to restart fuel supply. Simultaneously the misfire switches ES1 is deactuated to stop misfire and the engine restores its normal speed. The block diagram shown in Fig 3 is applicable to conventional engines run on compressed natural gas fuels wherein D, C and E represent the distributor, coil and the engine respectively. Reference numbers 1, 2, 3, 4, 5 and 6 show the throttle, carburator, gas shut off solenoid, gas air mixer, high tension cables and pressure regulator respectively. Fig 4 is a block diagram incorporating the speed control unit of this invention. In addition to the parts described under Fig 3, this diagram shows ESI, ES2 and EOSC, which are as described under block diagram 2. Fig 5 shows the diagram for Spark Ignition engine with bifuel operation with the engine over speed control device of this invention. Reference letters C D and E stand for coil, distributor and engine respectively while reference numbers 1, 2, 3,4, 5 and 6 stand for throttle, carburetor, gas shut off solonoid, fuel shut of solenoid, gas air mixer, fuel feed pump, high tension cables and pressure regulator respectively, ESI ES2 and ES21 are the electronic switches and EOSC is the speed control unit. Dotted lines in all the figures 1 to 5 represent engine speed signal. Distributor of the engine may be an electronic or mechanical distributor. Both mono fuel and bifuel operations can be controlled by this device and the fuels are gasoline, CNG and LPG either alone or in combination. 5 WE CLAIM: - 1) A device for controlling over speeding of automobiles comprising an electronic over speed control unit connected to the engine said unit having a signal receiving input means a predetermined set of speed limit programme, are output means connected to a first electronic switch capable of triggering misfire in the first, second and third cylinders of the combustion engine sequentially to momentarily reduce the engine speed when the input means signal overspeed, and a second electronic switch de-acruatable to stop fuel supply to the engine, and actuatable to supply fuel when the speed limit is below the pre-determined value to restart the engine. 2) The device as claimed in claim 1, connected to mono and bifuel engines. 3) The device as claimed in claims 1 and 2, connected to a distributor, ignition control and fuel control. 4) The device as claimed in claims 1 to 3, wherein the engine fuel is gasoline, compressed natural gas, and liquid petroleum gas or a mixture of the two. 6 5) The device as claimed in claim 3, wherein the distributor is an electronic or mechanical distributor Dated this day of December 2006 TATA MOTORS LIMITED By their Agent and Attorney Karuna Goleria of DePENNING & DePENNING 7 ABSTRACT Title : A Device For Controlling Overspeeding Of Automobiles Fig. 1 This invention relates to a device to control over speeding of vehicles. It consists of a unit having an input and an output means, a programmed speed limit valve, the output connected to electronic switches capable of causing misfire in the cylinders and thereafter deactuating the fuel supply to the engine to reduce the speed. When the speed limit goes below the predetermined limit the fuel supply switch is activated to restart the engine. |
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2031-mum-2006-abstract(12-12-2006).doc
2031-mum-2006-abstract(12-12-2006).pdf
2031-MUM-2006-ABSTRACT(22-7-2008).pdf
2031-mum-2006-cancelled pages(12-12-2006).pdf
2031-MUM-2006-CLAIMS(22-7-2008).pdf
2031-mum-2006-claims(granted)-(12-12-2006).doc
2031-mum-2006-claims(granted)-(12-12-2006).pdf
2031-mum-2006-correspondance-received.pdf
2031-mum-2006-correspondence(22-07-2008).pdf
2031-MUM-2006-CORRESPONDENCE(22-7-2008).pdf
2031-mum-2006-correspondence(ipo)-(23-01-2009).pdf
2031-mum-2006-description (complete).pdf
2031-MUM-2006-DESCRIPTION(COMPLETE)-(22-7-2008).pdf
2031-mum-2006-drawing(12-12-2006).pdf
2031-MUM-2006-DRAWING(22-7-2008).pdf
2031-MUM-2006-FORM 1(12-12-2006).pdf
2031-mum-2006-form 18(21-01-2007).pdf
2031-mum-2006-form 2(22-7-2008).pdf
2031-mum-2006-form 2(granted)-(12-12-2006).doc
2031-MUM-2006-FORM 2(TITLE PAGE)-(22-7-2008).pdf
2031-mum-2006-form 3(12-12-2006).pdf
2031-mum-2006-form 5(11-12-2006).pdf
2031-mum-2006-form 9(02-01-2007).pdf
2031-mum-2006-power of attorney(17-11-2004).pdf
| Patent Number | 227873 | |||||||||||||||
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| Indian Patent Application Number | 2031/MUM/2006 | |||||||||||||||
| PG Journal Number | 10/2009 | |||||||||||||||
| Publication Date | 06-Mar-2009 | |||||||||||||||
| Grant Date | 23-Jan-2009 | |||||||||||||||
| Date of Filing | 12-Dec-2006 | |||||||||||||||
| Name of Patentee | TATA MOTORS LIMITED | |||||||||||||||
| Applicant Address | Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001, | |||||||||||||||
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| PCT International Classification Number | B60K31/00 | |||||||||||||||
| PCT International Application Number | N/A | |||||||||||||||
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