CN2765812Y

CN2765812Y - High accuracy metering oil tank

Info

Publication number: CN2765812Y
Application number: CN 200520029817
Authority: CN
Inventors: 孙方震; 蒋学舜
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-19
Filing date: 2005-01-19
Publication date: 2006-03-22
Anticipated expiration: 2015-01-19

Abstract

The utility model relates to a high accuracy metering oil tank, particularly an automobile fuel tank which has the function of metering. The utility model is characterized in that the inner part of an oil tank body is provided with a telescopic body, the width and the height of which is the same as the width and the height of an inner wall of the oil tank. The outer side of the oil tank is provided with a stepper motor which is provided with a pulse sensor, and the stepper motor is used for driving a speed reducer which is composed of a worm and a worm wheel. One end of a screw rod penetrates through the telescopic body to be fixed at an inner wall of the movable end of the telescopic body, and the other end of the screw rod is connected with a screw nut. The screw nut is rotated following to the worm wheel to cause the screw rod to drive the telescopic body to move forwards and downwards in the oil tank, and an oil surface is always controlled within the control range of a liquid level sensor. A computer is used for tracking pulse which is transmitted from the pulse sensor, and each pulse value uniquely corresponds to definite oil mass value. The computer can be carried out the calculation according to current pulse value, and accurate oil mass value can be displayed on a display.

Description

The high-precision measuring fuel tank

One, technical field

The utility model relates to a kind of fuel tank for automobile with function of measuring.

Two, background technology

The petrol service station accuracy of measuring is one of customer's problem of having strong complaints always, the means that illegal petrol service station is stolen oil respectively have unique skill especially, from the simplest bonus point branch oil pipe, accent oil pump, to changing coefficient of flow, installing remote controller additional, even the program of change computer fuel charger, means are multifarious, and characteristics are respectively arranged.But a common ground is arranged, be exactly no matter to give the customer how many oil at ordinary times less, in case the law enfrocement official checks or measures when identifying again can very fast recovery normal, allow the law enfrocement official be difficult to pinpoint the problems, also allow customer's absence of proof when complaining, can not give the due punishment of illegal petrol service station,, refuel at petrol service station and given short weight into universal phenomenon so that some petrol service station is felt reassured and emboldened on account of the support.

China's automobile-used oil consumption in 2003 is 7,000 ten thousand tons, and by average 3800 yuan/ton price, if there is 1/3rd petrol service station on average to embezzle part of what should be issued customer 5% oil plant, the loss that causes to the customer is nearly 44.33 hundred million yuan so.

Up to the present, also there be not a kind of method or device that can reflect the volume read-out error amount directly, accurately, easily.

Three, summary of the invention

The purpose of this utility model is a kind of high-precision metering oil tank of design, by the device in the fuel tank as calculated machine chip handle and can on telltale, read total oil mass in new volume read-out and the fuel tank easily.

The purpose of this utility model realizes by following manner: be provided with a wide height and the measure-alike telescopic body of the wide height of inner wall of oil tank in motor vehicle oil tank, telescopic body one end is fixed on the inwall of casing one end; In the cooresponding casing outside stepping motor is installed, the axle of stepping motor connects the retarder of a worm screw, worm gear composition, worm gear connects a nut, nut rotates with worm gear, screw mandrel cooperates with nut, one end passes telescopic body and is fixed on the telescopic body movable end inwall, and the other end passes worm gear; On stepping motor, be provided with pulse transducer; Be provided with level sensor and temperature sensor at reservoir port; Telescopic body makes oil tank liquid level remain at reservoir port standard liquid level place; The pulse that computer tracking is transmitted by pulse transducer, and with the positive negative pulse stuffing addition, the oil mass value that each number of pulses is certain with unique correspondence.Computer real-time current pulse count be multiply by the temperature correction facotor and the non-linear correction factor of calculating by the temperature in the current fuel tank of temperature sensor collection, and accurate oil mass value is presented on the telltale.Because electronic control part colleague technical personnel all can design, so do not protect, also is not described further.

Good effect of the present utility model is: fuel tank survey precision height, and affected by environment little, can in vehicle ', accurately show the amount of fuel in the fuel tank in real time.

Four, description of drawings

Fig. 1 is the utility model Oiltank structure scheme drawing; Fig. 2 looks scheme drawing for the left side of Fig. 1; Fig. 3 is the control principle figure of the utility model fuel tank.

Five, the specific embodiment

With the accompanying drawing is that example describes implementation procedure of the present utility model in detail:

In automotive oil casing 4, be provided with a wide height all with the measure-alike telescopic body 5 of the wide height of inner wall of oil tank, telescopic body 5 one ends are fixed on the inwall of casing 4 one ends, in the cooresponding casing outside stepping motor 8 is installed, the axle of stepping motor 8 connects the retarder of a worm screw 7, worm gear 10 compositions, connect a nut 6 on worm gear 10, nut 6 rotates with worm gear 10; Screw mandrel 9 cooperates with nut 6, one end passes telescopic body 5 and is fixed on the telescopic body movable end inwall, the other end passes worm gear 10, nut 6 is with worm gear 10, when worm screw 7 is rotated, can make screw mandrel 9 drive telescopic body 5 and in fuel tank, move forward and backward, pasta is controlled at all the time in the range of control of level sensor 2.Pulse transducer 11 is installed on stepping motor 8, and level sensor and temperature sensor are located at the reservoir port place.Telescopic body 5 makes oil tank liquid level remain at reservoir port standard liquid level place; The pulse that computer tracking is transmitted by pulse transducer 11, and with the positive negative pulse stuffing addition, the oil mass value that the unique correspondence of each number of pulses is certain, computer real-time current pulse count be multiply by the temperature correction facotor and the non-linear correction factor of calculating by the temperature in the current fuel tank of temperature sensor collection, and accurate oil mass value is presented on the telltale.

Using method of the present utility model is: when preparing to refuel, press [oiling/measurement] button on the supervisory keyboard 14, computing machine 13 will write down present number of pulses and export negative signal telescopic body 5 is contracted to the shortest, after oiling finishes, press [oiling/measurement] button on the supervisory keyboard 14 again, computing machine 13 will make the liquid level of oil plant 3 remain on reservoir port standard liquid level place, and current pulse count and recording impulse number are subtracted each other, and multiply by coefficient of correction again and promptly obtain actual oiling value.Press [demonstration] button on the supervisory keyboard 14, with the actual oil mass that shows in the fuel tank.

Measuring accuracy of the present utility model: the fuel tank length of supposing one 80 liters is 80 centimetres, so per 1 millimeter cooresponding oil mass is 100 milliliters, if adopt 2 millimeters pitch, 50: 1 worm type of reduction gearing and per 4 stepping motors that pulse is turned around, the cooresponding step distance of each pulse is 2 ÷ (50 * 4)=0.01 millimeters, cooresponding oil mass is 100 * 0.01=1 milliliter, just COMPUTER DETECTION just has the variation of what milliliter oil masses to what pulses, and resolution (also can be described as accuracy) is 1 milliliter under perfect condition.Certainly, consider the influence (above error can not produce accumulated error) of the composite factors such as measured error of nonlinearity erron, raw-material elastic error, Temperature Influence and reservoir port float, composition error should be controlled in 10 milliliters.

Claims

1, a kind of high-precision measuring fuel tank is made up of casing, liquidometer, it is characterized in that: be provided with the measure-alike telescopic body (5) of a wide height and the wide height of inner wall of oil tank in casing (4), telescopic body (5) one ends are fixed on the inwall of casing one end; In cooresponding casing (4) outside stepping motor (8) is installed, the axle of stepping motor (8) connects the retarder of a worm screw (7), worm gear (10) composition, and worm gear (10) connects a nut (6), and nut rotates with worm gear (10); Screw mandrel (9) cooperates with nut, and an end passes telescopic body and is fixed on telescopic body (5) the movable end inwall, and the other end passes worm gear (10); On stepping motor (8), be provided with pulse transducer (11); Be provided with level sensor (2) and temperature sensor (1) at reservoir port; Telltale (12) and supervisory keyboard (14) are located on the operation board of operator's compartment.