CN86209009U - Cylinder-closing fuel-saving device for valve-in-head gasoline engine of automobile - Google Patents

Abstract

The utility model relates to a cylinder-closing fuel-saving device for a valve-in-head gasoline engine of an automobile. In the middle and small operating condition, the cylinder-closing fuel-saving device can close some cylinders, regulate the air-fuel ratio and combust lean mixture in the cylinder-closing condition to save the fuel. The utility model comprises an on-off selector, a telescopic valve rocker push rod, a fuel level regulator of a fuel compared device float chamber, an air-fuel ratio regulator, a stepping motor, a transmission mechanism of the stepping motor and a microcomputer. The use of the utility model can greatly improve the economic performance of the automobile provided with the valve-in-head gasoline engine and notably decrease the pollution of the CO, CH compounds in the exhaust gas to the atmosphere.

Description

Cylinder-closing fuel-saving device for valve-in-head gasoline engine of automobile

The utility model relates to a kind of cylinder closing oil-saving device of motor petrol motor, is specially adapted to the Overhead valve petrol engine.

For the motor petrol motor, in communications and transportation, most time works under medium and small load condition, is the basic reason that causes the economic performance difference.So employing is closed partly, and cylinder causes the relevant personnel's attention already to save this method of fuel oil.Realization kill engine the partly method or the device of cylinder, existing abroad a lot of patents get the Green Light.Wherein a class is adopt to cut off Carburetor to the method for air intake branch of the engine for fuel oil, perhaps adopts to cut off for the method for inflammable mixture with the cylinder partly of realizing killing engine.U.S. Pat-4.192.278 for example, US-4.204.514 and US-4.187.824 etc.Another kind of patent is to adopt a kind of telescopic valve tappet mechanism to replace the fixing valve tappet of length in the former motor, the partly cylinder of realizing killing engine.External also have many patents that a large amount of improvements has been done in flexible valve tappet design.If any employing engine cam is located at cylinder head top, a telescopic mechanism has been installed between valve rocker and camshaft, the valve tappet that has replaced the used fixed length of former motor is to realize partly often closing or often open cylinder closing oil-saving method of cylinder inlet and exhaust valve of motor.The way that the adopts scalable valve rocker bearing partly inlet and exhaust valve of realizing killing engine is also arranged, reach the saving fuel oil.Cylinder technology is closed in vehicular engine part in sum, mechanism's more complicated, and perhaps relating to the design new engine could realize.Also there is certain problem from saving on the fuel oil simultaneously.For example the sort of petrolic a part of cylinder suction valve cuts out and way that outlet valve is often opened can make gas exchange loss increase reduced oil-saving effect.Do not make corresponding coupling as Carburetor in addition, be difficult to reduce significantly oil consumption yet.

Characteristics of the present utility model are: specially at petrol engine, the petrol engine that particularly is suitable for most Overhead valve, design a kind of by clutch selector, scalable valve rocker push rod, and stepper motor and driving mechanism thereof, the gasoline-saving device that microcomputer and driving power thereof are formed.During engine operation, the opening of inlet and exhaust valve is to rotate because of camshaft, cam pushes tappet, push rod below the valve rocker push rod and promotes rocking arm again and drive valve and overcome valve spring power and realize that after cam lobe partly was rotated away from tappet, valve spring forced valve-closing again.The utility model is designed to the valve rocker push rod telescopic, manipulation by clutch selector again, make pusher body and mandrel two part rigid bodies of be combined into or make two partly can move to axial, when two of push rod partly is in separated state, the rotation of cam, can not drive the valve rocker unseat the valve by push rod, its corresponding cylinder just is closed, motor is under medium and small load condition, close partly cylinder, can reduce the restriction loss of working cylinder and the gas exchange loss of working cylinder not, thereby improve the charging efficiency of motor.In the using process that the part cylinder is closed, owing to adopt the rational Match of fuel level height adjuster of carburetor float chamber, close the part cylinder with independent employing and compare, improve oil-saving effect in the use greatly, make this device fuel saving ratio can reach 15%～30%.Realize closing one or close a plurality of cylinders step by step according to the load of motor, not only power ramp up is little, and it is steady to close the cylinder switch transition, and the output power excursion is big, and practicability is extensive.Owing to improved the engine interior working state, significantly reduced CO in the discharging, CH compound pollution to atmosphere.

The petrolic cylinder closing oil-saving device of automobile-used Overhead valve is by clutch selector, scalable valve rocker push rod, stepper motor and driving mechanism thereof, microcomputer and driving power thereof, add the fuel level height adjuster of carburetor float chamber that is complementary with tail-off part cylinder working state, the air fuel ratio regulator is formed.Scalable valve rocker push rod by the spring in hollow push rod body, the bar of packing into, separate mandrel, be enclosed within pusher body outer separation sleeve, four above steel balls and formed.The through hole that the uniform circumference that cooperates with above-mentioned steel ball more than four is arranged on a certain section of its hollow push rod body, steel ball is respectively charged in the hole, and inside and outside through hole, have and expose partly, the cylndrical surface in its hole engages with the steel ball face, it separates also uniform circumference sphere pit and the axial arc guide groove that cooperates with steel ball more than four on the mandrel, pack in the hollow push rod body, the adjusting bolt bulb that has spring, end to have spherical male hole and rocking arm to adjust the valve clearance down cooperates.One circular groove is arranged at separation sleeve internal circular surfaces top, and a circular arc groove that cooperates with steel ball is arranged at the bottom.Exposing partly in the relative pusher body of steel ball matches with the sphere pit of mandrel.Exposing partly of the relative pusher body of steel ball outside matches with separation sleeve internal surface upper, annular groove, when separation sleeve to lower slider, steel ball enters the circular groove of its internal surface, mandrel just can move up and down in the hollow push rod body flexibly, mandrel and pusher body are releasing orientation, when separation sleeve is upwards lifted, steel ball enters separation sleeve lower annular arc groove and separates in the mandrel pit, and mandrel and pusher body are locking state.The valve rocker push rod forms fixedly rigid body of length.Clutch selector is made up of helical spring, separation gland, separation sleeve, separation pull bar, separating arm transmission shaft.Disjoining pressure is sleeved on the hollow push rod body, and an end contacts with separation sleeve top, and helical spring is contained in below the separation sleeve, the push-rod hole end contact of the other end cylinder head, separate gland and press down, perhaps break away from separation sleeve and upwards slide, can make separation sleeve upwards slide or upwards lift along pusher body.Micro-step motor and driving mechanism thereof, microcomputer and driving power thereof are made up of worm screw, worm gear, axle.When microcomputer sends signal according to the speed of a motor vehicle operating mode that motor should close cylinder to driving power, send the desired angle of pulse signal drive stepping motor by driving power again, the worm drive worm gear that is contained on the step motor shaft rotates, then driving worm-wheel shaft rotates, driving the separating arm clockwise direction that is contained on the axle again rotates, then drive and separate pull bar compressing separation gland, the separation gland is oppressed again and is positioned at following separation sleeve, make it to overcome helical spring power to lower slider, be the steel ball displacement of locking state in the circular groove on separation sleeve internal surface top in the hollow push rod this moment, owing to be installed in the strength of the interior spring force of hollow push rod less than valve spring, smooth sliding about the separation mandrel enables in hollow push rod, cause corresponding valve to be in closed condition, promptly close the cylinder state.Otherwise, when stepper motor is accepted microcomputer and driving power signal thereof to counter-rotation, worm drive worm gear on it, transmission shaft, separating arm rotates to counterclockwise direction, the separation pull bar is moved upward, at this moment, the separation gland is no longer pushed down separation sleeve and is upwards slided, and the helical spring that is positioned at below the separation sleeve upwards lifts separation sleeve, the curve bath of separation sleeve internal surface bottom separates the mandrel pit and engages and the formation solid lifter with steel ball, along with engine cam rotates, scalable valve rocker push rod moves up and down, and finishes opening of inlet and exhaust valve, promptly opens the cylinder state.Like this, as long as driving the pairing clutch selector of one or several cylinder intake and exhaust valve selectively, the microcomputer of control system just can make the inlet and outlet valve of these cylinders be in buttoned-up status.Close the partly requirement of cylinder engine working state for the work that makes Carburetor can adapt to, the utility model is provided with Carburetor oil surface height adjuster and air fuel ratio regulator.The Carburetor oil surface height adjuster is by housing, is contained in minitype electromagnet in the housing, regulates bolt, prevents that the torque spring and the plug that rotate from forming.Its effect is to be in when closing under the cylinder state work when motor, and the microcomputer automatic control electromagnet is in attracting state, makes to regulate bolt and produce displacement, makes carburettor float rising certain altitude, adapts to the height that closes the cylinder state thereby the float chamber pasta is dropped to.When motor left cylinder fully, microcomputer tripping magnet power supply, carburettor float set back under spring action and put, and float level goes back up to again and all opens the desired height of cylinder.The effect of air fuel ratio regulator is that inflammable mixture concentration is adjusted.When motor use weak mixture when cutting out partly cylinder work, otherwise mixture strength strengthens the requirement that Cylinder engine is closed in adaptation.

1 to 2 represented embodiment is described the utility model below in conjunction with accompanying drawing.

Accompanying drawing 1 is for being in the scalable valve rocker push rod sectional view of locking state.Wherein:

The 1-engine air valve rod, the 2-valve rocker, screw is adjusted in the 3-valve clearance, the scalable valve rocker pusher body of 4-, 5-steel ball, 6-separation sleeve, 7-separates mandrel, the 8-spring, and 9-is in conjunction with spring, 10-separates gland, and 11-separates pull bar, 12-separating arm, the 13-valve spring, 14-bearing pin, 15-worm gear drive shaft, the 16-worm gear, 17-worm screw, 18-stepper motor.

Accompanying drawing 2 is for being in the scalable valve rocker push rod sectional view of releasing orientation, and its each part is identical with accompanying drawing 1.

The utility model embodiment's cylinder closing oil-saving device, closing partly, cylinder with the course of action of opening buttoned-up part cylinder is: the medium and small load of motor is down if realize closing a cylinder.At first be that stepper motor 18 rotates a certain angle by the micom drives power supply signal, the worm screw 17 that is contained on the step motor shaft drives worm gear 16 rotations, and drive the separating arm 12 be contained on the transmission shaft 15 and clockwise rotate, drive the separation pull bar 11 that is bonded on the separating arm and move downward to separating gland 10 and apply downward active force.Force separation sleeve 6 to overcome the strength of spring 9 to lower slider, steel ball 5 enters the state disintegration of separation sleeve internal surface top curve bath with release rod locking becoming rigid body, because the power of valve spring 13 is greater than the elastic force of scalable valve rocker pusher body inner spring 8, separating mandrel pressure spring in hollow push rod slides up and down, the rotation of engine cam is no longer worked to valve rocker, inlet and exhaust valve is in closed condition, promptly close the cylinder working state, are the positions that are adjusted at different amount because of each cylinder inlet and exhaust valve separating arm 12 again, the separating arm that angle is big is at first closed pairing cylinder inlet and exhaust valve, when needs were closed two cylinders, stepper motor rotated an angle again and just can realize.Therefore closing a plurality of cylinders carries out step by step.Otherwise, when engine operating condition requires multi-cylinder work, microcomputer and driving power control step motor and driving mechanism thereof, the separating arm inhour that drives is rotated and is separated pull bar 11 and move upward to drive and separate gland 10 and upwards lift, separation sleeve below it is upwards lifted under the effect of helical spring 9, steel ball 5 enters in the separation sleeve internal surface lower curved groove, make in the hollow push rod body and to separate mandrel 7 separation sleeve 6 and be combined into rigid body, the buttoned-up cylinder of engine valve opens, state work routinely.Close or open cylinder in, microcomputer sends SC sigmal control carburetor bowl fuel head, regulate pasta and descend and raise, with the air fuel ratio regulator to the control of mixture strength with close the cylinder machine and adapt.Embodiment proves that using the utility model is the effective measures that improve Overhead valve petrol engine economic performance.

Claims (6)

1, a kind of cylinder closing oil-saving device of motor petrol motor, be specially adapted on the Overhead valve petrol engine, it is characterized in that it is by clutch selector, scalable valve rocker push rod, fuel level height adjuster of carburetor float chamber, stepper motor and driving mechanism, microcomputer and driving power are formed.

2, device according to claim 1 is characterized in that described clutch selector is by helical spring, and separation gland, separation pull bar, separating arm transmission shaft are formed.

3, device according to claim 1 is characterized in that described scalable valve rocker push rod is made up of hollow push rod body, spring, separation mandrel, separation sleeve, steel ball.

4, device according to claim 3, it is characterized in that in the described scalable valve rocker push rod, four above steel balls are arranged, on a certain section of its scalable pusher body, the uniform circumference through hole that cooperates with above-mentioned steel ball more than four is arranged, the cylndrical surface in its hole engages with the sphere of steel ball, the end has spherical pit and valve rocker adjustment valve clearance bolt bulb to cooperate, it separates the guide groove that the sphere pit of the uniform circumference that cooperates with above-mentioned steel ball is also arranged and pass through the axial arc of pit on the corresponding section of mandrel, one circular groove is arranged at its separation sleeve internal circular surfaces top, and a curve bath that cooperates with steel ball is arranged at the bottom.

5, device according to claim 1 is characterized in that described stepper motor and driving mechanism thereof and microcomputer and driving power thereof are made up of stepper motor, worm screw, worm gear, axle and microcomputer and pulse oscillator.

6, device according to claim 1 is characterized in that described fuel level height adjuster of carburetor float chamber is by minitype electromagnet, adjusts the return spring of screw and rotation inhibiting and forms.

Images