CN1710267A

CN1710267A - Electronic throttle body

Info

Publication number: CN1710267A
Application number: CN 200510021215
Authority: CN
Inventors: 郭连; 肖传良; 张德政; 黄道文; 万里军; 刘承栋; 苏崚豹
Original assignee: Sichuan Hongguang Auto Machinery Electric Co Ltd
Current assignee: Sichuan Hongguang Auto Machinery Electric Co Ltd
Priority date: 2005-07-05
Filing date: 2005-07-05
Publication date: 2005-12-21
Anticipated expiration: 2025-07-05
Also published as: CN100340754C

Abstract

This is about a kind of electronic door of saving gas, which belongs to the system of saving air in the engine in the car. It includes the saving gas body, valve chip of saving air, the axis of saving air, DC engine, gear structure for decreasing speed, location sensor and spring, one of whose side is fixed on the body of saving gas, the other side is fixed on the axis of saving gas door. there is also the structure of changing speed. The outside bolt is fixed on the body of saving gas and the inside one on the inside of changing bolt. The spring is fixed between them. In the invention the position is capable to change. The amount of inside gas can be controlled accurately in the low speed, and at the same time it cuts the precision of the production.

Description

Electronic air throttle body

One, technical field

The present invention relates to the automotive engine air intake system parts, relate in particular to the air-throttle assemble technical field that is used for the automobile internal engine aspirating system.

Two, background technique

The throttle body that is used for the car combustion engine engine system has two kinds of mechanical throttle body and electronic air throttle bodies.Present mechanical type throttle body, its throttle plate pin by wire rope with shoulder bar and link to each other with gas pedal in the operator cabin.The driver draws the trochanter air valve shaft to control throttle opening by the pin accelerator pedal, thereby changes the area of closure place gas-entered passageway, and the air inflow of regulating motor reaches the purpose that changes engine output.Then adopt additional device to carry out air or fuel oil compensation for special operation condition, adopt solenoid valve or step motor drive to change the gas-entered passageway area in the idling system by-pass.The control mode of this closure is because the restriction of its dynamic characteristic, can not correspondingly make accurate adjustment according to all operating modes of automobile, particularly all the more so under special operation conditions such as cold starting, low-load and idling, thereby can cause the Economy of automobile to descend, the discharge of poisonous waste amount increases.

Say that from another point of view traditional machinery control, hydraulic control technology are less than electronically controlled quick and accurate, so hysteresis on cooperating, and cause reaction rapid inadequately and direct; In addition, the control mechanism of wirerope formula has the problem of mechanical wear, and service time, control will be healed not precisely, reaction is also just slow more for a long time, and therefore, the air throttle control system of motor adopts electronic technology.

Because ETC (being electron controls technology) is promoting engine power/economy/emission performance and to the advantage of vehicle performance aspect of performance, the complete automatically controlled demand of motor particularly, make SIEMENS, BOSCH, DELPHI, VISTEON, DENSO, main in the world auto-parts such as HITECH, PIERBURG etc. are made commercial city input huge fund and are carried out the research and development of ETC.The research of electronic throttle starts from the beginning of the eighties, and through updating several times, their product is ripe at present, and begins to widely apply; Chinese patent literature discloses a kind of " electronic air throttle body " (application number 03130634), and it comprises the closure valve block, throttle plate pin, shell and air flue, the closure valve block is fixed on the throttle plate pin, and can in air flue, rotate, throttle plate pin is directly driven to do by stepper motor follows rotation synchronously, and its throttle plate pin rotational position is controlled by a calibrating device.Its shortcoming is can not be according to all operating modes of automobile, under at idling operation, correspondingly makes accurate adjustment, causes the Economy of automobile to descend, and discharge of poisonous waste increases.Chinese patent literature has also disclosed a kind of " automobile electronic fuel oil jet system closure and idle speed step motor control gear " (CN2700582), and it comprises that throttle controller (by the aperture by the Electric Machine Control closure such as single-chip microcomputer and engine load sensor), idle speed step motor and control gear etc. form (idle motors is according to single-chip microcomputer SC sigmal control suction tude aperture).Because specially with a cover Electric Machine Control idling air inlet, its mechanical structure is too numerous and jumbled, electronic control system is complicated, and adopt the air inflow of motor under gear transmission mode control idling operation, require quite high to Gear Processing precision and gear-driven accuracy (installation precision), therefore, existing machinery processing, installation level are difficult to reach the application requirements of accurate control air input of engine by air.

Three, summary of the invention

The purpose of this invention is to provide a kind of electronic air throttle body,, reduce accuracy of manufacturing simultaneously under idling operation, to control air input of engine by air more accurately.The object of the present invention is achieved like this: a kind of electronic air throttle body, comprise tb, be contained in the closure valve block on the air suction passage, the throttle plate pin of fixed knot valve valve block on it, direct current generator, with the reduction gears mechanism of transmission of torque to throttle plate pin, its signal exports the throttle position sensor of single-chip microcomputer to, it is characterized in that, also has torsion spring, torsion spring one end is fixed on the tb, and the other end is fixed on the gear on the throttle plate pin; Also has idle adjusting device: regulate screw threads outward and be connected on the tb, interior adjusting screw is screwed in the outer screw inner chamber of regulating, push rod places and outer regulates the screw inner chamber, a shoulder arranged on it, stretch out from the opening of outer adjusting screw push rod outer end before the shoulder, the diameter of this shoulder greater than this opening diameter less than the outer screw intracavity diameter of regulating, spring at outer adjusting screw inner chamber, lean and be compressed between push rod shoulder and the interior adjusting screw; The push rod outer end is resisted against on the gear on the described throttle plate pin, and when no motor driving, makes the closure valve block be in a small aperture position.

There is a tube coupling front portion of adjusting screw in described, and the tube coupling external diameter is less than interior adjusting screw external diameter, and the push rod rear portion is stretched among this tube coupling versatilely, and spring ring is enclosed within on the anterior tube coupling of interior adjusting screw.

Described push rod upper shoulder is made up of the back front portion less than shoulder greater than the rear portion rear portion and diameter with the rear section, and spring ring is enclosed within on this front portion, back.

Described reduction gears mechanism is the two-stage reduction gears mechanism: motor gear and gearwheel engagement are meshing with each other with coaxial mounted small gear of gearwheel and the tooth sector that is installed on the throttle plate pin.

In the technique scheme, under idle adjusting device and torsion spring mating reaction, make the closure valve block when no motor driving, be in a small aperture, make motor have the function of " limp-home ", regulate electronic air throttle body height idle position, as regulate interior adjusting screw, the push rod retraction, the tooth sector counter-rotating, the closure valve block turns down suction port, can regulate low idle position; Otherwise, regulate the outer screw of regulating, push rod protracts, and tooth sector just changes, and the closure valve block is opened suction port greatly, can regulate the high idle speed position.After the general assembly of this throttle body, the leakage rate by to air mass flow under the idling operation and full cut-off the time is demarcated high and low idle position, and finally determines the outer screw position of regulating, and re-uses screw sealing glue and is fixed on the tb.Like this, by increasing an idle adjusting device, reached the effect of accurately controlling air input of engine by air under idling operation, and its accuracy of manufacturing is less demanding, the general machining level can satisfy.And existing motor gear control air inflow mode, then processing, the installation to gear all has quite high requirement.

Because domestic machining accuracy is lower, throttle body assembly idling flow needs to regulate, the slow running adjustment of new design can be regulated at the height idle position of electronic air throttle body, satisfies application requirements, has reduced the requirement to process equipment and assembly precision simultaneously; Cancelled bypass idling (comparing with CN2601307), closure is directly controlled idling, and structure is simpler; Compare with the existing machinery closure, the present invention directly uses motor driving, owing to cancelled the drag-line mechanical device, has reduced mechanical wear, has correspondingly just reduced rate of fault and plant maintenance.

Four, description of drawings

Fig. 1 is a stereogram of the present invention;

Fig. 2 is a structural drawing of the present invention shown in Figure 1;

Fig. 3 is the structural drawing of idle adjusting device shown in Figure 2;

Fig. 4 is the plan view of gear drive shown in Figure 2.

Five, embodiment

Fig. 1 Fig. 2 illustrates, and closure valve block 3 is fixed on the throttle plate pin 2 and is arranged on the air suction passage of tb 1; Throttle plate pin 2 is installed on the tb through bearing 9, micro-computer controlling apparatus of the present invention by single-chip microcomputer (being arranged in the engine control system), with the motor-drive circuit and the single-chip microcomputer of single-chip microcomputer cascade be arranged in the engine control system, near accelerator pedal position sensor (be installed in the operator cabin gas pedal), throttle position sensor 10 (being installed on the shell 12 of tb) etc. form.Single-chip microcomputer receives the accelerator open degree signal, throttle opening signal and engine condition signal are handled, and output motor control signal, drive direct current generator 4 (being installed on the tb) at last, through two-stage reduction gears mechanism 6 (referring to Fig. 4, motor gear 6a and gearwheel 6b engagement, on the axle 14 of gearwheel small gear 6c is installed, be meshing with each other with coaxial mounted small gear 6c of gearwheel 6b and the tooth sector 6d that is installed on the throttle plate pin 2), with torque (after motor speed is transferred to throttle plate pin, rotating speed reduces, torque increases) be delivered to (tooth sector 6d is installed on the throttle plate pin) on the throttle plate pin 2, with control closure valve block aperture.Torsion spring 7 one ends are fixed on the other end on the tb and are fixed on the tooth sector 6d on the throttle plate pin; Idle adjusting device 11 structures are: regulate screw 11a outward and be screwed on the tb, interior adjusting screw 11b is screwed in the outer screw 11a inner chamber of regulating, push rod 11d places the outer screw inner chamber of regulating, one shoulder is arranged on the push rod, (right-hand among Fig. 3 before the shoulder, stretch out from the opening of outer adjusting screw push rod outer end down together), the diameter of this shoulder greater than this opening diameter less than the outer intracavity diameter of regulating, spring 11c at outer adjusting screw inner chamber, lean and be compressed between push rod shoulder and the interior adjusting screw; The tooth sector 6d that the push rod outer end is resisted against on the throttle plate pin 2 goes up (referring to Fig. 4).Under the acting in conjunction of push rod and torsion spring, make the closure valve block when no motor driving, be in a small aperture position, so that motor has the function of " limp-home ".Torsion spring has two-way answer moment of torsion, can guarantee that doing the time spent in no external force is returned to the default position that closure is in crack state from any position of standard-sized sheet or full cut-off, and the torque curve slope unanimity of torsion spring, idle adjusting device is by the highest and minimum idle position of push rod adjustment throttle body, to guarantee its traffic requirement.Referring to Fig. 3, preferably, there is a tube coupling front portion of interior adjusting screw 11b, and the tube coupling external diameter is less than interior adjusting screw external diameter, and push rod rear portion (left among Fig. 3) stretches among this tube coupling versatilely, on the anterior tube coupling of the interior adjusting screw of spring 11c snare; Better, the push rod upper shoulder is made up of the back front portion less than shoulder greater than the rear portion rear portion and diameter with the rear section, and spring 11c snare is on this front portion, back.Also we can say, push rod is made up of four not isometrical cylindrical bodys, from after be successively forward: rear portion (diameter minimum, in stretching in the anterior tube coupling of adjusting screw), the back is anterior (after the shoulder, diameter greater than the rear portion less than shoulder), shoulder (diameter maximum), anterior (diameter is less than the outer screw openings diameter of regulating, and the outer screw inner chamber of regulating is stretched out in its outer end).

The power interface circuit of the circuit of throttle position sensor 10 and interface thereof and direct current generator all is integrated on the shell 12; One output interface 5 is arranged on the shell, and throttle position sensor can adopt existing contact-type or contactless, and as requested, determines its mounting point.Shell 12 is arranged on the tb, is used for the two-stage reduction gears mechanism is encapsulated.Be fixed with torsion spring rotary stopper block 8 (, reaching the maximum opening of restriction closure valve block) on the tb by restriction torsion spring end positions as control closure valve block maximum opening.In addition, parts are arranged among Fig. 1: pressing plate 13, positioning adapter 16.

Accelerator pedal position sensor can transmit the signal that a throttle is trampled the depth and speed, this signal can be received and understand by single-chip microcomputer, adjust accordingly according to working condition signal then, send the control command drive motor again, make the driving torque of motor output, through the two poles of the earth reduction gear, drive the closure valve block fast or relax open it should open angle.

Claims

1, a kind of electronic air throttle body, comprise tb, be contained in the closure valve block on the air suction passage, the throttle plate pin of fixed knot valve valve block on it, direct current generator, with the reduction gears mechanism of transmission of torque to throttle plate pin, its signal exports the throttle position sensor of single-chip microcomputer to, it is characterized in that, also has torsion spring (7), torsion spring one end is fixed on the tb, and the other end is fixed on the gear on the throttle plate pin; Also has idle adjusting device (11): regulate screw (11a) outward and be screwed on the tb (1), interior adjusting screw (11b) is screwed in outer screw (11a) inner chamber of regulating, push rod (11d) places and outer regulates the screw inner chamber, a shoulder arranged on it, stretch out from the opening of outer adjusting screw (11a) push rod outer end before the shoulder, the diameter of this shoulder greater than this opening diameter less than the outer screw intracavity diameter of regulating, spring (11c) at outer adjusting screw inner chamber, lean and be compressed between push rod shoulder and the interior adjusting screw; The push rod outer end is resisted against on the gear on the described throttle plate pin (2), and when no motor driving, makes the closure valve block be in a small aperture position.

2, throttle body according to claim 1, it is characterized in that, there is a tube coupling front portion of adjusting screw (11b) in described, the tube coupling external diameter is less than interior adjusting screw external diameter, push rod (11d) rear portion is stretched among this tube coupling versatilely, and spring (11c) snare is on the anterior tube coupling of interior adjusting screw (11b).

3, throttle body according to claim 2 is characterized in that, described push rod (11d) upper shoulder is made up of the back front portion less than shoulder greater than the rear portion rear portion and diameter with the rear section, and spring (11c) snare is on this front portion, back.

4, according to claim 1 or 2 or 3 described throttle bodies, it is characterized in that, described reduction gears mechanism is the two-stage reduction gears mechanism: the engagement of motor gear (6a) and gearwheel (6b) is meshing with each other with coaxial mounted small gear of gearwheel (6b) (6c) and the tooth sector (6d) that is installed on the throttle plate pin (2).

5, throttle body according to claim 4 is characterized in that, also is provided with the shell (12) that is used for the encapsulation of two-stage reduction gears mechanism on the described tb (1).

6, throttle body according to claim 5 is characterized in that, described throttle position sensor (10) is installed on the shell (12).

7, throttle body according to claim 6, it is characterized in that, the circuit of described throttle position sensor (10) and interface thereof are integrated among the interface box (5) with the power interface circuit of direct current generator, and interface box is fixed on the shell (12), and an output interface (5) is arranged on the shell.

8, throttle body according to claim 7 is characterized in that, also is fixed with the torsion spring rotary stopper block (8) as control closure valve block maximum opening on the described tb (1).