CN1264785A - Electronically controlled hydraulically-driven common-pipe (tracl) air inlet and exhaustion system for IC engine - Google Patents
Electronically controlled hydraulically-driven common-pipe (tracl) air inlet and exhaustion system for IC engine Download PDFInfo
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- CN1264785A CN1264785A CN 00114442 CN00114442A CN1264785A CN 1264785 A CN1264785 A CN 1264785A CN 00114442 CN00114442 CN 00114442 CN 00114442 A CN00114442 A CN 00114442A CN 1264785 A CN1264785 A CN 1264785A
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Abstract
An electronically-controlled and hydraulically driven air inlet and exhaustion system with common pipe (tracl) for IC engine is composed of air inlet-exhuastion unit, hydraulic controller and electronic controller, and servces to flexibly regulate the air valve of IC engine in time according to its rotation speed, load, boosting pressure, atmosphere temp and humidity and the characteristics of IC engine for optimal working condition. It is especially suitable for 4-stroke diesel engine.
Description
The present invention relates to the inlet and exhaust system of internal-combustion engine, particularly relate to a kind of inlet and exhaust system that can be used for replacing traditional cam-actuated mechanical internal-combustion engine, especially relate to the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness (rail) of four-cycle diesel.
The inlet and outlet timing of internal-combustion engine and lasting angle thereof are to the Economy of its fuel oil, and power and emission performance thereof have very big influence.Power performance, economic performance and emission performance that good inlet and outlet timing and lasting angle thereof can be improved internal combustion engine greatly.Especially in highly supercharged diesel engine, owing to cam profile can not change with operating mode, Quan therefore can't in the operating mode scope, optimize its performance.In the patent that some have been announced, as US4930464, US5456221, US5193495, US2930464 etc., some of its exploitation are automatically controlled, by the valve gear of hydraulic pressure or pneumatic drive, realized the hydraulic pressure of inlet and outlet timing or pneumatic electronic control.But some problems of their ubiquities perhaps will be punched on cylinder head and be arranged air flue or oil duct, make the structure of former motor, and especially cylinder head is changed too big; Or to use two kinds of work liquids (gas and hydraulic oil) to make system too complicated; Perhaps to use plural solenoid valve and one-way valve to realize and too expensive to the control of one group of inlet and outlet valve.In a word, its complex structure, wayward, be difficult to realize existing traditional non-automatically controlled internal-combustion engine is reequiped to automatically controlled internal-combustion engine.
The object of the present invention is to provide a kind of can be according to the feature of operating modes such as the rotating speed of internal-combustion engine, load and internal-combustion engine, valve timing to internal-combustion engine can be done soft readjustment, so that it is issued to optimization in various operating modes, thereby improve the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness (rail) of engine performance.
The object of the present invention is achieved like this:
The present invention is made up of intake and exhaust device, hydraulic control device, electronic control unit etc.
The air valve seat of intake and exhaust device is to process on cylinder head.A spring holder is equipped with in the valve rod upper end, and one group of return spring is arranged under the spring holder, and the other end of return spring is supported on the cylinder head.
The top of air valve stem is a hydraulic control device.Comprise power piston, power piston chamber, damper piston, damper piston chamber, push rod, push rod chamber, compress double-screw bolt, upper shell, positioning block, solenoid valve, safety valve, pump, the shared pipe of high pressure, return tube, fuel tank etc.Power piston, damper piston and push rod form sliding pair with power piston chamber, damper piston chamber and push rod chamber respectively, and reciprocating therein respectively.Power piston contacts with damper piston at the place, bottom surface, and damper piston contacts with push rod at the place, bottom surface.Push rod contacts with valve rod at the place, lower end surface.
Compressing double-screw bolt is connected with upper shell.Therefore positioning block, upper shell, power piston and sleeve form the hydraulic driving chamber of power piston.On the wall of chamber, be furnished with an oilhole, an end of oilhole is communicated with the hydraulic driving chamber, and the other end is connected with the driving mouth of solenoid valve.
Damper piston is divided into epicoele and cavity of resorption (buffer cavity) two-part with the chamber thorax.Upper top and middle part in the damper piston chamber are respectively equipped with pore.
One end of the pore of the upper top in damper piston chamber communicates with atmosphere, and the other end communicates with epicoele, and this makes epicoele and atmosphere keep being communicated with always, and the variation in pressure in the reason chamber does not influence the motion of damper piston.
One end of the pore at the middle part in damper piston chamber communicates with atmosphere, and the other end communicates with cavity of resorption (buffer cavity).When power piston drives damper piston and air valve moves downward, when making the lower edge of damper piston cover the hole, cavity of resorption then forms a cushion seal chamber.Air in the buffer cavity is compressed, and pressure improves gradually with the increase of the open area of air valve.Like this, when damper piston came downwards to the lower edge and touches the bottom surface of buffer cavity, the pressure in the buffer cavity can provide a cushion effect preferably to damper piston, thereby can reduce the mechanical shock of the lower edge of damper piston to the buffer cavity bottom surface.Because the pressure in the buffer cavity acts on the lower end surface of damper piston, in the process that air valve is closed, can also accelerate the speed that air valve is closed.
The bottom of push rod is provided with one and puts residual hole, and its end is communicated with atmosphere at lower end surface place, and the other end then is communicated with buffer cavity during in closed position when air valve.The pore at the middle part in damper piston chamber also just communicates with atmosphere at this moment, and water and oil in the buffer cavity then can be emitted by putting residual hole, and block in the next push rod chamber by lower shell body of other state, can keep buffer cavity to seal when air valve moves like this.
Be equipped with on the solenoid valve and drive mouth, oil-feed port and three passages of return opening.Oil-feed port is connected with the shared pipe of high pressure, and return opening is connected to fuel tank.Like this when the control signal that receives from electronic control unit, solenoid valve just optionally will drive mouthful and oil-feed port or return opening conducting, carry out the opening and closing action of air valve.
Operating oil pressure in the shared pipe of high pressure is provided and is subjected to the control of electronic control unit by pump, safety valve is connected across between delivery side of pump and the return tube, when system oil pressure surpasses a certain pressure oil is let out to fuel tank.
Electronic control unit is made up of single-chip microcomputer, program storage, data storage, data driving chip, latch, decoder, keyboard and display controller, nixie tube, sensor etc.
Single-chip microcomputer is connected with latch, program storage, data storage and keyboard display controller by P3, P4 mouth.Decoder is deciphered high 5 of 16 bit address lines, by pin CS1 gated data storage, shows and KBC by pin CS2 gating, by pin CS1 gating program storage.Keyboard and display controller are connected with four nixie tubes by pin OUTA0～OUTA3 and pin OUTB0～OUTB3 respectively.
The pin HSI.1 of single-chip microcomputer is connected with speed probe, pin ACH0 is connected with load sensor, pin HSI.2 is connected with the upper dead center position sensor, pin ACH1 is connected with boost-pressure sensor, pin ACH2 is connected with atmosphere temperature transducer, pin ACH3 is connected with the atmospheric moisture sensor, and pin HSI.3 is connected with displacement transducer.The pin HSO.1 of single-chip microcomputer provides the suction valve control signal, and pin HSO.2 provides the outlet valve control signal.
Electronic control unit can be experienced the signal that is transmitted by speed probe, load sensor, upper dead center position sensor in real time, and according to gained rotating speed and load signal and be stored in the reference value that arteries and veins spectrogram in the data storage obtains a desirable inlet and outlet timing; Experience the plenum pressure signal that transmits by boost-pressure sensor simultaneously, and signal is determined a corresponding correction value with the boost pressure correction value arteries and veins spectrogram that is stored in the data storage thus, then this correction value is added on the reference value; Atmospheric temperature and moisture signal that impression is transmitted by atmosphere temperature transducer and atmospheric moisture sensor, and signal and the atmospheric conditions correction value arteries and veins spectrogram that is stored in the data storage are determined a corresponding correction value thus, also be added to this correction value on the reference value, thereby obtain the last expected value of inlet and outlet timing, and determine to deliver to the burst length of drive signal of solenoid valve and the actual value of pulsewidth thus, and, realize the open and close of air valve with this actual value driving solenoid valve.Electronic control unit can also be experienced the signal that is transmitted valve lift by displacement transducer simultaneously, and shows by nixie tube.
When solenoid valve receive electronic control unit open valve signal the time, an oil-feed port and a driving mouthful conducting, working oil enters actuator chamber, act on the hydraulic coupling on the upper-end surface of power piston, driving power piston, damper piston, push rod and air valve overcome the tight power of giving of return spring and move downward, and finish the action of opening valve.When the lower edge of damper piston touches the bottom surface in damper piston chamber, the air valve stop motion, and keep full-gear.
When solenoid valve receives the signal that the air valve of electronic control unit closes, drive mouth no longer with the oil-feed port conducting, and with the return opening conducting.Air valve is under the effect of the spring force of return spring, working oil in the actuator chamber is arranged to fuel tank by driving mouth, return opening, air valve and power piston, damper piston, push rod are moved upward together, finish the action of closing gas check valve, and make air valve remain on closed condition.
When solenoid valve receive again electronic control unit open valve signal the time, then enter and open the circulation that valve closes valve next time.
The present invention is owing to only use hydraulic oil to have following characteristics: an actuator chamber is all arranged and be subjected to hydraulically powered power piston for each air valve to be driven.Can make the power piston motion to open air valve like this.It keeps the return spring of air valve, can make air valve finish closing motion like this.System also is provided with damping device, makes the power piston can stop motion when moving to the air valve maximum lift and don't have very big impact force.The feature of signals such as the rotating speed of the motor that the present invention can collect according to electronic control unit, load and motor, determine predetermined inlet and outlet timing, obtain the opening and closing timing of the best under the actual conditions and continue the angle according to parameter corrections such as atmospheric conditionss then, then its control signal is delivered to solenoid valve, the flow direction of controlling liquid liquid, drive the motion of power piston and air valve, finish its keying.So just, can realize Flexible Control to valve timing and lasting angle thereof.
The present invention has an actuator chamber and is subjected to hydraulically powered power piston for each air valve to be driven.Arrange oil duct owing to need on cylinder head, punch, only use a kind of work liquid of hydraulic oil and a solenoid valve, therefore have simple in structure, be convenient to reequip, expense is cheap, be easy to advantage such as control.The feature of signals such as the rotating speed of the motor that the present invention can collect according to electronic control unit, load and motor, determine predetermined inlet and outlet timing, obtain the opening and closing timing of the best under the actual conditions and continue the angle according to parameter corrections such as atmospheric conditionss then, then its control signal is delivered to solenoid valve, the flow direction of controlling liquid liquid, drive the motion of power piston and air valve, finish its keying.So just, can realize Flexible Control to valve timing and lasting angle thereof.
The present invention will be described in more detail below in conjunction with drawings and Examples:
Fig. 1 is the schematic representation with the hydraulically powered diesel engine inlet and exhaust system of electronically controlled condominium (rail);
Fig. 2 is the schematic representation when opening with the hydraulically powered diesel engine inlet and exhaust system of electronically controlled condominium (rail) air valve;
The schematic representation of Fig. 3 when closing with the hydraulically powered diesel engine inlet and exhaust system of electronically controlled condominium (rail) air valve;
Fig. 4 is with the hydraulically powered diesel engine inlet and exhaust system of electronically controlled condominium (rail) electronic control unit flow chart;
Fig. 5 is the schematic representation with the hydraulically powered diesel engine inlet and exhaust system of electronically controlled condominium (rail) electronic control unit.
The present invention is further detailed explanation below in conjunction with embodiment and accompanying drawing:
The top of air valve stem 50 is a hydraulic control device.By power piston 25, power piston chamber 26, damper piston 18, damper piston chamber 11, push rod 15, push rod chamber 41, compress double-screw bolt 46, upper shell 24, positioning block 27, solenoid valve 34, safety valve 6, pump 5, the shared pipe 38 of high pressure, return tube 52, fuel tank 3 etc. and form.Power piston 25, damper piston 18 and push rod 15 form sliding pair with power piston chamber 26, damper piston chamber 11 and push rod chamber 41 respectively, and reciprocating therein respectively.20 places contact with damper piston 18 power piston 25 in the bottom surface, and 19 places contact with push rod 15 damper piston 18 in the bottom surface.51 places contact with valve rod 50 push rod 15 in the lower end surface.
Compressing double-screw bolt 46 is connected with upper shell 24.Therefore positioning block 27, upper shell 24, power piston 25 and sleeve 32 form the hydraulic driving chamber 38 of power pistons 25.On chamber wall 33, be furnished with an oilhole 29, an end 31 of oilhole 29 is communicated with hydraulic driving chamber 38, and the other end 30 is connected with the driving mouth 35 of solenoid valve 34.
One end of the pore 21 of the upper top in damper piston chamber communicates with atmosphere, and the other end communicates with epicoele 49, and this makes epicoele 49 and atmosphere keep being communicated with always, and the variation in pressure in the reason epicoele 49 does not influence the motion of damper piston 18.
One end of the pore 12 at the middle part in damper piston chamber communicates with atmosphere, and the other end communicates with cavity of resorption (buffer cavity) 42.When power piston 25 drives damper pistons 18 and air valve 40 moves downward, when making the lower edge 45 of damper piston 18 cover pore 12,42 of cavity of resorptions (buffer cavity) form a cushion seal chamber.Air in the cavity of resorption (buffer cavity) 42 is compressed, and pressure improves gradually with the increase of the open area of air valve.Like this, when damper piston 18 comes downwards to lower edge 45 and touches the bottom surface 14 of cavity of resorption (buffer cavity) 42, pressure in the cavity of resorption (buffer cavity) 42 can provide a cushion effect preferably to damper piston 18, thereby can reduce the mechanical shock of the 45 pairs of cavity of resorptions in lower edge (buffer cavity) bottom surface 14 of damper piston 18.Because the pressure in the cavity of resorption (buffer cavity) 42 acts on the lower end surface 19 of damper piston 18, in the process that air valve 40 is closed, has also accelerated the speed that air valve 40 is closed.
The bottom of push rod 15 is provided with one and puts residual hole 16, and its end is communicated with atmosphere at 51 places, and the other end then is communicated with cavity of resorption (buffer cavity) 42 during in closed position when air valve 40.This moment, pore 12 also just communicated with atmosphere, water and oil in the cavity of resorption (buffer cavity) 42 then can be emitted by putting residual hole 16, and block in the next push rod chamber 41 by lower shell body 10 of other state, can keep cavity of resorption (buffer cavity) 42 when air valve 40 motions, to seal like this.
Operating oil pressure in the shared pipe of high pressure 38 provides and is subjected to the control of electronic control unit 4 by pump 5, and safety valve 6 is connected across between the outlet 53 and return tube 52 of pump 5, oil is let out to fuel tank 3 during above a certain pressure at system oil pressure.
Single-chip microcomputer 71 is by P3, P4 mouth 719 (AD0～AD15) be connected with latch 74, program storage 72, data storage 73 and keyboard display controller 76.High 5 the 753 (AD11～AD15) decipher of 75 pairs 16 bit address lines 79 of decoder, by pin CS1 (751) gated data storage 73, show and KBC 76 by pin CS2 (752) gating, by pin CS1 (753) gating program storage 74.Keyboard and display controller 76 are respectively by pin 761 (OUTA0～OUTA3) and pin 762 (OUTB0～OUTB3) be connected with four nixie tubes 77.
Speed probe 81 is connected with the pin 711 (HSI.1) of single-chip microcomputer 71, load sensor 82 is connected with the pin 712 (ACH0) of single-chip microcomputer 71, upper dead center position sensor 83 is connected with the pin 713 (HSI.2) of single-chip microcomputer 71, boost-pressure sensor 84 is connected with the pin 714 (ACH1) of single-chip microcomputer 71, atmosphere temperature transducer 85 is connected with the pin 715 (ACH2) of single-chip microcomputer 71, atmospheric moisture sensor 86 is connected with the pin 716 (ACH3) of single-chip microcomputer 71, and displacement transducer 87 is connected with the pin 710 (HSI.3) of single-chip microcomputer 71.Suction valve control signal 88 is provided by the pin 717 (HSO.1) of single-chip microcomputer 71, and outlet valve control signal 89 is by pin 718 HSO.2 of single-chip microcomputer 71) provide.
When solenoid valve 34 receives the air valve start signal of electronic control unit 4, an oil-feed port 36 and driving mouthful 35 conductings, working oil enters actuator chamber 38, act on the hydraulic coupling on the upper-end surface 20 of power piston 25, driving power piston 25, damper piston 18, push rod 15 and air valve 40 overcome the tight power of giving of return spring 80 and move downward, and finish the action of opening valve.
When the lower edge 45 of damper piston 18 touches the bottom surface 14 in damper piston chamber 11, air valve 40 stop motions, and keep full-gear.
When solenoid valve 34 receives the signal that the air valve of electronic control unit 4 closes, drive mouthfuls 35 no longer with oil-feed port 36 conductings, and with return opening 37 conductings, as Fig. 3.Air valve 40 is under the effect of the spring force of return spring 80, working oil in the actuator chamber 38 is arranged to operating oil tank by driving mouth 35, return opening 37, air valve 40 and power piston 25, damper piston 18, push rod 15 are moved upward together, finish the action of closing gas check valve 40, and make air valve 40 remain on closed condition.
When solenoid valve 34 receive again electronic control unit 4 open valve signal the time, then enter and open the circulation that valve closes valve next time.
Claims (10)
1, the electronically controlled condominium of a kind of usefulness (rail) is hydraulically powered advances, vent systems, by intake and exhaust device, hydraulic control device, electronic control unit compositions such as (4), it is characterized in that: hydraulic control device comprises power piston (25) in the top of air valve stem (50), power piston chamber (26), damper piston (18), damper piston chamber (11), push rod (15), push rod chamber (41), compress double-screw bolt (46), upper shell (24), positioning block (27), solenoid valve (34), safety valve (6), pump (5), the shared pipe of high pressure (38), return tube (52), fuel tank (3) etc.
2, the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness according to claim 1 (rail) is characterized in that: the air valve seat of described intake and exhaust device (65) is to process on cylinder head (60); A spring holder (70) is equipped with in valve rod (50) upper end, and one group of return spring (80) is arranged under the spring holder (70), and the other end of return spring (80) is supported on the cylinder head (60).
3, the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness according to claim 1 and 2 (rail) is characterized in that: the power piston of described hydraulic control device (25), damper piston (18) and push rod (15) form sliding pair with power piston chamber (26), damper piston chamber (11) and push rod chamber (41) respectively; Power piston (25) in the bottom surface (20) locate to contact with damper piston (18), damper piston (18) in the bottom surface (19) locate to contact with push rod (15); Push rod (15) in the lower end surface (51) locate to contact with valve rod (50).
4, the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness according to claim 3 (rail) is characterized in that: the damper piston of described hydraulic control device (18) is divided into epicoele (49) and cavity of resorption (buffer cavity) (42) two-part with damper piston chamber thorax (11); Upper top and middle part in damper piston chamber (11) are respectively equipped with pore (21) and pore (12).
5, the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness according to claim 3 (rail) is characterized in that: the double-screw bolt (46) that compresses of described hydraulic control device is connected with upper shell (24); Positioning block (27), upper shell (24), power piston (25) and sleeve (32) form the hydraulic driving chamber (38) of power piston (25); On chamber wall (33), be furnished with an oilhole (29), an end (31) of oilhole (29) is communicated with hydraulic driving chamber (38), and the other end (30) is connected with the driving mouth (35) of solenoid valve (34).
6, the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness according to claim 3 (rail), it is characterized in that: the bottom of the push rod of described hydraulic control device (15) is provided with one and puts residual hole (16), its end locates to be communicated with atmosphere in (51), and the other end then is communicated with cavity of resorption (buffer cavity) (42) during in closed position when air valve (40).
7, the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness according to claim 3 (rail) is characterized in that: the solenoid valve of described hydraulic control device (34) is furnished with and drives mouthful (35), oil-feed port (36) and (37) three passages of return opening; Oil-feed port (36) is connected with the shared pipe of high pressure (38), and return opening (37) is connected to fuel tank (3); Safety valve (6) is connected across between the outlet (53) and return tube (52) of pump (5).
8, the electronically controlled condominium of usefulness according to claim 1 and 2 (rail) is hydraulically powered advances, vent systems, it is characterized in that: described electronic control unit (4) comprises single-chip microcomputer (71), program storage (72), data storage (73), latch (74), decoder (75), keyboard and display controller (76), nixie tube (77), speed probe (81), load sensor (82), upper dead center position sensor (83) boost-pressure sensor (84) atmosphere temperature transducer (85), atmospheric moisture sensor (86), displacement transducer (87), 8 position datawires (78) (D0～D7), 16 bit address lines (79) (AD0～AD15) etc.
9, the hydraulically powered inlet and exhaust system of the electronically controlled condominium of usefulness according to claim 8 (rail), it is characterized in that: the single-chip microcomputer (71) of described electronic control unit (4) is by (719) (P3, P4 mouth, AD0～AD15) be connected with latch (74), program storage (72), data storage (73) and keyboard display controller (76); Decoder (75) is to high 5 the 753 (AD11～AD15) decipher of 16 bit address lines (79), by (CS1) gated data storage (73) of pin (751), by pin (752) (CS2) gating show and KBC (76), by (CS1) gating program storage (74) of pin (753); Keyboard and display controller (76) are respectively by pin (761) (OUTA0～OUTA3) and pin (762) (OUTB0～OUTB3) be connected with four nixie tubes (77).
10, the electronically controlled condominium of usefulness according to claim 8 (rail) is hydraulically powered advances, vent systems, it is characterized in that: the speed probe (81) of described electronic control unit (4) (HSI.1) is connected with the pin (711) of single-chip microcomputer (71), load sensor (82) (ACH0) is connected with the pin (712) of single-chip microcomputer (71), upper dead center position sensor (83) (HSI.2) is connected with the pin (713) of single-chip microcomputer (71), boost-pressure sensor (84) (ACH1) is connected with the pin (714) of single-chip microcomputer (71), atmosphere temperature transducer (85) (ACH2) is connected with the pin (715) of single-chip microcomputer (71), atmospheric moisture sensor (86) (ACH3) is connected with the pin (716) of single-chip microcomputer (71), and displacement transducer (87) (HSI.3) is connected with the pin (710) of single-chip microcomputer (71).Suction valve control signal (88) is provided by the pin (717) (pin HSO.1) of single-chip microcomputer (71), and outlet valve control signal (89) (HSO.2) is provided by the pin (718) of single-chip microcomputer (71).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00114442A CN1096538C (en) | 2000-03-27 | 2000-03-27 | Electronically controlled hydraulically-driven common-pipe (tracl) air inlet and exhaustion system for IC engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00114442A CN1096538C (en) | 2000-03-27 | 2000-03-27 | Electronically controlled hydraulically-driven common-pipe (tracl) air inlet and exhaustion system for IC engine |
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| Publication Number | Publication Date |
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| CN1264785A true CN1264785A (en) | 2000-08-30 |
| CN1096538C CN1096538C (en) | 2002-12-18 |
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| CN00114442A Expired - Fee Related CN1096538C (en) | 2000-03-27 | 2000-03-27 | Electronically controlled hydraulically-driven common-pipe (tracl) air inlet and exhaustion system for IC engine |
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| DE19543080C2 (en) * | 1995-11-18 | 1999-10-28 | Man B & W Diesel Ag | Device for controlling valves of an internal combustion engine, in particular the gas supply valve of a gas engine |
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