CN104061037A - Actuating fluid supply system for variable valve - Google Patents
Actuating fluid supply system for variable valve Download PDFInfo
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- CN104061037A CN104061037A CN201410116538.9A CN201410116538A CN104061037A CN 104061037 A CN104061037 A CN 104061037A CN 201410116538 A CN201410116538 A CN 201410116538A CN 104061037 A CN104061037 A CN 104061037A
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Abstract
The invention discloses an actuating fluid supply system for a variable valve. The actuating fluid supply system comprises an executive device and a fluid supply device, wherein the executive device comprises a control valve block, a valve driver and at least one valve; the fluid supply device comprises a first pump, a second pump, a first fluid supply channel, a second fluid supply channel, a main fluid supply channel, a main fluid return channel, an oil tank, a power source and a flowing control device; the power source is used for driving the first pump and the second pump; the flowing control device is used for controlling the flowing directions of fluids in the first fluid supply channel and the second fluid supply channel. Through the mode, the actuating fluid supply system can control the flow rate of the main fluid supply channel according to the requirement on actual working conditions, is simple to operate, lowers energy consumption of a variable valve system and improves the work efficiency of the variable valve system.
Description
Technical field
The present invention relates to a kind of variable valve actuation fluid feed system.
Background technique
People are using and are developing timing and the lift that various variable valve systems are effectively controlled valve, improve performance, fuel economy, injection and other characteristics of motor.Valve wherein can be the traditional intake valve of motor and exhaust valve, also can be to be specifically designed to the device of controlling gas shape fuel, according to device or the driver controlled, these systems mainly can be divided into (electrohydraulic) and electromagnetism (electromagnetic) form machinery, electric liquid.According to the scope of controlling, can be divided into the form of lift range variable and timing, Variable Valve Time and lift range variable.They also can be divided into strap cam (cam-based) and without the form of cam (camless), electricity liquid need to provide larger output power without the fluid supply apparatus of cam variable valve system, and output power is the product of delivery pressure or system pressure and flow.System pressure is wherein generally far above the pressure of traditional combustion engine lubrication system.In order to reduce variable valve system energy consumption, fluid supply apparatus wherein should can change according to the difference of the pressure of actuating device and traffic demand as far as possible.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of simple to operate, flow rate controllability good, the energy consumption of variable valve system is low, working efficiency is high variable valve actuation fluid feed system.Particularly, how to utilize the pump (being metering pump) with fixed volume discharge capacity to meet the flow system flow demand changing, reduce system load or energy consumption simultaneously, improve the working efficiency of variable valve system.
For solving the problems of the technologies described above, the invention provides a kind of variable valve actuation fluid feed system, comprising: actuating device and fluid supply apparatus,
Described actuating device comprises control valve piece, valve actuation device and at least one valve, and described valve actuation device is used for driving described valve, and described valve actuation device is connected with described control valve piece,
Described fluid supply apparatus comprises that the first pump, the second pump, first supply runner, main for runner, main backflow road, fuel tank, power source and flow control apparatus for runner, second,
Described fuel tank is connected with described the second pump with described the first pump, is used to described the first pump and described the second pump that fluid is provided,
Described first is connected to described the first pump and described main between runner for runner, and described second is connected to described the second pump and described main between runner for runner,
The described main runner that supplies is connected with described control valve piece, and for described actuating device provides fluid,
Described main backflow road is connected between described control valve piece and described fuel tank, and for described actuating device provides backflow approach,
Described power source connects described the first pump and described the second pump, for driving described the first pump and described the second pump,
Described flow control apparatus is at least connected for one of runner with second for runner with described first, for controlling the wherein flow direction of fluid.
In one embodiment of the invention, described fluid supply apparatus also comprises system pressure controller, and described system pressure controller is connected with the described main runner that supplies, described main for the hydrodynamic pressure in runner for controlling.
In one embodiment of the invention, described control valve piece comprises system valve piece and at least one air valve piece, and described at least one air valve piece is connected with described system valve piece.
In one embodiment of the invention, described valve actuation device comprises air inlet driver, and described valve comprises intake valve, and described air inlet driver is used for driving at least one intake valve.
In one embodiment of the invention, described valve actuation device comprises air exhaust actuator, and described valve comprises exhaust valve, and described air exhaust actuator is used for driving at least one exhaust valve.
In one embodiment of the invention, described fluid supply apparatus also comprises live axle, and described live axle connects power source, the first pump and the second pump simultaneously, and described power source drives the first pump and the second pump by described live axle simultaneously.
In one embodiment of the invention, described power source comprises engine-driving source, and described engine-driving source is connected with described the second pump with described the first pump.
In one embodiment of the invention, described flow control apparatus comprises the first unloading valve and the first one-way valve,
Described the first one-way valve is connected to described first on runner, for preventing that fluid is from described main for runner the extremely described first refluence for runner,
Described the first unloading valve is connected for runner with first, for when it is opened, is short-circuited to fuel tank, for described the first pump is laid down load by described first for runner.
In one embodiment of the invention, described flow control apparatus comprises the second unloading valve and the second one-way valve,
Described the second one-way valve is connected to described second on runner, for preventing that fluid is from described main for runner the extremely described second refluence for runner,
Described the second unloading valve is connected for runner with second, for when it is opened, by described second, for runner, is short-circuited to fuel tank, is that the second pump is laid down load.
In one embodiment of the invention, described flow control apparatus comprises selector valve, and described selector valve is three-position four-way valve,
The four-way of described selector valve refers to: for runner, is connected for runner with second for runner, fuel tank, first with main respectively,
Three of described selector valve refer to:
(1) when selector valve is positioned at first, the first pump is by off-load, and the flow of the second pump is effective,
(2) when selector valve is positioned at second, the flow of the first pump is effective, and the second pump is by off-load,
(3), when selector valve is positioned at the 3rd, the flow of the first pump and the second pump is all effective.
In one embodiment of the invention, described power source comprises engine-driving source and motor driver, and described engine-driving source is used for driving the first pump, and described motor driver is used for driving the second pump.
In one embodiment of the invention, the rotating speed of described motor driver is adjustable.
In one embodiment of the invention, described flow control apparatus comprises the second one-way valve, and described the second one-way valve is connected to described second on runner, for preventing that fluid is from described main for runner the extremely described second refluence for runner.
In one embodiment of the invention, described flow control apparatus comprises the first one-way valve, and described the first one-way valve is connected to described first on runner, for preventing that fluid is from described main for runner the extremely described first refluence for runner.
In one embodiment of the invention, described flow control apparatus comprises the first unloading valve, and described the first unloading valve is connected for runner with first, for when it is opened, is short-circuited to fuel tank, for described the first pump is laid down load by described first for runner.
In one embodiment of the invention, described power source also comprises clutch, and described clutch is connected between described engine-driving source and described the first pump, for controlling the working state of described the first pump.
In one embodiment of the invention, described system pressure controller is a kind of in fixed relief valve and adjustable relief valve.
In one embodiment of the invention, described the first pump and described the second pump have different volumetric displacements.
The invention has the beneficial effects as follows: variable valve actuation fluid feed system of the present invention can be according to the demand of actual conditions, control flow or the flow direction of the first pump and the second pump, simple to operate, reduced the energy consumption of variable valve system, improved the working efficiency of variable valve system.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also according to these accompanying drawings, obtain other accompanying drawing, wherein:
Fig. 1 is variable valve actuation fluid feed system embodiment's one of the present invention structural representation;
Fig. 2 is the structural representation of fluid supply apparatus in variable valve actuation fluid feed system embodiment two of the present invention;
Fig. 3 is the structural representation of fluid supply apparatus in variable valve actuation fluid feed system embodiment three of the present invention;
Fig. 4 is the structural representation of fluid supply apparatus in variable valve actuation fluid feed system embodiment four of the present invention;
Fig. 5 is the structural representation of fluid supply apparatus in variable valve actuation fluid feed system embodiment five of the present invention;
In accompanying drawing, the mark of each parts is as follows: 10, actuating device; 12, system valve piece; 14, suction valve piece; 16, outlet valve piece; 18, air inlet driver; 20, intake valve; 22, air exhaust actuator; 24, exhaust valve; 30(302,303,304,305), fluid supply apparatus; 32, the first pump; 34, the second pump; 36, engine-driving source; 38, the first unloading valve; 40, the second unloading valve; 42, system pressure controller; 44, the first one-way valve; 46, the second one-way valve; 48, live axle; 50, fuel tank; 52, main for runner; 54, main backflow road; 56, first for runner; 58, second for runner; 60, selector valve; 601, first; 602, second; 603, the 3rd; 66, motor driver; 68, clutch.
Embodiment
Below the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Embodiment based in the present invention, those of ordinary skills, not making all other embodiments that obtain under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Refer to Fig. 1, a kind of variable valve actuation fluid feed system, comprising: actuating device 10 and fluid supply apparatus 30.
Described actuating device 10 comprises control valve piece, valve actuation device and valve.Described valve actuation device is used for driving described valve, and described valve actuation device is connected with described control valve piece.
As shown in Figure 1, described control valve piece comprises system valve piece 12, suction valve piece 14 and outlet valve piece 16, and described suction valve piece 14 is all connected with described system valve piece 12 with outlet valve piece 16.
Described valve actuation device comprises eight air inlet drivers 18 and eight air exhaust actuators 22, and described valve comprises eight intake valves 20 and eight exhaust valves 24, and described air inlet driver 18 is for driving into valve 20, and described air exhaust actuator 22 is for driving exhaust valve 24.
The traffic demand of actuating device 10 at least comprises the summation of the traffic demand of all air inlet drivers 18 and air exhaust actuator 22, and the traffic demand of each driver depends on its mode of operation and lift to a great extent.Mode of operation is whether finger actuator is in the door model of stopping the supple of gas or steam, some Variabale valve actuation system can allow part valve always in closed condition, such as one that only employs in each cylinder in one of two intake valves 20 wherein and two exhaust valves 24, now the flow of whole system need to reduce by half substantially.
In addition, some Variabale valve actuation system can help to realize cylinder deactivation function, such as four cylinders of motor when the low load can be cut off two, to improve the thermal efficiency of this motor, now at least half driver is in the door model of stopping the supple of gas or steam, and the flow of whole system needs also corresponding minimizing.In some Variabale valve actuation system, driver adopts switchable small one and large one two-stage lift, and lift refers to range or aperture when valve is opened, such as big or small lift can be respectively 9 mm and 5 mm, or be respectively 10 mm and 5 mm, or be respectively 8 mm and 1 mm.In general, engine speed or load need adopt larger lift while increasing, and now flow system flow needs also to increase thereupon.Certainly, along with the raising of engine speed, the frequency of utilization of driver, flow system flow demand generally also improve linearly, the good news is that the output flow of the pump being moved by engine direct tape splicing also improves linearly, can mutually mate with it.
In a word, the certain vicissitudinous traffic demand of actuating device 10, consider and the traffic demand of the substantially linear direct ratio of engine speed and the coherence of deliverability, along with actuating device 10 or the wherein mode of operation of driver and the variation of lift, fluid supply apparatus 30 should or be tried one's best by corresponding displacement variation, to guarantee the normal work of system, and reduce system energy consumption.
Described fluid supply apparatus comprises that the first pump 32, the second pump 34, first supply runner 58, main for runner 52, main backflow road 54, fuel tank 50, power source and flow control apparatus for runner 56, second.
Described fuel tank 50 is connected with described the second pump 34 with described the first pump 32, is used to described the first pump 32 and described the second pump 34 that fluid is provided.
Described first is connected to described the first pump 32 and described main between runner 52 for runner 56, and described second is connected to described the second pump 34 and described main between runner 52 for runner 58.
Described be mainly connected with described control valve piece for runner 52, and provide fluid for described actuating device 10.
Described main backflow road 54 is connected between described control valve piece and described fuel tank 50, and provides backflow approach for described actuating device 10.
Described power source connects described the first pump 32 and described the second pump 34, for driving described the first pump 32 and described the second pump 34.
Described flow control apparatus is at least connected for one of runner 58 with second for runner 56 with described first, for controlling wherein flow direction and the flow of fluid.
Described fluid supply apparatus also comprises system pressure controller 42, and described system pressure controller 42 is connected with the described main runner 52 that supplies, described main for the hydrodynamic pressure in runner 52 for controlling.
Described power source comprises engine-driving source 36, and described fluid supply apparatus also comprises live axle 48, and described engine-driving source 36 is connected with described the second pump 34 with described the first pump 32, by live axle 48, drives described the first pump 32 and described the second pump 34 simultaneously.
Described engine-driving source 36 can be engine output shaft (being bent axle), can be also the driving source being connected with output shaft machinery, such as, motor front-end wheel system (Engine Front End Accessory Drive).
Described flow control apparatus also comprises the first unloading valve 38 and the first one-way valve 44.Described the first one-way valve 44 is connected to described first on runner 56, for preventing that fluid is from the described main runner 52 that supplies to the described first refluence for runner 56.Described the first unloading valve 38 is connected for runner 56 with first, can, when it is opened, be short-circuited to fuel tank 50, for described the first pump 32 is laid down load by described first for runner 56.Now, the theoretical system volumetric displacement of fluid supply apparatus 30 is the volumetric displacement of the second pump 34.
Described flow control apparatus comprises the second unloading valve 40 and the second one-way valve 46.Described the second one-way valve 46 is connected to described second on runner 58, for preventing that fluid is from the described main runner 52 that supplies to the described second refluence for runner 58.Described the second unloading valve 40 is connected for runner 58 with second, can when it is opened, by described second, for runner 58, be short-circuited to fuel tank 50, is that the second pump 34 is laid down load.Now, the theoretical system volumetric displacement of fluid supply apparatus 30 is the volumetric displacement of the second pump 34.
As shown in Figure 1, described power source is used for regulation and control fluid flow together with flow control apparatus.Described power source is controlled the flow of the first pump 32 and the second pump 34, respectively fluid is delivered to first from fuel tank 50 and for runner 58, the first, for runner 56 and second, is merged into main for runner 52 for runner 58 for runner 56 and second.Main runner 52 and the main backflow road 54 of supplying is connected with actuating device 10, fluid supply and backflow approach are provided to respectively actuating device 10.The first pump 32 and the second pump 34 wherein all have fixing volumetric displacement, and they are metering pumps, and their changes in flow rate realizes by the velocity variations of power source.Meanwhile, flow control apparatus control first is for runner 56 and the second runner direction for runner 58 inner fluids, and whether off-load oil sump tank still collaborates for runner 52 with main, with this, further controls main flow or the system effective discharge supplying in runner 52.
As shown in Figure 1, to be used for control system together with flow control apparatus main for the flow in runner 52 for described power source.Described power source provides power for the first pump 32 and the second pump 34, respectively fluid from fuel tank 50 deliver to first for runner 56 and second for runner 58.Described flow control apparatus be used for controlling first for runner 56 and second for runner 58 separately with the main through-flow state for runner 52, main for the flow in runner 52, i.e. effective system flow to be controlled at.Main runner 52 and the main backflow road 54 of supplying is connected with actuating device 10, and fluid supply and backflow approach is provided to respectively actuating device 10.The first pump 32 and the second pump 34 wherein all have fixing volumetric displacement, and they are metering pumps.
Again as shown in Figure 1, air inlet driver 18 and air exhaust actuator 22 drive respectively intake valve 20 and the exhaust valve 24 of motor.Eight air inlet drivers 18 are all connected with suction valve piece 14, and realize necessary fluid communication by suction valve piece 14.Eight air exhaust actuators 22 are all connected with outlet valve piece 16, and realize necessary fluid communication by outlet valve piece 16.Suction valve piece 14 is further connected with system valve piece 12 with outlet valve piece 16, realizes necessary fluid communication.System valve piece 12 generally contains various system fluid controls function; According to changeable air valve design and the requirement controlled, controlling function or device (in figure, not indicating) may comprise: the take a seat speed control or COMM communication or back pressure of pressure control or adjusting, pressure surge elimination, accumulation of energy or flowed fluctuation elimination, valve lift control or COMM communication, valve is controlled.
In structure and function, system valve piece 12 is not necessarily got very clear with the border of suction valve piece 14 and outlet valve piece 16.In the middle of their any two, even they three may be the structure (not indicating in figure) of one.Above-mentioned system controller also can need to be contained in any one valve piece according to control requirement or space layout.Therefore, system valve piece 12, suction valve piece 14 and outlet valve piece 16 can be regarded as to an integral body or a valve piece.
Again as shown in Figure 1, engine-driving source 36 drives the first pump 32 and the second pump 34 by live axle 48 simultaneously, respectively fluid is delivered to first from fuel tank 50 and for runner 58, the first, for runner 56 and second, is merged into main for runner 52 for runner 58 for runner 56 and second.Main runner 52 and the main backflow road 54 of supplying is communicated with actuating device 10 fluids, fluid supply and backflow approach is provided to respectively actuating device 10.On main confession runner 52, side has connect system pressure controller 42, and system pressure controller 42 can be but be not limited to the fixed relief valve shown in Fig. 1.System pressure controller 42 can be adjustable relief valve or other more complicated pressure controller.
When the first unloading valve 38 is opened, can for runner 56, be short-circuited to fuel tank 50 by first, be that the first pump 32 is laid down load.Now, the first one-way valve 44 under reverse differential pressure in closed condition, to prevent that the fluid of all the other systems from pouring in down a chimney into first in runner 56 and the first unloading valve 38 of opening.
When the second unloading valve 40 is opened, can for runner 58, be short-circuited to fuel tank 50 by second, be that the second pump 34 is laid down load.Now, the second one-way valve 46 under reverse differential pressure in closed condition, to prevent that the fluid of all the other systems from pouring in down a chimney into second in runner 58 and the second unloading valve 40 of opening.
The theoretical delivery Qt of a pump equals the product of its volumetric displacement D and rotational speed N, if the unit of volumetric displacement D be milliliter/turn (ml/rev), the unit of rotational speed N is rev/min (rev/m), and the unit of theoretical delivery Qt is liter/min (l/m), a Qt=DN/1000.General actual flow Q is less than theoretical delivery Qt, and their ratio is called volumetric efficiency, because of the internal leakage of pump, makes volumetric efficiency be less than 100%.
If the volumetric displacement of the first pump 32 and the second pump 34 is respectively D1 and D2, suppose equal volumetric efficiency, under same rotating speed, their actual flow ratio Q1/Q2 equals their volumetric displacement ratio D1/D2.Selectively, the first pump 32 and the second pump 34 also can have identical or different volumetric displacement D1 and D2.
Working principle embodiment illustrated in fig. 1:
If the first pump 32 and the second pump 34 have identical volumetric displacement (being D1=D2), fluid supply apparatus 30 has two grades of system bulk discharge capacities, has two grades of Systems Theory flows under the rotational speed N of setting:
Each is opened and closed to (1) first unloading valve 38 and the second unloading valve 40, and system bulk discharge capacity is D1, and Systems Theory flow is N * D1,
(2) first unloading valves 38 and the second unloading valve 40 are all closed, and system bulk discharge capacity is 2 * D1, and Systems Theory flow is 2 * N * D1.
If the first pump 32 and the second pump 34 have different volumetric displacements, such as D1 > D2, fluid supply apparatus 30 has third gear system bulk discharge capacity, has the third gear Systems Theory flow increasing successively under the rotational speed N of setting:
(1) first unloading valve 38 is opened, and the second unloading valve 40 cuts out, and system bulk discharge capacity is D2, and Systems Theory flow is N * D2,
(2) first unloading valves 38 cut out, and the second unloading valve 40 is opened, and system bulk discharge capacity is D1, and Systems Theory flow is N * D1,
(3) first unloading valves 38 cut out, and the second unloading valve 40 cuts out, and system bulk discharge capacity is D1+D2, and Systems Theory flow is N * (D1+D2).
Therefore under same rotating speed, fluid supply apparatus 30 at least can provide three grades of different discharge capacities to meet the demand of actuating device 10.
Certainly in the present embodiment one: set variable valve system and drive into valve 20 and exhaust valve 24 simultaneously, in some application of reality, variable valve system may only drive into valve 20 or only drive exhaust valve 24.Fig. 1 also represents always to have eight intake valves 20 and eight exhaust valves 24, and each cylinder has two intake valves 20 and two exhaust valves 24, so motor has four cylinders.The applicable motor car engine of commonly use or the present invention is not limited to four cylinders, can be also three cylinders, six cylinders, eight cylinders, twelve-cylinder etc.The valve number of every cylinder is also not limited to four valves, can be also two valves, three valve etc.
In the present embodiment 1, by engine-driving source 36, by live axle 48, drive the first pump 32 and the second pump 34 simultaneously, respectively fluid is delivered to first from fuel tank 50 and supply runner 58 for runner 56 and second.By the first unloading valve 38 and the first one-way valve 44, control whereabouts and the load condition of the first pump 32 outputs, thereby reach, control the first pump 32 and the first effective discharge for runner 56.Same, by the second unloading valve 40 and the second one-way valve 46, control whereabouts and the load condition of the second pump 34 outputs, thereby reach, control the second pump 34 and the second effective discharge for runner 58.Finally realized the whereabouts of controlling the first pump 32 and the second pump 34 fluids, wherein by after short circuit directly the fluid of oil sump tank 50 by step-down, reduced the energy consumption of load and the variable valve system of pump, improved the working efficiency of variable valve system.
Embodiment two
A variable valve actuation fluid feed system, comprising: actuating device 10 and fluid supply apparatus 302, it is that from embodiment one difference its fluid supply apparatus 302 is different with the fluid supply apparatus 30 in embodiment one.
As shown in Figure 2, fluid supply apparatus 302 comprises that the first pump 32, the second pump 34, first supply runner 58, main for runner 52, main backflow road 54, system pressure controller 42, fuel tank 50, engine-driving source 36 and live axle 48 for runner 56, second, its structure, connection mode and working principle are all identical with embodiment one, are not repeated herein.
Fluid supply apparatus 302 is with embodiment one difference, is controlled whereabouts and the load condition of the first pump 32 and the second pump 34 flows in flow control apparatus by selector valve 60.Described selector valve 60 is three-position four-way valve,
The four-way of described selector valve 60 refers to: for runner 56, be connected for runner 58 with second for runner 52, fuel tank 50, first with main respectively.The main backflow of the piggybacking road 54 as shown in Figure 2 that is connected of selector valve 60 and fuel tank 50, also can complete directly or indirectly by other runner.
Three of described selector valve 60 refer to:
(1) selector valve 60 be positioned at first 601 o'clock, first communicates with fuel tank 50 for runner 56, therefore the first pump 32 is by off-load, second communicates with the main runner 52 that supplies for runner 58, so the flow of the second pump 34 is effective,
(2) when selector valve 60 is positioned at second 602, first communicates for runner 52 with main for runner 56, and therefore the flow of the first pump 32 is effective, and second communicates with fuel tank 50 for runner 58, so the second pump 34 is by off-load,
(3) selector valve 60 be positioned at the 3rd 603 o'clock, first all communicates with the main runner 52 that supplies for runner 58 for runner 56 and second, so the flow of the first pump 32 and the second pump 34 is all effective.
As can be seen here, in the present embodiment 2, by selector valve 60, realize whereabouts and the load condition of controlling the first pump 32 and the second pump 34 flows, reduced the energy consumption of variable valve system, improved the working efficiency of variable valve system.
Embodiment three
A variable valve actuation fluid feed system, comprising: actuating device 10 and fluid supply apparatus 303, it is that from embodiment one difference its fluid supply apparatus 303 is different with the fluid supply apparatus 30 in embodiment one.
Again as shown in Figure 3, in the present embodiment three and embodiment one difference, be: except engine-driving source 36, its power source also comprises motor driver 66.Described engine-driving source 36 is used for driving the first pump 32, and described motor driver 66 is used for driving the second pump 34.Due to 66 controllabilitys at aspects such as rotating speeds of motor driver described in power source, in embodiment three, flow control apparatus can adjust accordingly or simplify, such as saving the first unloading valve 38, the second unloading valve 40 and the first one-way valve 44 adopting in embodiment one.
Embodiment three does not have unloading valve, and main be the summation of the first pump 32 flows and the second pump 34 flows for the flow in runner 52 always.Engine-driving source 36 is for driving the first pump 32, and always in power coupled condition.As long as motor does not stop, the output of the first pump 32 is effective always.Described motor driver 66 rotating speeds are controlled the flow of the second pump 34 adjustablely.When the rotating speed of described motor driver 66 is zero time, the flow of the second pump 34 is zero, and in order to prevent that fluid from flowing backwards into second for runner 58 for runner 52 from main, embodiment three has settled the second one-way valve 46.
Embodiment four
A variable valve actuation fluid feed system, comprising: actuating device 10 and fluid supply apparatus 304, it is that from embodiment's three differences its fluid supply apparatus 304 is different with the fluid supply apparatus 303 in embodiment three.
As shown in Figure 4, fluid supply apparatus 304 comprises that main runner 52, main backflow road 54, the system pressure controller 42, first of supplying supplies runner 58, the first pump 32, the second pump 34, engine-driving source 36, motor driver 66, the second one-way valve 46 and fuel tank 50 for runner 56, second, its structure, connection mode and working principle are all identical with embodiment three, are not repeated herein.
Again as shown in Figure 4, the present embodiment four is with embodiment three difference:
First: described power source also comprises clutch 68, described clutch 68 is connected between described engine-driving source 36 and described the first pump 32, for controlling the working state of described the first pump 32.
Clutch 68, under it closes the state of closing, keeps the transmission of power from engine-driving source 36 to first pumps 32.Clutch 68, under its separated state, cuts off the transmission of power from engine-driving source 36 to first pumps 32.Therefore whether in running orderly, by clutch 68, be used for controlling the first pump 32.
In the present embodiment four, by clutch 68, control the working state of the first pump 32, thereby control the first pump 32, whether have flow output.Identical with embodiment's three principles, described motor driver 66 rotating speeds are controlled the flow of the second pump 34 adjustablely.Finally, according to real system requirement, by engine-driving source 36, clutch 68 and motor driver 66, regulate the total discharge of the first pump 32 and the second pump 34, reduced the energy consumption of variable valve system, improved the working efficiency of variable valve system.
Second: described flow control apparatus comprises the first one-way valve 44, described the first one-way valve 44 is connected to described first on runner 56, for preventing that when clutch 68 is separated fluid is from the described main runner 52 that supplies to the described first refluence for runner 56.
Embodiment five
A variable valve actuation fluid feed system, comprising: actuating device 10 and fluid supply apparatus 305, it is that from embodiment four difference its fluid supply apparatus 305 is different with the fluid supply apparatus 304 in embodiment four.
As shown in Figure 5, fluid supply apparatus 305 comprises that main runner 52, main backflow road 54, the system pressure controller 42, first of supplying supplies runner 58, the first pump 32, the second pump 34, engine-driving source 36, motor driver 66, the first one-way valve 44, the second one-way valve 46 and fuel tank 50 for runner 56, second, its structure, connection mode and working principle are all identical with embodiment four, are not repeated herein.
Again as shown in Figure 5, the present embodiment five is with embodiment four difference: described flow control apparatus comprises the first unloading valve 38, described the first unloading valve 38 is connected for runner 56 with first, for when it is opened, by described first, for runner 56, be short-circuited to fuel tank 50, for described the first pump 32 is laid down load.The first unloading valve 38 in embodiment five has replaced the clutch 68 in embodiment four to come to the first pump 32 off-loads.
Wherein, motor driver 66 can be an independently electric motor, or is held a concurrent post by electric engine starter.Described electric engine starter can be different from as required traditional starter in structure and control logic.Described motor driver 66 rotating speeds are adjustable, can have following function:
(1), while not needing the flow of the second pump 34, can turn off motor driver 66, to reduce system power dissipation;
(2), when other normally moves, motor driver 66 can at random provide rational flow by adjusting rotating speed.The first pump 32 is normal for fluid, and the second pump 34 can be supplied according to the variation of system load the flow of extra needs;
(3) under some operating mode, also can open the first unloading valve 38 and realize the first pump 32 off-loads, only by the second pump 34, provide flow
(4), when engine start or before starting, rotatable motor driver 66 is with in advance or help to pressurize to system.
In the present embodiment five, by engine-driving source 36, drive the first pump 32, by the first unloading valve 38, control flow whereabouts and the load condition of the first pump 32.By motor driver 66, drive the working state of the second pump 34 and control the second pump 34, and by the adjustable rotating speed of motor driver 66, control as requested the flow of the second pump 34.The present embodiment five has reduced the energy consumption of variable valve system, has improved the working efficiency of variable valve system.
Therefore, a kind of variable valve actuation fluid feed system of the present invention by multiple driving source and switchover apparatus in power source, drive and control there is the first pump of fixed volume discharge capacity, the working state of the second pump, and in flow control apparatus, by multiple fluid direction, switch or relief arrangement is controlled flow whereabouts and the pressure state of the first pump, the second pump, thereby reach, control the main object for runner flow, reduce the energy consumption of variable valve system, improved the working efficiency of variable valve system.With respect to variable displacement pump, metering pump general structure form is many, simple in structure, reliable, volume is little, easy design and manufacture, cost is low, working pressure is high or volumetric efficiency is high.The present invention can allow two metering pumps that variable flow is provided by suitably combining driving, switching and control gear, substantially meets the requirement of Variabale valve actuation system, and reduces system load as far as possible.
Be different from prior art, variable valve actuation fluid feed system of the present invention can be controlled flow or the unloading condition of the first pump and the second pump according to the demand of actual conditions, simple to operate, reduce the energy consumption of variable valve system, improved the working efficiency of variable valve system.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (18)
1. a variable valve actuation fluid feed system, is characterized in that, comprising: actuating device and fluid supply apparatus,
Described actuating device comprises control valve piece, valve actuation device and at least one valve, and described valve actuation device is used for driving described valve, and described valve actuation device is connected with described control valve piece,
Described fluid supply apparatus comprises that the first pump, the second pump, first supply runner, main for runner, main backflow road, fuel tank, power source and flow control apparatus for runner, second,
Described fuel tank is connected with described the second pump with described the first pump, is used to described the first pump and described the second pump that fluid is provided,
Described first is connected to described the first pump and described main between runner for runner, and described second is connected to described the second pump and described main between runner for runner,
The described main runner that supplies is connected with described control valve piece, and for described actuating device provides fluid,
Described main backflow road is connected between described control valve piece and described fuel tank, and for described actuating device provides backflow approach,
Described power source connects described the first pump and described the second pump, for driving described the first pump and described the second pump,
Described flow control apparatus is at least connected for one of runner with second for runner with described first, for controlling the wherein flow direction of fluid.
2. variable valve actuation fluid feed system according to claim 1, it is characterized in that, described fluid supply apparatus also comprises system pressure controller, and described system pressure controller is connected with the described main runner that supplies, described main for the hydrodynamic pressure in runner for controlling.
3. variable valve actuation fluid feed system according to claim 1, is characterized in that, described control valve piece comprises system valve piece and at least one air valve piece, and described at least one air valve piece is connected with described system valve piece.
4. variable valve actuation fluid feed system according to claim 1, is characterized in that, described valve actuation device comprises air inlet driver, and described valve comprises intake valve, and described air inlet driver is used for driving at least one intake valve.
5. variable valve actuation fluid feed system according to claim 1, is characterized in that, described valve actuation device comprises air exhaust actuator, and described valve comprises exhaust valve, and described air exhaust actuator is used for driving at least one exhaust valve.
6. according to the arbitrary described variable valve actuation fluid feed system of claim 1 to 5, it is characterized in that, described fluid supply apparatus also comprises live axle, described live axle connects power source, the first pump and the second pump simultaneously, and described power source drives the first pump and the second pump by described live axle simultaneously.
7. variable valve actuation fluid feed system according to claim 6, is characterized in that, described power source comprises engine-driving source, and described engine-driving source is connected with described the second pump with described the first pump.
8. variable valve actuation fluid feed system according to claim 6, is characterized in that, described flow control apparatus comprises the first unloading valve and the first one-way valve,
Described the first one-way valve is connected to described first on runner, for preventing that fluid is from described main for runner the extremely described first refluence for runner,
Described the first unloading valve is connected for runner with first, for when it is opened, is short-circuited to fuel tank, for described the first pump is laid down load by described first for runner.
9. variable valve actuation fluid feed system according to claim 6, is characterized in that, described flow control apparatus comprises the second unloading valve and the second one-way valve,
Described the second one-way valve is connected to described second on runner, for preventing that fluid is from described main for runner the extremely described second refluence for runner,
Described the second unloading valve is connected for runner with second, for when it is opened, by described second, for runner, is short-circuited to fuel tank, is that the second pump is laid down load.
10. variable valve actuation fluid feed system according to claim 6, is characterized in that, described flow control apparatus comprises selector valve, and described selector valve is three-position four-way valve,
The four-way of described selector valve refers to: for runner, is connected for runner with second for runner, fuel tank, first with main respectively,
Three of described selector valve refer to:
(1) when selector valve is positioned at first, the first pump is by off-load, and the flow of the second pump is effective,
(2) when selector valve is positioned at second, the flow of the first pump is effective, and the second pump is by off-load,
(3), when selector valve is positioned at the 3rd, the flow of the first pump and the second pump is all effective.
11. according to the arbitrary described variable valve actuation fluid feed system of claim 1 to 5, it is characterized in that, described power source comprises engine-driving source and motor driver, and described engine-driving source is used for driving the first pump, and described motor driver is used for driving the second pump.
12. variable valve actuation fluid feed systems according to claim 11, is characterized in that, the rotating speed of described motor driver is adjustable.
13. variable valve actuation fluid feed systems according to claim 11, it is characterized in that, described flow control apparatus comprises the second one-way valve, and described the second one-way valve is connected to described second on runner, for preventing that fluid is from described main for runner the extremely described second refluence for runner.
14. variable valve actuation fluid feed systems according to claim 11, it is characterized in that, described flow control apparatus comprises the first one-way valve, and described the first one-way valve is connected to described first on runner, for preventing that fluid is from described main for runner the extremely described first refluence for runner.
15. variable valve actuation fluid feed systems according to claim 11, it is characterized in that, described flow control apparatus comprises the first unloading valve, described the first unloading valve is connected for runner with first, for when it is opened, by described first, for runner, be short-circuited to fuel tank, for described the first pump is laid down load.
16. variable valve actuation fluid feed systems according to claim 11, it is characterized in that, described power source also comprises clutch, and described clutch is connected between described engine-driving source and described the first pump, for controlling the working state of described the first pump.
17. variable valve actuation fluid feed systems according to claim 2, is characterized in that, described system pressure controller is a kind of in fixed relief valve and adjustable relief valve.
18. variable valve actuation fluid feed systems according to claim 1, is characterized in that, described the first pump and described the second pump have different volumetric displacements.
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| CN201410116538.9A CN104061037A (en) | 2014-03-27 | 2014-03-27 | Actuating fluid supply system for variable valve |
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| CN115013108A (en) * | 2022-07-20 | 2022-09-06 | 山东大学 | Internal combustion engine hydraulic valve mechanism with variable opening times |
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Application publication date: 20140924 |