EP3268648A1 - Valve for adapting the engine flow rate - Google Patents
Valve for adapting the engine flow rateInfo
- Publication number
- EP3268648A1 EP3268648A1 EP16713522.7A EP16713522A EP3268648A1 EP 3268648 A1 EP3268648 A1 EP 3268648A1 EP 16713522 A EP16713522 A EP 16713522A EP 3268648 A1 EP3268648 A1 EP 3268648A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- engine
- coolant
- heat exchanger
- control means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
- F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
- F16K31/52416—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve comprising a multiple-way lift valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
Definitions
- a heat engine comprises, in a manner known per se, a cooling circuit for evacuating the heat produced by its operation. More specifically, the engine has pipes in its housing and its cylinder head to be traversed by coolant. A discharge pump located upstream of the engine ensures the circulation of the coolant in the engine tubes.
- the liquid outlet of the engine is connected to an output housing including a valve as described in FR2955168 and a corresponding temperature measuring device.
- the valve is in connection with a radiator whose function is to cool the coolant.
- the radiator has an outlet connected to an inlet of the discharge pump via a liquid inlet manifold and another outlet connected to the inlet of a degassing housing.
- the degassing box removes bubbles of gas present in the coolant. Gas bubbles appear in the coolant punctually when the engine is hot or when there is a filling fault or a malfunction of the engine. The degassed coolant is then piped to the coolant inlet manifold.
- This inlet manifold also connects an outlet of the valve to an inlet of the discharge pump via a short-circuit conduit which allows short-circuit the radiator.
- the valve also comprises a coolant outlet pipe for supplying a coolant heater whose function is to generate heating in the passenger compartment of the motor vehicle.
- the coolant recovered at the outlet of the heater is returned to the discharge pump via the inlet manifold.
- the valves of the state of the art can control the flow of the coolant when the branch of the radiator is closed.
- the abbreviations Qmot, Qaero, Qcc and Qrad respectively correspond to the flow rate of the motor
- the flow rate of the heater, the flow in the short-circuit duct and the flow rate in the radiator when the branch of the radiator opens, the flow circulating in the engine is maximum.
- Such a configuration does not allow to reach optimum cooling temperatures of the engine.
- At least three outlet ports intended to be in communication respectively with a first heat exchanger, such as a radiator, a second heat exchanger such as a heater, and a short-circuit conduit, and
- a first heat exchanger such as a radiator
- a second heat exchanger such as a heater
- a short-circuit conduit
- shut-off elements actuated by control means for selectively opening or closing an associated outlet orifice
- control means is configured to allow at least two different opening positions of the closure elements associated with said first heat exchanger and said short-circuit conduit, so as to obtain at least two liquid flow rates different cooling in said engine in particular when there is a circulation of coolant in a branch of the first heat exchanger (the radiator).
- the invention thus makes it possible to modify the flow rate and the temperature of the engine during the regulation phase when the radiator branch is open. Controlling the motor flow makes it possible to limit the hydraulic torque of the discharge pump and to keep the combustion chamber wall temperature high in order to limit the friction between the piston rings and the cylinder and to improve the combustion efficiency.
- the coolant circulation flow rate is selectable according to a control law.
- said control law is based on a coolant temperature in the exchangers and / or an external temperature and / or an oil temperature and / or a material temperature of the estimated engine or measured.
- material temperature means the temperature of one of the parts of the engine, for example the cylinder head or the housing.
- said control means are configured to allow a low flow rate in said engine particularly when there is a circulation of coolant in a branch comprising the first heat exchanger.
- said control means are configured to allow a high flow rate in said heat engine especially when there is a circulation of coolant in a branch. having the first heat exchanger.
- the thresholds depend on a load and / or a speed of said engine.
- valve used according to the invention is selected from the following types of valves: a ball valve, a rotary disk valve, a valve cam valve or a slide valve or sliding elements mobile (still called “slider” valve).
- said control means are constituted by at least at least three cam profiles each associated with one of the shutter elements.
- a cam profile may have a circular shape with locally one or more lobes.
- Another profile may have an oval-shaped shape, centered or off-center with respect to its axis of rotation.
- said three cam profiles belong to a single cam.
- said control means are actuated by a single actuator.
- the invention also relates to a motor vehicle heat engine cooling circuit comprising a valve as previously defined.
- the invention also relates to a method of controlling a valve for a motor vehicle heat engine cooling circuit such as previously defined, characterized in that said method comprises a step of selecting a position among at least two different opening positions of the closure elements associated with said first heat exchanger and said short circuit conduit, so as to obtain a flow rate among at least two different coolant flow rates in said heat engine, especially when there is a circulation of cooling liquid in a branch containing said first heat exchanger.
- the method is applicable to two different positions of openings of the closure elements.
- the method applies regardless of the type of valve used, including one of those mentioned above.
- Figure 1 is a diagram showing the flow rates through the various elements of the cooling circuit according to the cam angle of the valve according to the state of the art for a motor speed of the order of 3000 rpm;
- Figure 2 is a schematic functional representation of a cooling circuit provided with a valve according to the present invention.
- Figures 3a to 3e are schematic representations of the different positions of a valve according to the present invention during the various phases of operation of the cooling circuit;
- Figure 4 is a diagram showing the flow rates through the various elements of the cooling circuit according to the cam angle of the valve according to the present invention for an engine speed of the order of 3000 revolutions per minute.
- FIG. 1 shows a block diagram of a cooling circuit 10 comprising a delivery pump 1 1 situated upstream of the heat engine 12 which ensures the circulation of a coolant, such as a mixture of water and antifreeze, in the tubes of the engine 12.
- a coolant such as a mixture of water and antifreeze
- the liquid outlet of the engine 12 is connected to an output housing 13 including a valve 16 described in more detail below and a corresponding temperature measuring device 23 (not shown).
- the outlet housing 13 is in communication with a radiator 17 whose function is to cool this liquid.
- the radiator 17 has an outlet connected to an inlet of the discharge pump 1 1 via a coolant inlet manifold 18 and another outlet connected to the inlet of a degassing housing 19.
- the housing degassing 19 allows to remove gas bubbles present in the coolant. Gas bubbles appear in the coolant, in particular during a filling fault or during a malfunction of the engine 12.
- the degassed coolant is then conveyed by means of a pipe to the inlet manifold 18 of the engine. cooling liquid.
- This inlet manifold 18 also connects an output of the valve 16 to an inlet of the discharge pump 1 1 via a short-circuit conduit 21 which allows short-circuiting the radiator 17.
- the closed loop thus achieved allows the temperature rise of the liquid flowing in the pump 1 1, the short-circuit conduit 21, and the housing and / or the cylinder head of the engine 12.
- the valve 16 is also connected to a coolant outlet pipe for supplying a heater 22 with coolant whose function is to generate heating in the passenger compartment of the motor vehicle.
- the coolant recovered at the outlet of the heater 22 is returned to the delivery pump 1 1 via the inlet manifold 18.
- the circuit 10 may comprise a dedicated branch 26 provided with an additional pump for discharging the cooling liquid from the engine. a water / oil exchanger from the engine 12 to the turbocharger 25 to cool it when the latter is stopped.
- the valve 16 comprises an inlet port 28 to be connected to a coolant outlet of the engine 12, and three outlet ports 29a-29c intended to be in communication respectively with the heater 22, the short-circuit conduit 21, and the radiator 17.
- Shut-off elements 30a-30c each associated with an outlet orifice 29a-29c are actuated by control means 31 for selectively opening or closing an associated outlet port 29a-29c.
- Each closure element 30a-30c is movable between at least one opening position in which the closure element 30a-30c allows the circulation of liquid in the associated outlet pipe, and a closing position in which the shutter member 30a-30c bears against a corresponding seat so that the shutter member 30a-30c blocks the flow of fluid.
- the control means 31 are constituted by three cam profiles 31a-31c each associated with one of the shutter elements 30a-30c.
- the three cam profiles 31a-c belong to a single rotary cam.
- the three cams 31a-31c each belong to a different cam.
- the cam profile 31 has, as can be seen in Figure 3a, has a substantially circular contour centered on the axis of the actuator 32 (which represents its axis of rotation, with a projection creating locally two lobes.
- the cam profiles 31b and 31c each have an oval-shaped contour, off-center with respect to the axis of the actuator 32 (which represents its axis of rotation).
- control means 31 are constituted by the displacement of one or more sliders to ensure an axial displacement of the different closure elements 30a-30c relative to their seat.
- the control means 31a-31c are preferably actuated by a single actuator 32.
- a so-called preheating phase P0 all the closure elements 30a-30c are initially in the closed position as shown in FIG. 3a.
- the shutter member 30a associated with the heater 22 is then opened as shown in Figure 3b to create a first coolant loop.
- the corresponding flow Qaéro then increases gradually inside the heater 22 to reach a maximum value (see Figure 4).
- the shutter element 30b associated with the short-circuit conduit 21 is then opened as shown in FIG. 3c to create a second coolant loop.
- the corresponding flow Qcc then increases progressively inside the short-circuit conduit 21 to reach a floor value.
- the shutter member 30c associated with the radiator 17 opens to allow the circulation of liquid inside the circulation branch having the radiator 17 and the element 18 (inlet manifold), and if necessary the degassing housing 19 to loop back to the motor 12. This allows to take calories from the coolant. Then enters the temperature control phases P1, P1 '.
- the coolant flow rate in the engine 12 is selected according to a control law.
- This control law is based on a coolant temperature in the exchangers 17, 22 and / or an external temperature and / or an oil temperature and / or an engine material temperature 12 estimated or measured.
- control means 31a-31c are configured to allow a high flow rate in the heat engine 12 (see phase P1).
- the control means 31a-31c are moved in rotation, so that the shutter elements 30b and 30c respectively associated with the short-circuit conduit 21 and the radiator 17 are in a position of large aperture while the shutter member 30a associated with the heater 22 remains in an open position, as shown in Figure 3d.
- control means 31a-31c are configured to allow a low flow rate in the heat engine 12 (see phase P1 ').
- the control means 31a-31c are displaced, so that the shutter elements 30b and 30c associated respectively with the short-circuit conduit 21 and the radiator 17 are in a position of small opening, while that the shutter member 30a associated with the heater 22 remains in an open position, as shown in Figure 3e.
- the temperature thresholds considered depend preferably on a load and / or a speed of the heat engine 12.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Temperature-Responsive Valves (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1552047A FR3033616B1 (en) | 2015-03-12 | 2015-03-12 | MOTOR FLOW ADAPTER VALVE |
PCT/FR2016/050399 WO2016142600A1 (en) | 2015-03-12 | 2016-02-22 | Valve for adapting the engine flow rate |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3268648A1 true EP3268648A1 (en) | 2018-01-17 |
Family
ID=53496749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16713522.7A Withdrawn EP3268648A1 (en) | 2015-03-12 | 2016-02-22 | Valve for adapting the engine flow rate |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3268648A1 (en) |
FR (1) | FR3033616B1 (en) |
WO (1) | WO2016142600A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201902769D0 (en) | 2019-03-01 | 2019-04-17 | Univ Court Of The Univ Of Aberdeen | Antibody molcules and uses thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB808592A (en) * | 1955-10-07 | 1959-02-04 | Ronald Greville Dennys | Hydraulic selector valve |
DE10304837A1 (en) * | 2003-02-06 | 2004-08-19 | Robert Bosch Gmbh | Valve with full closure, especially for motor vehicle cooling and/or heating system, has arrangement for enabling relative position of valve bodies in valve chamber to be varied via actuator |
FR2955168B1 (en) * | 2010-01-14 | 2012-02-10 | Mann & Hummel Gmbh | CONTROL VALVE FOR LIQUID CIRCULATION CIRCUIT |
DE102013107293B4 (en) * | 2013-07-10 | 2020-02-20 | Pierburg Gmbh | Control valve unit for cooling circuits of a motor vehicle |
-
2015
- 2015-03-12 FR FR1552047A patent/FR3033616B1/en active Active
-
2016
- 2016-02-22 EP EP16713522.7A patent/EP3268648A1/en not_active Withdrawn
- 2016-02-22 WO PCT/FR2016/050399 patent/WO2016142600A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
FR3033616B1 (en) | 2019-08-02 |
WO2016142600A1 (en) | 2016-09-15 |
FR3033616A1 (en) | 2016-09-16 |
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