CN101059090A - Auxiliary cam phaser hydraulic circuit and method of operation - Google Patents
Auxiliary cam phaser hydraulic circuit and method of operation Download PDFInfo
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- CN101059090A CN101059090A CNA2007101097108A CN200710109710A CN101059090A CN 101059090 A CN101059090 A CN 101059090A CN A2007101097108 A CNA2007101097108 A CN A2007101097108A CN 200710109710 A CN200710109710 A CN 200710109710A CN 101059090 A CN101059090 A CN 101059090A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/34423—Details relating to the hydraulic feeding circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34483—Phaser return springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Provided is an auxiliary cam phaser hydraulic circuit for an internal combustion engine having an engine driven hydraulic pump and at least one cam phaser in fluid communication with a cam phaser control valve. The auxiliary cam phaser hydraulic circuit includes a reservoir containing fluid and an auxiliary hydraulic pump in fluid communication with the reservoir and operable to pressurize the fluid and communicate the fluid under pressure to a cam phaser feed passage. The cam phaser feed passage is in fluid communication with the cam phaser control valve, which operates to selectively and variably communicate the fluid to the cam phaser. A method of starting and operating an internal combustion engine is also provided. An internal combustion engine incorporating the auxiliary cam phaser hydraulic circuit is also disclosed.
Description
Technical field
The present invention relates to a kind of internal-combustion engine that adopts the hydraulic actuating cam phaser, more particularly, relate to the oil hydraulic circuit of the cam phaser that can be used for activating this hydraulic actuating.
Background technique
Internal-combustion engine can adopt valve train element to change air inlet and/or exhaust valve timing, thereby engine performance and efficient are controlled or optimized.In various variable valve timing apparatus, comprise camshaft phase regulating device or cam phaser, it typically is transmission pulley or similarly form and comprising be used to change the phase change device of the phase place between the output driven member of the input actuator of rotation and coaxial rotation, the input actuator for example is gear, belt pulley or sprocket wheel, and the output driven member for example is a camshaft.Mandate day is that the U.S. Patent No. 5,588,404 on December 31st, 1996 has been described a kind of exemplary cam phaser mechanisms, and this patent is transferred to assignee of the present invention, quotes the full content of this patent by reference at this.
Cam phaser mechanisms overcomes the biasing force of spring usually by hydraulic actuating, thereby changes the phase place of the camshaft that is installed to this mechanism.Usually, provide a control valve that is communicated with the cam phaser fluid, this control valve is used for the pressure fluid of actuating cam phase discriminator and controls cam phaser by providing selectively and changeably.Do not having under the situation of hydrodynamic pressure, spring actuating cam phase discriminator enters acquiescence or " playback " position.Usually select this playback position so that internal-combustion engine can start under utmost point low environment air temperature, this utmost point low environment air temperature for example is-40 degrees centigrade.This playback position can produce high effective compression ratio, thereby can burn under cold ambient air temperature.Because along with the rising of ambient air temperature, the effective compression ratio during starting may reduce, therefore under higher ambient air temperature, this playback position is not best engine start position usually.
Pressure fluid is the form of engine oil normally, and it is sent to cam phaser by IC engine oil pipes or lubricating oil path.Volume-type hydraulic pump is sent to pressure fluid the main lubrication channel of lubricating oil path.Therefore oil hydraulic pump before engine starting, does not provide pressure fluid to cam phaser usually by internal combustion engine drive.Therefore, may before igniting, adjust to the position that is more suitable for cranking internal combustion engine to camshaft phase.
In addition, in case internal-combustion engine is started, need a minimum threshold engine speed to come to provide actuating required fluid flow and pressure usually to cam phaser.This threshold engine rotating speed can be 800 to 1, the 000RPM height, and this is higher than its idling speed for many apparatus of the internal-combustion engine.Therefore, during the idle running of internal-combustion engine, the phase place of camshaft may not be optimised.
Summary of the invention
Therefore, the invention provides a kind of auxiliary cam phaser hydraulic circuit of internal-combustion engine, internal-combustion engine has engine-driven oil hydraulic pump and at least one cam phaser that is communicated with cam phaser control valve fluid.This auxiliary cam phaser hydraulic circuit comprises fluid source and the auxiliary hydraulic pump that holds fluid, and this auxiliary hydraulic pump is communicated with described fluid source fluid.This auxiliary hydraulic pump be used to pressurize described fluid and being in described FLUID TRANSPORTATION pressure under to the cam phaser service duct.This cam phaser service duct is communicated with cam phaser control valve fluid.This cam phaser control valve can be operated selectively and changeably giving described cam phaser described FLUID TRANSPORTATION, thereby effectively activates.
This auxiliary hydraulic pump can be by motoring, and this motor is by electronic control unit controls.In addition, this electronic control unit can be programmed in advance to send instruction to the cam phaser control valve, thereby make at least one cam phaser can carry out intake valve pass in evening and an intake valve operation in the Central Shanxi Plain early, thereby reduce the effective compression ratio during the engine starting.A main lubrication channel can also be provided, be used to receive fluid from engine-driven oil hydraulic pump.This main lubrication channel and cam phaser service duct fluid selectively are communicated with.One-way valve can be constructed to selectively the FLUID TRANSPORTATION of coming autonomous lubrication channel be arrived the cam phaser service duct, stops the FLUID TRANSPORTATION from the cam phaser service duct to arrive main lubrication channel simultaneously basically.Selectively, this service pump can be constructed to by the cam phaser service duct fluid that is under the pressure be offered main lubrication channel.
The present invention also provides the method for a kind of starting and operating internal-combustion engines, and this internal-combustion engine has cam phaser and engine-driven oil hydraulic pump of at least one hydraulic actuating.This method comprises, when engine stops, provides pressure fluid to the cam phaser of at least one hydraulic actuating.In addition, this method also comprises, controls the cam phaser of at least one hydraulic actuating, makes it be operated in intake valve with the manipulation internal-combustion engine and opens with one of intake valve open shop early pattern evening, start this internal-combustion engine then.
This method also comprises, when motor during turning round between idle engine rotating speed and the threshold engine rotating speed, continuing provides pressure fluid to the cam phaser of at least one hydraulic actuating.This threshold engine rotating speed can be such engine speed, and when being lower than this engine speed, engine-driven oil hydraulic pump can not be provided for driving the required fluid flow and the pressure of cam phaser of at least one hydraulic actuating.
By with reference to hereinafter to the detailed description of preferred forms and in conjunction with the accompanying drawings, These characteristics of the present invention and advantage and other characteristics and advantage will become apparent.
Description of drawings
Fig. 1 is according to the present invention, the partial schematic diagram of the internal-combustion engine of diagram auxiliary cam phaser hydraulic circuit; With
Fig. 2 is the method for engine starting shown in Fig. 1 and operation, and it is represented in a flowchart.
Embodiment
With reference to Fig. 1, the schematic representation of the part of its expression internal-combustion engine is represented with reference character 10.This internal-combustion engine 10 comprises cylinder block 12, and this cylinder block has a plurality of cylinders 14.A plurality of hydraulic lash adjusters 16 pass through unshowned valve actuation mechanism cooperating with admission cam shaft 18, thereby the air quantity that measures or the air and the fuel quantity of supply cylinder 14 burning usefulness are provided, and wherein the part of hydraulic lash adjuster and admission cam shaft is shown among Fig. 1.In addition, a plurality of hydraulic lash adjusters 20 pass through unshowned valve actuation mechanism cooperating with exhaust cam shaft 22, thereby discharge products of combustion from cylinder 14, and wherein the part of hydraulic lash adjuster and exhaust cam shaft is shown among Fig. 1.Intake cam phase discriminator 24 is installed on the admission cam shaft 18.Similarly, exhaust cam phaser 26 is installed on the exhaust cam shaft 22.The technician in engine design field will recognize that intake cam phase discriminator 24 and exhaust cam phaser 26 are used for changing respectively intake valve timing and exhaust valve timing.
Internal-combustion engine 10 is four stroke engine, and it has aspirating stroke, compression stroke, expansion stroke or expansion stroke and exhaust stroke.During aspirating stroke, when can be in cylinder the pistons reciprocating (not shown) when top dead center position moves to bottom dead center position, air and fuel are introduced in the cylinder 14.During compression stroke, air and fuel are moved to the Piston Compression of top dead center position from bottom dead center position.During expansion stroke, air and fuel burn, and the products of combustion that expands promotes piston and moves to bottom dead center position from top dead center position rapidly.During exhaust stroke, along with piston from bottom dead center position to the moving of top dead center position, products of combustion is discharged from cylinder 14.Those skilled in the art will recognize that the timing that intake valve is opened incident enters into influence the air quantity of cylinder 14.
Internal-combustion engine 10 also comprises oil groove or container 28, food tray for example, and it can be used for holding the fluid of a constant volume, and for example engine oil 30.Engine-driven oil hydraulic pump 32 is drawn oil 30 by getting oil pipe 34 from container 28.Engine-driven oil hydraulic pump 32 is positive displacement pumps, and its oil 30 that is under the pressure flows to filter 36.Before oil 30 entered main oil gallery 38, filter 36 was removed particulate matter from oil.Main oil gallery 38 is used to provide oil 30 with the moving element in the lubricated internal-combustion engine, for example unshowned camshaft and main bearing.Provide throttle orifice 40 on the part of main oil gallery 38, it is used to limit oil 30 flowing to hydraulic lash adjuster supply loop 42.Hydraulic lash adjuster supply loop 42 comprises connection regulator service duct 44, and it is used for being transported to each of a plurality of connection regulators 20 to oily 30 and being transported to solenoid operated valve 46 from throttle orifice 40.As known to those skilled in the art, a plurality of hydraulic lash adjusters 16 and 20 utilize the compressed oil in the hydraulic lash adjuster service duct 44 to keep the interior suitable gap of valve actuation element of internal-combustion engine 10, and these valve actuation elements do not illustrate in the drawings.
A plurality of hydraulic lash adjusters 16 are called as " conversion " hydraulic lash adjuster.That is to say that according to the hydrodynamic pressure of the oil 30 that is transported to it, hydraulic lash adjuster 16 provides at least two visibly different valve lifts.Solenoid actuated valve 46 is supplied with a plurality of hydraulic lash adjusters 16 to the oil 30 of low voltage value and high-voltage value selectively.Solenoid actuated valve 46 is when primary importance, by the expression of aliging with passage 44 as the valve portion 47 that schematically shows among Fig. 1, the oil 30 in the hydraulic lash adjuster service duct 44 must be earlier by throttle orifice 48 before entering the second hydraulic lash adjuster service duct 50.Throttle orifice 48 is that the oil 30 in the second hydraulic lash adjuster service duct 50 produces the force value that reduces, thereby makes a plurality of hydraulic lash adjusters 16 that the first valve lift value can be provided.In addition, when the force value of oil 30 in the second hydraulic lash adjuster service duct 50 is excessive, pressure relief valve 52 will be discharged to oil 30 in the container 28.Selectively, when solenoid actuated valve 46 is in the second place, align with passage 44 (dotted line) as the valve portion 54 that schematically shows among Fig. 1, oil 30 in the hydraulic lash adjuster service duct 44 will flow to the second hydraulic lash adjuster service duct 50 without restriction, thereby obtain the duaspiracle lift range value.
Cam phaser service duct 56 flows to the first and second cam phaser control valves 58 and 60 to compressed oil respectively from main oil gallery 38.The first and second cam phaser control valves 58 and 60 flow to intake cam phase discriminator 24 and exhaust cam phaser 26 to the oil 30 in the cam phaser service duct 56 respectively selectively and changeably, thereby activate.When not having pressure fluid in service duct 56, air inlet and exhaust cam phaser 24 and 26 will remain on acquiescence or " playback " position.
When engine-driven oil hydraulic pump 32 does not provide enough compressed oil, promptly do not move or during hypotony, the invention provides a kind of auxiliary cam phaser hydraulic circuit 62 and activate air inlet and exhaust cam phaser 24 and 26 when motor.Auxiliary cam phaser hydraulic circuit 62 comprises auxiliary oil hydraulic pump 64, this oil hydraulic pump is drawn oil 30 from container 28, and the oil 30 that is under the pressure flowed to cam phaser service duct 56, flow to the first and second cam phaser control valves 58 and 60 subsequently.Before oil 30 was transported to cam phaser service duct 56, filter 65 was used for from oil 30 separation and removes particulate matter.When not from the compressed oil of engine-driven oil hydraulic pump 32, auxiliary cam phaser hydraulic circuit 62 makes air inlet and exhaust cam phaser 24 and 26 be operated or activate.In a preferred embodiment, Fu Zhu oil hydraulic pump 64 is operated by motor 66.When 64 work of auxiliary oil hydraulic pump, one-way valve 68 can be included in the cam phaser service duct 56, is used to close or forbids oil 30 flowing to main oil gallery 38.But also can save one-way valve 68 provides compressed oil with the oil hydraulic pump 64 that allows to assist to main oil gallery 38, thereby before cranking internal combustion engine 10, other lubricating loops in hydraulic lash adjuster supply loop 42 and the internal-combustion engine 10 is pressurizeed.By providing a certain amount of oily 30 by auxiliary oil hydraulic pump 64 to internal-combustion engine 10, the internal-combustion engine 10 during starts wearing and tearing of inner member is minimized.
Preferably, electronic control unit or ECU70 can control the first and second cam phaser control valves 58 and 60, motor 66 and solenoid actuated valve 46 in response to the input signal 72 of motor, speed changer and/or unshowned vehicle sensors.ECU70 preferably includes programmable digital computer, and its working principle is well known to those skilled in the art.In addition, ECU70 can comprise look-up table and algorithm memory, thereby can accurately control the first and second cam phaser control valves 58 and 60 in response to input signal 72.
Selection to the playback position of air inlet and exhaust cam phaser 24 and 26 is normally such, promptly makes internal-combustion engine 10 to start under low-down ambient air temperature condition, for example-40 degree centigrade.In order to accomplish this point, intake cam phase discriminator 24 is parked in a position to admission cam shaft 18, and this position allows the air of maximum flow to be inhaled in the cylinder 14 during engine start.This makes the effective compression ratio of motor be maximized.The effective compression ratio of internal-combustion engine can be understood that the compression ratio of motor when starting or operation usually, and it can be different from geometrical compression ratio, and geometrical compression ratio calculates by the size value of internal-combustion engine.Effective compression ratio is responsive to the variation of intake valve timing.By introduce the air of maximum flow in the cylinder of internal-combustion engine 10, in-cylinder pressure will increase during compression stroke, so the temperature in the cylinder 14 also raise, thereby make fuel burn effectively under so low ambient air temperature.
Along with the rising of ambient air temperature, making internal-combustion engine 10 effectively start required effective compression ratio can reduce.Therefore, before cranking internal combustion engine, early close the engine operation mode of (EIVC) by activating intake cam phase discriminator 24 to allow intake valve pass in evening (LIVC) or intake valve, cranking internal combustion engine 10 required active forces can reduce.The LIVC operator scheme is regulated the phase place of admission cam shaft 18, thereby allows the intake valve of internal-combustion engine 10 to enter the engine compresses stroke than staying open more lately usually.Therefore, during compression stroke, the part of air that sucks cylinder 14 is released from cylinder 14 to reduce the air supply in the cylinder 14.Selectively, the EIVC operator scheme is regulated the phase place of admission cam shaft 18, thereby allows intake valve earlier than usual during the engine charge stroke of internal-combustion engine 10 to close.Therefore, the air quantity that sucks cylinder 14 is reduced, thereby has reduced the air supply in the cylinder 14 during the compression stroke.When internal-combustion engine 10 shut down, auxiliary cam phaser hydraulic circuit 62 allowed air inlet and exhaust cam phaser 24 and 26 motions.Preferably, ECU70 is programmed to send instruction to the first cam phaser control valve 58 when internal-combustion engine 10 shuts down, is the phase adjusted of intake cam phase discriminator 24 in LIVC and the EIVC operator scheme one, thereby reduces priming power by reducing compression.Authorizing day is the U.S. Patent No. 6 on January 18th, 2005,843,214 pairs are adopted cam phaser to allow LIVC and EIVC operator scheme more detailed description to be arranged, and this patent is transferred to assignee of the present invention, quotes the full content of this patent by reference at this.
Reducing for so-called " the slight mixing " vehicle of internal-combustion engine 10 priming power is especially favourable, and this does not illustrate in the drawings.This slight hybrid vehicle adopts " idling stops " operating mode.Be in operation, when slight hybrid vehicle is in static and internal-combustion engine 10 when being in idling, for example when red light, internal-combustion engine 10 cuts out automatically with fuel saving.Subsequently, when the operator needs vehicle to move, internal-combustion engine 10 by automatic command to reset.Preferably, the starting of internal-combustion engine 10 for the operator, be not aware of good more.
During idle stop mode, auxiliary oil hydraulic pump 64 can be operated with permission intake cam phase discriminator 24 instruction admission cam shafts and change to LIVC or EIVC position, thereby reduces the priming power of internal-combustion engine 10.By reducing the priming power of internal-combustion engine 10, reset relevant noise, vibration and uneven compliance (NVH) with motor and can reduce.In addition, owing to reduced priming power, the size of resetting the dyna-starter of the starter motor of this vehicle or combination can be reduced.
In order to realize activating, air inlet and exhaust cam phaser 24 and 26 need threshold value oil flow and pressure usually.When engine speed is low, when for example oily 30 viscosity are high during idling or between internal-combustion engine 10 warming up periods, can't obtain this oil flow and pressure usually.During the engine low rotation speed and between internal-combustion engine 10 warming up periods, by adopting engine-driven oil hydraulic pump 32 and auxiliary cam phaser hydraulic circuit 62 simultaneously, the ability that activates exhaust and intake cam phase discriminator 24 and 26 is kept.By operating auxiliary oil hydraulic pump 64 and engine-driven oil hydraulic pump 32, the phase place of air inlet and exhaust cam shaft 18 and 22 can be adjusted to internal-combustion engine 10 is moved under optimum condition.
Referring now to Fig. 2, and continue with reference to Fig. 1, Fig. 2 shows the illustrative methods 74 of operation of combustion engine 10.Preferably, thus ECU70 will be programmed in advance according to method 74 operating internal-combustion engines 10.This method 74 starts from step 76.In step 76, ECU sends instruction to auxiliary oil hydraulic pump 64, thereby this oil hydraulic pump is carried the oil 30 that is under the pressure to cam phaser service duct 56, thereby makes air inlet and exhaust cam phaser 24 and 26 to work.This method proceeds to step 78 then, and wherein ECU sends instruction to intake cam phase discriminator 24, makes internal-combustion engine 10 to move under one in LIVC and EIVC operator scheme, thereby internal-combustion engine 10 is under the state that is more conducive to start.
Although described enforcement best mode of the present invention, be familiar with those skilled in the relevant art of the present invention and will recognize, in the scope of appended claims, for realizing that the present invention can carry out various optional designs and mode of execution at this.
Claims (19)
1, a kind of auxiliary cam phaser hydraulic circuit of internal-combustion engine, wherein internal-combustion engine has engine-driven oil hydraulic pump and at least one and the cam phaser that cam phaser control valve fluid is communicated with, and this auxiliary cam phaser hydraulic circuit comprises:
The fluid source that holds fluid;
Auxiliary hydraulic pump, it is communicated with described fluid source fluid, and can operate with pressurize a described fluid and a described FLUID TRANSPORTATION that is under the pressure and give the cam phaser service duct; With
Wherein, described cam phaser service duct is communicated with cam phaser control valve fluid, and this cam phaser control valve can be operated to give described cam phaser described FLUID TRANSPORTATION selectively and changeably.
2, auxiliary cam phaser hydraulic circuit according to claim 1, wherein said auxiliary hydraulic pump is by motoring.
3, auxiliary cam phaser hydraulic circuit according to claim 2 also comprises electronic control unit, is used to control described motor.
4, auxiliary cam phaser hydraulic circuit according to claim 1 also comprises electronic control unit, is used to control the cam phaser control valve.
5, auxiliary cam phaser hydraulic circuit according to claim 4, wherein said electronic control unit is programmed in advance to send instruction to the cam phaser control valve, thereby make at least one cam phaser can carry out intake valve pass in evening and an intake valve operation in the Central Shanxi Plain early, thereby reduce the effective compression ratio during the engine starting.
6, auxiliary cam phaser hydraulic circuit according to claim 1 also comprises:
Main lubrication channel is used to receive the described fluid from engine-driven oil hydraulic pump;
Wherein said main lubrication channel and described cam phaser service duct fluid selectively are communicated with; With
One-way valve, it is constructed to selectively the described FLUID TRANSPORTATION from described main lubrication channel be arrived described cam phaser service duct, and stops the described FLUID TRANSPORTATION from described cam phaser service duct to arrive described main lubrication channel substantially.
7, auxiliary cam phaser hydraulic circuit according to claim 1 also comprises:
Main lubrication channel is used to receive the described fluid from engine-driven oil hydraulic pump;
Wherein said main lubrication channel is communicated with described cam phaser service duct fluid; With
Wherein, described service pump is constructed to by described cam phaser service duct the described fluid that is under the pressure be offered described main lubrication channel.
8, the method for a kind of starting and operating internal-combustion engines, this internal-combustion engine has cam phaser and engine-driven oil hydraulic pump of at least one hydraulic actuating, and this method comprises:
When engine stops, provide pressure fluid to the cam phaser of this at least one hydraulic actuating;
The cam phaser of described at least one hydraulic actuating of control with the order internal-combustion engine intake valve open evening with one of intake valve open shop early pattern in move; And
Start described internal-combustion engine.
9, method according to claim 8 also comprises:
When motor during turning round between idle engine rotating speed and the threshold engine rotating speed, continuing provides pressure fluid to the cam phaser of this at least one hydraulic actuating.
10, method according to claim 8, wherein, auxiliary oil hydraulic pump provides pressure fluid to the cam phaser of this at least one hydraulic actuating.
11, method according to claim 9, wherein said threshold engine rotating speed is meant such engine speed, and engine-driven oil hydraulic pump can not provide required fluid flow and pressure to activate the cam phaser of this at least one hydraulic actuating when being lower than this engine speed.
12, method according to claim 9 also comprises:
When motor being higher than described threshold value rotating speed run duration, the pressure fluid from engine-driven oil hydraulic pump is flowed to the cam phaser of this at least one hydraulic actuating.
13, a kind of internal-combustion engine comprises:
Engine-driven oil hydraulic pump;
At least one cam phaser, it is communicated with cam phaser control valve fluid;
The fluid source that holds fluid;
Auxiliary hydraulic pump, it is communicated with described fluid source fluid, and the described fluid that can pressurize is also given the cam phaser service duct a described FLUID TRANSPORTATION that is under the pressure; With
Wherein, described cam phaser service duct is communicated with cam phaser control valve fluid, and this cam phaser control valve can be operated to give described cam phaser described FLUID TRANSPORTATION selectively and changeably.
14, internal-combustion engine according to claim 13, wherein said auxiliary hydraulic pump is by motoring.
15, internal-combustion engine according to claim 14 also comprises electronic control unit, is used to control described motor.
16, internal-combustion engine according to claim 13 also comprises electronic control unit, is used to control the cam phaser control valve.
17, internal-combustion engine according to claim 16, wherein said electronic control unit is programmed in advance to send instruction to the cam phaser control valve, thereby make at least one cam phaser can carry out intake valve pass in evening and an intake valve operation in the Central Shanxi Plain early, thereby reduce the effective compression ratio during the engine starting.
18, internal-combustion engine according to claim 13 also comprises:
Main lubrication channel is used to receive the described fluid from engine-driven oil hydraulic pump;
Wherein said main lubrication channel and described cam phaser service duct fluid selectively are communicated with;
One-way valve, it is constructed to selectively the described FLUID TRANSPORTATION from described main lubrication channel be arrived described cam phaser service duct, and basic the prevention arrives described main lubrication channel to the described FLUID TRANSPORTATION from described cam phaser service duct.
19, internal-combustion engine according to claim 13 also comprises:
Main lubrication channel is used to receive the described fluid from engine-driven oil hydraulic pump;
Wherein said main lubrication channel is communicated with described cam phaser service duct fluid; With
Wherein, described service pump is constructed to by described cam phaser service duct the described fluid that is under the pressure be offered described main lubrication channel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/386,300 US20070221149A1 (en) | 2006-03-22 | 2006-03-22 | Auxiliary cam phaser hydraulic circuit and method of operation |
| US11/386300 | 2006-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101059090A true CN101059090A (en) | 2007-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101097108A Pending CN101059090A (en) | 2006-03-22 | 2007-03-22 | Auxiliary cam phaser hydraulic circuit and method of operation |
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| Country | Link |
|---|---|
| US (1) | US20070221149A1 (en) |
| CN (1) | CN101059090A (en) |
| DE (1) | DE102007013021A1 (en) |
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| US9115610B2 (en) | 2013-03-11 | 2015-08-25 | Husco Automotive Holdings Llc | System for varying cylinder valve timing in an internal combustion engine |
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| US9582008B2 (en) | 2013-03-14 | 2017-02-28 | Husco Automotive Holdings Llc | Systems and methods for fluid pump outlet pressure regulation |
| DE102017107703A1 (en) * | 2017-04-10 | 2018-10-11 | Avl List Gmbh | Device for adjusting the effective length of a connecting rod as a function of the supply pressure |
| CN114440284A (en) * | 2022-03-21 | 2022-05-06 | 杭州老板电器股份有限公司 | Central range hood system and control method and control device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5588404A (en) * | 1994-12-12 | 1996-12-31 | General Motors Corporation | Variable cam phaser and method of assembly |
| DE19604865B4 (en) * | 1996-02-10 | 2009-05-07 | Schaeffler Kg | Actuating cylinder of a camshaft adjuster which can be acted upon by a separate oil delivery device |
| DE10050225A1 (en) * | 2000-10-11 | 2002-04-25 | Hydraulik Ring Gmbh | Actuating device for fixing a camshaft of a drive engine of a vehicle, preferably a motor vehicle, in a starting position |
| US6871620B2 (en) * | 2002-04-09 | 2005-03-29 | Ford Global Technologies, Llc | Variable cam timing unit oil supply arrangement |
| US6843214B1 (en) * | 2003-11-04 | 2005-01-18 | General Motors Corporation | Method for balancing engine cylinder bank output using crankshaft sensing and intake cam phasing |
-
2006
- 2006-03-22 US US11/386,300 patent/US20070221149A1/en not_active Abandoned
-
2007
- 2007-03-19 DE DE102007013021A patent/DE102007013021A1/en not_active Withdrawn
- 2007-03-22 CN CNA2007101097108A patent/CN101059090A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101627186B (en) * | 2006-12-13 | 2012-07-04 | 谢夫勒两合公司 | Device for the hydraulic control of gas exchange valves of a reciprocating internal combustion engine |
| CN101526017B (en) * | 2008-03-04 | 2012-07-11 | 通用汽车环球科技运作公司 | A camshaft phasor control system for an engine |
| CN103038462A (en) * | 2010-07-30 | 2013-04-10 | 丰田自动车株式会社 | Valve timing control apparatus for internal combustion engine and control method thereof |
| CN103038462B (en) * | 2010-07-30 | 2015-04-01 | 丰田自动车株式会社 | Valve timing control apparatus for internal combustion engine and control method thereof |
| CN104100327A (en) * | 2013-04-04 | 2014-10-15 | 电动内燃机公司 | Pre-lubrication and rewetting system for a machine |
| CN104100327B (en) * | 2013-04-04 | 2018-07-27 | 电动内燃机公司 | Pre-lubrication and rewetting system for a machine |
| CN104279015A (en) * | 2013-07-10 | 2015-01-14 | 福特环球技术公司 | Method and system for an engine for detection and mitigation of insufficient torque |
| CN104279015B (en) * | 2013-07-10 | 2018-12-07 | 福特环球技术公司 | For detecting and alleviating the method and system of the insufficient engine of torque |
Also Published As
| Publication number | Publication date |
|---|---|
| US20070221149A1 (en) | 2007-09-27 |
| DE102007013021A1 (en) | 2007-10-04 |
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Application publication date: 20071024 |