CN202326847U - Proportional valve-controlled pump type intermediate shaft brake for automatic transmission - Google Patents
Proportional valve-controlled pump type intermediate shaft brake for automatic transmission Download PDFInfo
- Publication number
- CN202326847U CN202326847U CN2011204555519U CN201120455551U CN202326847U CN 202326847 U CN202326847 U CN 202326847U CN 2011204555519 U CN2011204555519 U CN 2011204555519U CN 201120455551 U CN201120455551 U CN 201120455551U CN 202326847 U CN202326847 U CN 202326847U
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- hydraulic pump
- transmission
- intermediate shaft
- automatic transmission
- pump
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Abstract
The utility model relate to a novel proportional valve-controlled pump type intermediate shaft brake for an automatic transmission. The brake consists of a hydraulic pump and a proportional overflow valve, can be arranged in an automatic transmission shell, and also can be arranged outside the automatic transmission shell. A transmission intermediate shaft is connected with the hydraulic pump. An outlet of the hydraulic pump is connected with the electrohydraulic proportional overflow valve which is connected with a transmission control unit (TCU). The TCU changes oil pressure at the outlet of the hydraulic pump by regulating the current of a coil of the electrohydraulic proportional overflow valve, so that the driving torque of the hydraulic pump, namely the braking torque of the transmission intermediate shaft is controlled.
Description
Technical field
The utility model relates to a kind of jack shaft braking device of automatic transmission, especially the intermediate shaft brake of middle shaft type electric-controlled mechanical automatic speed transmission (AMT).
Background technique
Electric control mechanical type automatic speed variator (AMT) is a body with traditional manual transmission, and its gear-shifting actuating mechanism then changes electronic control mode into by traditional manual control mode.Shaft type had a grade gear transmission in the middle of ripe manual transmission mostly adopted, and through changing the engagement of gear train, changed velocity ratio, reached the purpose of speed change.When automobile when low grade rises up into top grade, clutch is in separated state, gear train is in neutral state, this moment, jack shaft was appointed the high speed rotating state that is in because of the reason of inertia, its rotating speed is higher than the high-grade gear that will mesh, and rises up into top grade by force and can cause and beat the tooth phenomenon.In order to reduce shifting shock, to shorten shift time, automatic transmission is equipped with intermediate shaft brake, forces to reduce the jack shaft rotating speed, when jack shaft and high-grade gear rotational speed difference are little, rises up into top grade.At present; Known intermediate shaft brake adopts multi-disc wet clutch structure commonly used; Mainly form by piston, pressing plate, friction plate, solenoid valve, hydraulic power elements such as (or gas pressure sourcies); Wherein friction plate and jack shaft connect through spline, and with identical rotating speed rotation, and pressing plate can not be rotated by the brake casing restriction.When needs are braked jack shaft; Transmission control unit (TCU) sends signal and makes the electromagnetic valve coil energising; Piston axially moves under the effect of hydraulic pressure (or air pressure); Make pressing plate and friction plate combine closely, the frictional force between pressing plate and the friction plate makes the rotating speed of jack shaft sharply descend, and reaches the purpose of brake intermediate shaft.
Obviously, some deficiency below above-mentioned break exists: 1, friction plate long-term work, cause that easily temperature sharply raises, thereby cause the variation of friction factor, influence braking effect, also be unfavorable for sequencing control; 2, friction plate easy abrasion needs periodic replacement, because speed changer in case of transmission, dismantled in the mounting point, maintenance cost is high; 3, complex structure, manufacturing and installation cost are higher.
Summary of the invention
Be unfavorable for sequencing control in order to solve existing intermediate shaft brake, safeguard, make the installation cost problem of higher; The present invention provides a kind of proportional valve control pump type automatic speed changer intermediate shaft brake; This break can not only be stablized the retarding torque that provides required exactly; And can reduce maintenance cost in order to avoid safeguard.
The technical solution adopted for the present invention to solve the technical problems is: this intermediate shaft brake comprises: transmission countershaft 13, oil hydraulic pump 14, electricity liquid ratio relief valve 16; Wherein, The output terminal of transmission countershaft 13 is installed an oil hydraulic pump 14; The oil hydraulic pump outlet connects an electricity liquid ratio relief valve 16, and transmission control unit TCU connects electricity liquid ratio relief valve.
Wherein, oil hydraulic pump is the normal hydraulic oil pump that a discharge capacity is 10～15ml, and its outlet oil pressure receives the adjusting of electricity liquid ratio relief valve; Electricity liquid ratio relief valve is that a range of regulation is the common proportional pressure control valve of 0～2MPa, is controlled by automatic transmission TCU, is used for the outlet oil pressure of regulator solution press pump.
Wherein, can adopt spline, flat key or flange various ways to connect between hydraulic-pressure pump 14 and the transmission countershaft 13
Drive the oil hydraulic pump rotation with jack shaft; This oil hydraulic pump is as the deceleration loading of jack shaft; The oil hydraulic pump outlet connects an electricity liquid ratio relief valve; Transmission control unit (TCU) sends the electric current of SC sigmal control proportional pressure control valve coil, with the outlet oil pressure of regulator solution press pump, thus the size and the effective acting time of control jack shaft retarding torque.When not needing brake intermediate shaft, the coil current that TCU sends the SC sigmal control proportional pressure control valve is zero, and the pressure of oil hydraulic pump outlet also is zero, and the jack shaft non-brake torque does not have energy loss certainly yet; When the needs brake intermediate shaft; The coil current that TCU sends the SC sigmal control proportional pressure control valve is certain certain value, and the pressure of oil hydraulic pump outlet also is corresponding definite value, and this moment, retarding torque also was a corresponding definite value; The jack shaft rotating speed descends at once, thereby reaches the purpose of braking.
The invention has the beneficial effects as follows: 1, can in the braking of automatic transmission jack shaft, take away the heat that produces because of energy loss, a stable and accurate retarding torque is provided through hydraulic oil; 2, have basically no wearing and tearing, long service life effectively reduces maintenance cost; 3, do not need power source, simple in structure.
Description of drawings
Fig. 1 proportional valve control pump type automatic speed changer intermediate shaft brake fundamental diagram.
Embodiment
As shown in the figure; Speed changer comprises: transmission input shaft 1, input shaft gear 2, one grade of gear 3, one, second gear combined cover 4, intermediate gear 5, three-range transmission 6, three, fourth gear combined cover 7, fourth gear 8, reverse gear 9, reverse gear combined cover 10, transmission output shaft 11, reverse idler gear 12, transmission countershaft 13, oil hydraulic pump 14, fuel tank 15, proportional pressure control valve 16, engine output shaft 17, clutch 18; When speed changer (is sake of clarity when low grade rises up into top grade; To rise up into second gear from one grade is example); At first, clutch 18 separates, and interrupts the power transmission between engine output shaft 17 and the transmission input shaft 1; Then, one, second gear combined cover 4 moves to right and no longer combine with one grade of gear 3, is in neutral gear position, interrupt the power transmission of transmission countershaft 13 and transmission output shaft 11.Next action, promptly be with one, second gear combined cover 4 moves to right again, and it is combined with intermediate gear 5, makes transmission countershaft 13 and transmission output shaft 11 pass through intermediate gear 5 transferring power.In this process because effect of inertia, transmission countershaft 13 after getting into the neutral operation, the rotating speed when still keeping a grade to combine, promptly intermediate gear 5 is also keeping corresponding rotating speed; Receive the influence of inertia equally, one, the corresponding rotating speed when the second gear combined cover is keeping a grade to combine.Obviously, because the difference of speed ratio between the gear mesh, the rotating speed of intermediate gear 5 will be higher than one, the rotating speed of second gear combined cover 4, in order not cause shifting shock, prolongs the working life of gear, expects both synchronization.For making both synchronization, need brake transmission countershaft 13, through calculating, this retarding torque is that 40～60N.m is more satisfactory.
The present invention utilizes a hydraulic-pressure pump 14, proportional pressure control valve 16 for transmission countershaft 13 retarding torque to be provided; Can adopt spline, flat key or flange various ways to connect between hydraulic-pressure pump 14 and the transmission countershaft 13; The rotor that jack shaft 13 drives hydraulic-pressure pump 14 rotates synchronously, pumps fluid.The oil outlet of hydraulic-pressure pump 14 connects an electricity liquid ratio relief valve, and the pressure that pumps fluid receives the linearly adjust of this valve coil electric current.Obviously, when oil hydraulic pump 14 outlet low fuel pressures, the driving torque that oil hydraulic pump 14 needs is little, and for transmission countershaft 13, suffered retarding torque is just little; When oil hydraulic pump 14 outlet oil pressure were high, the driving torque that oil hydraulic pump 14 needs was big, and for transmission countershaft 13, suffered retarding torque is just big.Therefore; In the time need not braking to jack shaft 13; Only need the outlet oil pressure of oil hydraulic pump 14 be reduced to zero through TCU control ratio relief valve 16, when needs brakes, can be according to brake request through getting final product outlet oil pressure and the action time thereof that TCU controls oil hydraulic pump 14.Through calculating, 40～60N.m is provided desirable retarding torque, the common proportional pressure control valve that the normal hydraulic oil pump that only to need a discharge capacity be 10～15ml and range of regulation are 0～2MPa gets final product; Simultaneously, the heat that braking process produces is taken away by hydraulic oil in real time, without any need for cooling unit.The present invention realizes easily, and is simple in structure, with low cost.
Claims (2)
1. proportional valve control pump type automatic speed changer intermediate shaft brake; Comprise: transmission countershaft (13), oil hydraulic pump (14), electricity liquid ratio relief valve (16); It is characterized in that; The output terminal of transmission countershaft 13 is installed an oil hydraulic pump (14), and the oil hydraulic pump outlet connects an electricity liquid ratio relief valve (16), and transmission control unit TCU connects electricity liquid ratio relief valve.
2. a kind of proportional valve control pump type automatic speed changer intermediate shaft brake according to claim 1 is characterized in that, can adopt spline, flat key or flange various ways to connect between hydraulic-pressure pump (14) and the transmission countershaft (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204555519U CN202326847U (en) | 2011-11-16 | 2011-11-16 | Proportional valve-controlled pump type intermediate shaft brake for automatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204555519U CN202326847U (en) | 2011-11-16 | 2011-11-16 | Proportional valve-controlled pump type intermediate shaft brake for automatic transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202326847U true CN202326847U (en) | 2012-07-11 |
Family
ID=46438827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204555519U Expired - Fee Related CN202326847U (en) | 2011-11-16 | 2011-11-16 | Proportional valve-controlled pump type intermediate shaft brake for automatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202326847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458759A (en) * | 2022-02-22 | 2022-05-10 | 一汽解放汽车有限公司 | Control method of AMT intermediate shaft brake based on oil pump |
-
2011
- 2011-11-16 CN CN2011204555519U patent/CN202326847U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458759A (en) * | 2022-02-22 | 2022-05-10 | 一汽解放汽车有限公司 | Control method of AMT intermediate shaft brake based on oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20151116 |
|
| EXPY | Termination of patent right or utility model |