CN113357358A - Hydraulic control system of new energy automobile multi-gear transmission - Google Patents
Hydraulic control system of new energy automobile multi-gear transmission Download PDFInfo
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- CN113357358A CN113357358A CN202110766638.6A CN202110766638A CN113357358A CN 113357358 A CN113357358 A CN 113357358A CN 202110766638 A CN202110766638 A CN 202110766638A CN 113357358 A CN113357358 A CN 113357358A
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D48/0206—Control by fluid pressure in a system with a plurality of fluid-actuated clutches
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
- F16H57/0404—Lubricant filters
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0476—Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
- F16H61/0265—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
- F16H61/0276—Elements specially adapted for hydraulic control units, e.g. valves
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0203—Control by fluid pressure with an accumulator; Details thereof
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0221—Valves for clutch control systems; Details thereof
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H2061/0034—Accumulators for fluid pressure supply; Control thereof
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H2061/0037—Generation or control of line pressure characterised by controlled fluid supply to lubrication circuits of the gearing
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
- F16H61/0276—Elements specially adapted for hydraulic control units, e.g. valves
- F16H2061/0279—Details of hydraulic valves, e.g. lands, ports, spools or springs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Transmission Device (AREA)
Abstract
A hydraulic control system of a new energy automobile multi-gear transmission is used for solving the problems that a hydraulic control system of an existing new energy automobile multi-gear transmission is slow in gear shifting response, low in control precision, low in efficiency and reliability of the hydraulic system, large in impact and insufficient in cooling flow when gear shifting power is interrupted, and a cooler and a filter press are damaged. The electronic oil pump is connected with the hydraulic system through a reversing valve controlled by an electromagnetic valve, the reversing valve is respectively connected with a cooler and an energy accumulator, and the cooler is provided with a temperature control valve and is respectively connected with a pressure filter and a single-phase bypass valve; a suction filter of the gear shifting control system is connected with an electronic oil pump, the electronic oil pump is connected with a one-way valve, a first pressure sensor is arranged behind the one-way valve, the electronic oil pump is connected with an energy accumulator and is respectively connected with a first proportional pressure electromagnetic valve and a second proportional pressure electromagnetic valve, the first proportional pressure electromagnetic valve and the second proportional pressure electromagnetic valve are respectively connected with a first buffer valve and a second buffer valve, and a second pressure sensor and a third pressure sensor are respectively arranged behind the first buffer valve and the second buffer valve.
Description
Technical Field
The invention relates to the technical field of new energy automobile multi-gear transmissions, in particular to a hydraulic control system of a new energy automobile multi-gear transmission.
Background
At present, new energy automobile derailleur trade development is not too ripe, new energy automobile derailleur is mostly single speed reducer usually, and new energy automobile keeps off the derailleur more less, and two keep off as leading to, the volume production is the speed reducer of synchronous ware formula two fender basically, it uses hydraulic pressure shift system to have two fender or more to keep off the speed reducer seldom, even the hydraulic pressure shift system who is applied to the multi-gear derailleur at present all is very rough structure, the cooling lubrication system who should be used for new energy automobile derailleur in the trade simultaneously does not have the cleanliness mistake proofing function a lot.
Specifically, the prior art of the new energy automobile transmission is mostly a single-gear speed reducer, and a gear shifting system and a forced cooling and lubricating system are not used; the new energy automobile multi-gear transmission is rarely applied, two gears are mainly used, the two-gear or multi-gear speed reducer rarely uses a hydraulic system to control the speed changer to shift gears, but uses a motor executing mechanism to control the shifting of a shifting fork and a synchronizer in the speed reducer, and the whole gear shifting has the problems of power interruption, serious impact and the like due to mechanical hard connection or drive control; even if a hydraulic gear shifting system applied to a multi-gear speed reducer is of a very rough structure, a cooling and lubricating system is basically lubricated by oil throwing or oil pouring of an oil guide groove, and the cooling and lubricating efficiency is poor.
Therefore, how to provide a hydraulic control system of a multi-gear transmission of a new energy automobile, which has the advantages of fast gear shifting, high control precision, small leakage of a hydraulic system, high efficiency, high reliability, small gear shifting impact, uninterrupted power, large cooling flow and capability of preventing a cooler and a filter press from being damaged, is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a hydraulic control system of a multi-gear transmission of a new energy automobile, which is used for solving the technical problems of slow gear shifting response, low control precision, large leakage (low efficiency) of a hydraulic system, low reliability, gear shifting power interruption, large gear shifting impact, insufficient cooling flow and damage of a cooler and a filter press of the existing hydraulic control system of the multi-gear transmission of the new energy automobile.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hydraulic control system of a multi-gear transmission of a new energy automobile comprises: the cooling and lubricating control system comprises an oil pan, wherein a first suction filter is arranged on the oil pan and connected with a first electronic oil pump, the first electronic oil pump is connected with a hydraulic system through a solenoid valve controlled reversing valve, the reversing valve is respectively connected with a cooler and an energy accumulator, the cooler is provided with a temperature control valve and is respectively connected with a pressure filter and a single-phase bypass valve, and the pressure filter and the single-phase bypass valve are jointly connected with a motor, a first clutch and a second clutch;
the gear shifting control system comprises an oil pan, a second suction filter is arranged on the oil pan, the second suction filter is connected with a second electronic oil pump, the second electronic oil pump is connected with a first one-way valve, a first pressure sensor is arranged behind the first one-way valve, the first one-way valve is connected with the energy accumulator and is respectively connected with a first proportional pressure solenoid valve and a second proportional pressure solenoid valve, the first proportional pressure solenoid valve is connected with a first buffer valve and is provided with a second pressure sensor behind the first buffer valve, the second proportional pressure solenoid valve is provided with a second one-way valve and is connected with a second buffer valve, a third pressure sensor is arranged behind the second buffer valve, the first buffer valve is connected with a second clutch, the second buffer valve is connected with the first clutch, and a main regulating valve is arranged behind the second electronic oil pump and the first one-way valve, and the second pressure sensor and the third pressure sensor are used for testing the oil chamber pressure of the first clutch and the oil chamber pressure of the second clutch respectively.
The first suction filter, the second suction filter and the pressure filter are used for controlling the oil cleanliness of a hydraulic system in the gear shifting system and ensuring that the hydraulic oil supplied to a hydraulic system of the transmission can reach the required cleanliness.
The first electronic oil pump and the second electronic oil pump are used for providing pressure or flow of a hydraulic system in a control system and ensuring that the pressure of a hydraulic system of the transmission can reach a required range or a flow range.
The reversing valve is used for controlling the oil pressure of a hydraulic system in the gear shifting system to avoid supplementing pressure or flow to the gear shifting system when the oil pressure is too low or the oil pressure is just started.
The cooler is used for controlling the system temperature of the transmission and the motor, and plays a role in cooling; meanwhile, the temperature control valve is used for improving the low-temperature efficiency of the system.
The first one-way valve is used for controlling the backflow of hydraulic oil of a hydraulic system in the gear shifting system, ensuring the responsiveness of a hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact; the second one-way valve is used for controlling oil backflow of a clutch oil channel in the gear shifting system, and the gear shifting responsiveness of the clutch is improved; meanwhile, the single-phase bypass valve is used for preventing valve error, and when the pressure difference between the cooler inlet pressure and the filter press outlet is too large, the single-phase bypass valve is opened, so that the damage degree of the cooler and the filter press can be effectively protected.
The main pressure regulating valve is used for controlling the pressure of a hydraulic system in a gear shifting system, ensuring the pressure of a hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact;
the accumulator is used for controlling the pressure and flow of a hydraulic system in the gear shifting system, ensuring the responsiveness of the hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact;
the first cushion valve and the second cushion valve are used for compensating pressure and flow of a hydraulic system in a gear shifting system, ensuring the responsiveness of a hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact.
The first pressure sensor, the second pressure sensor and the third pressure sensor are used for monitoring the pressure of a hydraulic system in a gear shifting system, and ensuring the pressure state of a hydraulic system of a transmission and the pressure of the first clutch and the second clutch.
The first proportional pressure solenoid valve and the second proportional pressure solenoid valve are used for controlling the pressure of the first clutch and the second clutch of a hydraulic system in a gear shifting system, so that the clutch pressure of the hydraulic system of the transmission is moderate, and the abrasion of the first clutch and the second clutch is avoided.
The first clutch and the second clutch are used as executive elements in a control gear shifting system, the first clutch is a clutch closed when the first gear of the transmission is in the first gear, and the second clutch is a clutch closed when the second gear of the transmission is in the second gear.
Compared with the prior art, the hydraulic control system of the multi-gear transmission of the new energy automobile has the following advantages:
in the hydraulic control system of the new energy automobile multi-gear transmission, hydraulic oil is pressed into the lubrication control system through a first suction filter by a first electronic oil pump of the hydraulic cooling lubrication control system, and cooling lubricating oil enters a cooler through a reversing valve to be cooled and filtered by a filter press and then is distributed to a first clutch, a second clutch and a motor to cool related parts; a second electronic oil pump of the hydraulic gear shifting control system presses hydraulic oil into the hydraulic gear shifting system through a second suction filter, and certain system pressure is formed through pressure control of a main pressure regulating valve; and the automatic gearbox control unit controls whether the first and second proportional pressure electromagnetic valves work or not through a gear shifting control strategy, so that the switching, combination and separation states of the first and second clutches are realized, gear shifting or gear-in control is completed, and meanwhile, when the system is started for the first time, in order to improve the system responsiveness, a first electronic oil pump in the hydraulic cooling and lubricating control system presses hydraulic oil into the lubricating control system through a first suction filter, and necessary pressure or flow can be directly provided for the gear shifting control system through a reversing valve.
Drawings
FIG. 1 is a schematic structural diagram of a hydraulic control system of a multi-gear transmission of a new energy automobile, provided by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a hydraulic control system of a multi-gear transmission of a new energy automobile in an initial starting state according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a hydraulic control system of a multi-gear transmission of a new energy automobile in a neutral gear or P gear state, wherein the hydraulic control system is provided by the embodiment of the invention;
FIG. 4 is a schematic structural diagram of a hydraulic control system of a multi-gear transmission of a new energy automobile in a first gear state, according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of a hydraulic control system of a multi-speed transmission of a new energy vehicle in a second-gear state according to an embodiment of the present invention.
Reference numerals:
1-an oil pan; 2-a first suction filter; 3-a first electronic oil pump; 4-an electromagnetic valve; 5-a reversing valve; 6-a cooler; 7-an accumulator; 8-a temperature control valve; 9-pressure filter; 10-a single-phase bypass valve; 11-a motor; 12-a first clutch; 13-a second clutch; 15-a second suction filter; 16-a second electronic oil pump; 17-a first one-way valve; 18-a first pressure sensor; 19-a first proportional pressure solenoid valve; 20-a second proportional pressure solenoid valve; 21-a first trim valve; 22-a second pressure sensor; 23-a second one-way valve; 24-a second trim valve; 25-a third pressure sensor; 26-a main regulating valve;
a-a cooling and lubricating control system; b-a gear shift control system.
Detailed Description
For convenience of understanding, the hydraulic control system of the multi-gear transmission of the new energy automobile provided by the embodiment of the invention is described in detail below with reference to the attached drawings of the specification.
An embodiment of the present invention provides a hydraulic control system for a multi-speed transmission of a new energy vehicle, as shown in fig. 1 and 2, including:
the cooling and lubricating control system A comprises an oil pan 1, a first suction filter 2 is arranged on the oil pan 1, the first suction filter 2 is connected with a first electronic oil pump 3, the first electronic oil pump 3 controls a reversing valve 5 to be connected with a hydraulic system through an electromagnetic valve 4, the reversing valve 5 is respectively connected with a cooler 6 and an energy accumulator 7, the cooler 6 is provided with a temperature control valve 8 and is respectively connected with a pressure filter 9 and a single-phase bypass valve 10, and the pressure filter 9 and the single-phase bypass valve 10 are jointly connected with a motor 11, a first clutch 12 and a second clutch 13;
the gear-shifting control system B comprises an oil pan 1, wherein a second suction filter 15 is arranged on the oil pan 1, a second electronic oil pump 16 is connected with the second suction filter 15, a first one-way valve 17 is connected with the second electronic oil pump 16, a first pressure sensor 18 is arranged behind the first one-way valve 17, the first one-way valve 17 is connected with an energy accumulator 7 and is respectively connected with a first proportional pressure electromagnetic valve 19 and a second proportional pressure electromagnetic valve 20, the first proportional pressure electromagnetic valve 19 is connected with a first buffer valve 21, a second pressure sensor 22 is arranged behind the first buffer valve 21, the second proportional pressure electromagnetic valve 20 is provided with a second one-way valve 23, the second buffer valve 24 is connected with a third pressure sensor 25, a second clutch 13 is connected with the first buffer valve 21, the second buffer valve 24 is connected with the first clutch 12, a main regulating valve 26 is arranged behind the second electronic oil pump 16 and the first one-way valve 17, and the second pressure sensor 22 and the third pressure sensor 25 are used to test the oil chamber pressures of the first clutch 12 and the second clutch 13, respectively.
Compared with the prior art, the hydraulic control system of the multi-gear transmission of the new energy automobile has the following advantages:
in the hydraulic control system of the multi-gear transmission of the new energy automobile, provided by the embodiment of the invention, as the first electronic oil pump 3 of the hydraulic cooling and lubricating control system presses hydraulic oil into the lubricating control system through the first suction filter 2, and the cooling lubricating oil enters the cooler 6 through the reversing valve 5 to be cooled and filtered by the filter press 9, and then is distributed to the first clutch (12) and the second clutch (13) and the motor 11 to cool related parts; a second electronic oil pump 16 of the hydraulic gear shifting control system presses hydraulic oil into the hydraulic gear shifting system through a second suction filter 15, and the hydraulic oil is controlled by the pressure of a main pressure regulating valve 26 to form certain system pressure, an energy accumulator 7 in the hydraulic system stores a certain volume of hydraulic oil, and the system pressure or flow is compensated when the pressure or flow in the hydraulic system is abnormally suddenly increased or suddenly decreased; moreover, the automatic gearbox control unit controls whether the first and second proportional pressure solenoid valves (19, 20) work or not through a gear-shifting control strategy, realizes the switching, combination and separation states of the first and second clutches (12, 13), completes gear shifting or gear-shifting control, and simultaneously when the system is started for the first time (as shown in figure 2), in order to improve the system responsiveness, the first electronic oil pump 3 in the hydraulic cooling lubrication control system presses hydraulic oil into the lubrication control system through the first suction filter 2, and necessary pressure or flow can be directly provided for the gear-shifting control system through the reversing valve 5, so the hydraulic control system of the new energy automobile multi-gear transmission provided by the embodiment of the invention has the advantages of quick gear-shifting response, high control precision, small hydraulic system leakage, high efficiency, high reliability, small gear-shifting impact, uninterrupted power and large cooling flow, and can effectively prevent the damage of the cooler and the filter press.
The first suction filter 2, the second suction filter 15 and the pressure filter 9 can be used for controlling the oil cleanliness of a hydraulic system in a gear shifting system and ensuring that the hydraulic oil supplied to a hydraulic system of the transmission can reach the required cleanliness, so that the abnormal problems of clamping stagnation, abnormal abrasion and the like of other hydraulic parts in the hydraulic system are effectively prevented; and, filter-press 9 arranges in 6 rear ends of cooler, can effective filtration cooler pollutants, avoids jamming problems such as solenoid valve 4, the whole case reliability of promotion that can be very big.
The first electronic oil pump 3 and the second electronic oil pump 16 can be used for providing pressure or flow of a hydraulic system in a control system, and pressure of a hydraulic system of a transmission can be ensured to reach a required range or a flow range.
The reversing valve 5 can be used for controlling the oil pressure of a hydraulic system in the gear shifting system to avoid supplementing pressure or flow to the gear shifting system when the oil pressure is too low or the oil pressure is just started, so that the responsiveness when the gear shifting system is started for the first time is effectively improved.
The cooler 6 can be used for controlling the system temperature of the transmission and the motor 11, and plays a role in cooling; meanwhile, the temperature control valve 8 can be used for improving the low-temperature efficiency of the system, so that the problems of slow oil temperature rise and the like can be effectively avoided by switching the hydraulic oil circuit when the vehicle is started for the first time, and the whole box efficiency or performance can be greatly improved.
Specifically, the single-phase bypass valve 10 is arranged at the inlet of the cooler 6 and the outlet of the filter press 9, so that the pressure drop condition of the cooling module can be measured and controlled in real time, the situation that the whole box has no cooling and lubricating flow due to the blockage of the cooling module is avoided, and the reliability of the whole box is effectively improved.
The first check valve 17 can be used for controlling the backflow of hydraulic oil of a hydraulic system in the gear shifting system, ensuring the responsiveness of the hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact; the second one-way valve 23 can be used for controlling oil backflow of a clutch oil channel in a gear shifting system, so that the gear shifting responsiveness of the clutch is improved; meanwhile, the single-phase bypass valve 10 can be used for preventing valve error, and when the pressure difference between the inlet of the cooler 6 and the outlet of the filter press 9 is too large, the single-phase bypass valve 10 is opened, so that the damage degree of the cooler 6 and the filter press 9 can be effectively protected.
The main pressure regulating valve 20 can be used for controlling the pressure of a hydraulic system in a gear shifting system, ensuring the pressure of a hydraulic system of a transmission and protecting hydraulic parts from faults caused by impact; the accumulator 7 can be used for controlling the pressure and flow of a hydraulic system in a gear shifting system, ensuring the responsiveness of a hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact; the first trim valve 21 and the second trim valve 24 can be used to compensate for the pressure and flow of the hydraulic system in the gear shift system, ensure the responsiveness of the transmission hydraulic system, and protect the hydraulic components from their failure due to shock.
The first pressure sensor 18, the second pressure sensor 22 and the third pressure sensor 25 can be used for monitoring the pressure of a hydraulic system in a gear shifting system, and ensuring the pressure state of a hydraulic system of the transmission and the pressure of the first clutch 12 and the second clutch 13.
The first proportional pressure solenoid valve 19 and the second proportional pressure solenoid valve 20 can be used for controlling the pressure of the first clutch 12 and the second clutch 13 of the hydraulic system in the gear shifting system, so that the clutch pressure of the hydraulic system of the transmission is moderate, and the abrasion of the first clutch 12 and the second clutch 13 is avoided.
The first clutch 12 and the second clutch 13 can be used as actuators in a control shift system, the first clutch 12 is a clutch that is engaged when the first gear of the transmission is in gear, and the second clutch 13 is a clutch that is engaged when the second gear of the transmission is in gear.
The working process of the hydraulic control system of the new energy automobile multi-gear transmission provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings:
the neutral gear or the P gear is controlled in an oil-blocking path:
as shown in fig. 3, the second electronic oil pump 16 presses the hydraulic oil into the hydraulic shifting system through the second suction filter 15, and a certain system pressure is formed through pressure control of the main pressure regulating valve 26, the accumulator 7 in the hydraulic system stores a certain volume of hydraulic oil, so as to compensate the system pressure or flow when the pressure or flow in the hydraulic system abnormally suddenly increases or suddenly decreases; the automatic gearbox control unit controls the first and second proportional pressure electromagnetic valves (19, 20) to keep an inoperative state through a gear shifting control strategy, and realizes the oil cut supply and separation of the first and second clutches (12, 13);
and (II) controlling the first gear in an oil blocking path:
as shown in fig. 4, the second electronic oil pump 16 presses the hydraulic oil into the hydraulic shifting system through the second suction filter 15, and a certain system pressure is formed through pressure control of the main pressure regulating valve 26, the accumulator 7 in the hydraulic system stores a certain volume of hydraulic oil, so as to compensate the system pressure or flow when the pressure or flow in the hydraulic system abnormally suddenly increases or suddenly decreases; the automatic gearbox control unit controls the first proportional pressure solenoid valve 19 to keep an operating state through a gear shifting control strategy, and controls the second proportional pressure solenoid valve 20 to keep an inactive state at the same time, so that an oil supply combination state of the second clutch 13 and an oil cut-off separation state of the first clutch 12 are realized;
(III) controlling the second gear in an oil blocking path:
as shown in fig. 5, the second electronic oil pump 16 presses the hydraulic oil into the hydraulic shift system through the first suction filter 15, and the required system pressure is formed through the pressure control of the main pressure regulating valve 26, the accumulator 7 in the hydraulic system stores a certain volume of hydraulic oil, so as to compensate the system pressure or flow when the pressure or flow in the hydraulic system abnormally suddenly increases or suddenly decreases; the automatic gearbox control unit controls the first proportional pressure solenoid valve 19 to keep an inactive state and controls the second proportional pressure solenoid valve 20 to keep an active state through a gear shifting control strategy, so that the oil cut-off separation state of the second clutch 13 and the oil supply combination state of the first clutch 12 are realized.
When the automatic Transmission Control Unit (TCU) controls the first clutch 12 and the second clutch 13 to switch gear shifting through a gear shifting control strategy, the TCU controls the working modes of the first proportional pressure electromagnetic valve 19 and the second proportional pressure electromagnetic valve 20 to quickly unload oil in the oil cavity of the second clutch 13 and quickly charge oil in the oil cavity of the first clutch 12, so that the quick separation of the second clutch 13 and the combination of the first clutch 12 are realized, gear shifting or on-gear control is completed, and due to the action of the energy accumulator 7 and the reversing valve 5, the oil charge response of the first clutch 12 is extremely quick, so that the gear shifting responsiveness of the whole box and the whole vehicle is improved.
In summary, the hydraulic control system of the multi-gear transmission of the new energy automobile provided by the embodiment of the invention mainly has the following advantages:
the gear shift response is quick, and the pressure impact is small:
the energy accumulator 7 can provide hydraulic oil for the system and recover the hydraulic oil in a proper amount at the right time when the pressure and the flow of the hydraulic system are controlled, so that the responsiveness of the system is improved, and the pressure fluctuation of the system is effectively reduced;
(II) high control precision:
the energy accumulator 7 and the first and second proportional pressure electromagnetic valves (19 and 20) can provide hydraulic oil and recover hydraulic oil for the system in a proper amount at the right time when the pressure and the flow of the hydraulic system are controlled, so that the system pressure fluctuation is reduced, and the pressure control precision of the clutch during reunion and separation is effectively improved;
(III) small leakage and high efficiency:
the first and second proportional pressure solenoid valves (19, 20) are proportional solenoid valves with small leakage, and the working modes of the solenoid valves are defined by control logic and hardware design, so that the high-efficiency performance is achieved;
(IV) the reliability is high:
the energy accumulator 7 and the first one-way valve 17 are of a structure capable of effectively reducing system pressure impact, so that the reliability of the system is greatly improved, and the probability of damage to hydraulic parts such as an electronic oil pump is avoided;
(V), hydraulic parts such as electronic oil pump are easy to select:
the energy accumulator 7 can timely provide proper hydraulic oil for the system and recover the hydraulic oil, so that the requirements of a hydraulic gear shifting system of the multi-gear transmission of the new energy automobile on pressure and flow are effectively reduced to a certain degree, and the type selection of hydraulic parts such as an electronic oil pump is facilitated;
and (VI) the hydraulic system is simple:
the first and second proportional pressure solenoid valves (19, 20) belong to direct-drive pressure control solenoid valves, and have the advantages of simple hydraulic system, fast response and small hysteresis;
the hydraulic gear shifting system has the advantages of uninterrupted gear shifting power and small gear shifting impact:
the first clutch (12) and the second clutch (13) are wet multi-plate clutches as actuating mechanisms, and by adopting the hydraulic gear shifting system of the new energy automobile multi-gear transmission provided by the embodiment of the invention, gear shifting power can be uninterrupted by controlling the clutches to shift gears, and gear shifting impact is small.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a hydraulic control system of new energy automobile multi-gear transmission which characterized in that includes:
the cooling and lubricating control system comprises an oil pan, wherein a first suction filter is arranged on the oil pan and connected with a first electronic oil pump, the first electronic oil pump is connected with a hydraulic system through a solenoid valve controlled reversing valve, the reversing valve is respectively connected with a cooler and an energy accumulator, the cooler is provided with a temperature control valve and is respectively connected with a pressure filter and a single-phase bypass valve, and the pressure filter and the single-phase bypass valve are jointly connected with a motor, a first clutch and a second clutch;
the gear shifting control system comprises an oil pan, a second suction filter is arranged on the oil pan, the second suction filter is connected with a second electronic oil pump, the second electronic oil pump is connected with a first one-way valve, a first pressure sensor is arranged behind the first one-way valve, the first one-way valve is connected with the energy accumulator and is respectively connected with a first proportional pressure solenoid valve and a second proportional pressure solenoid valve, the first proportional pressure solenoid valve is connected with a first buffer valve and is provided with a second pressure sensor behind the first buffer valve, the second proportional pressure solenoid valve is provided with a second one-way valve and is connected with a second buffer valve, a third pressure sensor is arranged behind the second buffer valve, the first buffer valve is connected with a second clutch, the second buffer valve is connected with the first clutch, and a main regulating valve is arranged behind the second electronic oil pump and the first one-way valve, and the second pressure sensor and the third pressure sensor are used for testing the oil chamber pressure of the first clutch and the oil chamber pressure of the second clutch respectively.
2. The hydraulic control system of the new energy automobile multi-gear transmission is characterized in that the first suction filter, the second suction filter and the pressure filter are used for controlling oil cleanliness of a hydraulic system in a gear shifting system, and hydraulic oil supplied to the hydraulic system of the transmission can be guaranteed to reach required cleanliness.
3. The hydraulic control system of the new energy automobile multi-gear transmission is characterized in that the first electronic oil pump and the second electronic oil pump are used for providing pressure or flow of a hydraulic system in a control system and ensuring that the pressure of the hydraulic system of the transmission can reach a required range or a flow range.
4. The hydraulic control system of the new energy automobile multi-gear transmission is characterized in that the reversing valve is used for controlling the oil pressure of the hydraulic system in the gear shifting system to avoid supplementing pressure or flow for the gear shifting system when the oil pressure is too low or the oil pressure is just started.
5. The hydraulic control system of the new energy automobile multi-gear transmission is characterized in that the cooler is used for controlling the system temperature of the transmission and the motor and has the cooling function; meanwhile, the temperature control valve is used for improving the low-temperature efficiency of the system.
6. The hydraulic control system of the new energy automobile multi-gear transmission is characterized in that the first one-way valve is used for controlling the backflow of hydraulic oil of a hydraulic system in a gear shifting system, ensuring the responsiveness of the hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact; the second one-way valve is used for controlling oil backflow of a clutch oil channel in the gear shifting system, and the gear shifting responsiveness of the clutch is improved; meanwhile, the single-phase bypass valve is used for preventing valve error, and when the pressure difference between the cooler inlet pressure and the filter press outlet is too large, the single-phase bypass valve is opened, so that the damage degree of the cooler and the filter press can be effectively protected.
7. The hydraulic control system of the new energy automobile multi-gear transmission is characterized in that the main pressure regulating valve is used for controlling the pressure of a hydraulic system in a gear shifting system, ensuring the pressure of the hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact;
the accumulator is used for controlling the pressure and flow of a hydraulic system in the gear shifting system, ensuring the responsiveness of the hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact;
the first cushion valve and the second cushion valve are used for compensating pressure and flow of a hydraulic system in a gear shifting system, ensuring the responsiveness of a hydraulic system of the transmission and protecting hydraulic parts from faults caused by impact.
8. The hydraulic control system of the new energy vehicle multi-speed transmission according to claim 1, wherein the first pressure sensor, the second pressure sensor and the third pressure sensor are used for monitoring the pressure of a hydraulic system in a gear shifting system, and ensuring the pressure state of the hydraulic system of the transmission and the pressure of the first clutch and the second clutch.
9. The hydraulic control system of the new energy vehicle multi-speed transmission according to claim 1, wherein the first proportional pressure solenoid valve and the second proportional pressure solenoid valve are used for controlling the pressure of the first clutch and the second clutch of a hydraulic system in a gear shifting system, so that the clutch pressure of the hydraulic system of the transmission is moderate, and the first clutch and the second clutch are prevented from being worn.
10. The hydraulic control system of the new energy vehicle multi-speed transmission according to claim 1, wherein the first clutch and the second clutch are used as actuators in a control shift system, the first clutch is a clutch that is closed when the first speed of the transmission is in the first speed, and the second clutch is a clutch that is closed when the second speed of the transmission is in the second speed.
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