CN202624354U - Hydraulic power steering system of hybrid vehicle - Google Patents
Hydraulic power steering system of hybrid vehicle Download PDFInfo
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- CN202624354U CN202624354U CN 201220250646 CN201220250646U CN202624354U CN 202624354 U CN202624354 U CN 202624354U CN 201220250646 CN201220250646 CN 201220250646 CN 201220250646 U CN201220250646 U CN 201220250646U CN 202624354 U CN202624354 U CN 202624354U
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Abstract
The utility model discloses a hydraulic power steering system of a hybrid vehicle, which is used for solving a problem that hydraulic power deficiency is caused in the hybrid vehicle power mode switching process in the prior art. The system comprises an energy storage mechanism and a sensor, wherein the sensor is used for collecting a steering angle signal of a steering wheel and determining whether a vehicle is in a steering state according to the steering angle signal; the energy storage mechanism is connected with a steering device and used for storing hydraulic oil when the hydraulic oil is output by a hydraulic pump; when the sensor determines that the vehicle is in the steering state, the hydraulic oil is provided to the steering device; and the hydraulic power steering system disclosed by the utility model can be used for ensuring that the hydraulic power is provided in time during the steering of the vehicle and the stability and safety in the vehicle running process are enhanced.
Description
Technical field
The utility model relates to hybrid vehicle servo-steering field, in particular to a kind of hybrid vehicle hydraulic power-assist steering system.
Background technology
The commercial vehicle/comm..vehicle load is heavy, needs big moment when turning to, and for alleviating the load of chaufeur, commercial vehicle/comm..vehicle generally is equipped with hydraulic pressure assisted steering device, and the Hydraulic Pump in the device provides power by driving engine.Be mechanical connection between the bearing circle of vehicle and the wheel flutter, hydraulic power-assist steering system provides the power-assisted effect when Vehicular turn.
Hybrid vehicle has three kinds of dynamic modes: electric-only mode, hybrid mode and engine mode.Under electric-only mode, driving engine is not worked, and by vehicle mounted dynamic battery electric energy is provided, at this moment, the relay closes of electric hydraulic power-assisted steering system, electric hydraulic pump is started working, and as servo steering system hydraulic oil is provided.Under engine mode, engine operation is that vehicle provides power by driving engine, and at this moment, the electric hydraulic power-assisted steering system relay breaks off, the electric hydaulic air pump inoperative.Under the hybrid mode, be that hydraulic power-assist steering system provides power by driving engine.Because mixed powered car driving engine under electric-only mode is not worked, needing to increase an extra electric hydraulic pump provides hydraulic coupling power for the car load hydraulic power-assist steering system.Based on this; Mixed powered car need be equipped with two cover hydraulic power-assist steering systems; How this two covers hydraulic power-assist steering system is controlled, the environmental demands of the promptness of hydraulic booster, stability, safety and fuel-economizing is a difficult problem of mixed powered car when guaranteeing Vehicular turn simultaneously.
At present, prior art is electric hydraulic pump of extra installation on vehicle, inserts in the original hydraulic power-assist steering system of vehicle through the pipeline of three-way pipe joint with electric hydraulic pump.Promptly the mode of series connection check valve in original hydraulic tubing of vehicle and electric hydraulic pump pipeline guarantees in the unidirectional entering hydraulic power steering gear of hydraulic oil of Hydraulic Pump generation.In sum, the hydraulic tubing valve control system that adopts at present all can guarantee the hydraulic booster system normal operation under engine mode and electric-only mode.Yet, when vehicle when engine mode switches to electric-only mode, from the engine stoping operation to the electric hydraulic pump, start, of short duration hydraulic booster deficient phenomena can appear in pilot process.Promptly when vehicle need turn to; Chaufeur is stepped on brake pedal earlier and is slowed down; Motor vehicle driven by mixed power carries out energy brake and reclaims; Driving engine switches to electric-only mode by engine mode, and this moment, the pilot control bearing circle turned to, and can occur causing the problem laboriously that turns to because of hydraulic power-assisted steering short time disappearance.Safety when this defective has greatly influenced Vehicular turn, stability.And when Vehicular turn; Bearing circle passes to the antagonistic force of chaufeur chaufeur is judged that car behaviour plays crucial effects; Therefore there is temporary servo-steering disappearance problem during Vehicular turn, very easily causes the chaufeur erroneous judgement, influence driving safety.
The utility model content
The utility model provides a kind of hybrid vehicle hydraulic power-assist steering system, in motor vehicle driven by mixed power dynamic mode handoff procedure in the solution prior art, hydraulic booster disappearance problem occurs.
According to an aspect of the present invention, a kind of hybrid vehicle hydraulic power-assist steering system is provided, has comprised: sensor, link to each other with bearing circle, be used to gather the angular signal of bearing circle, confirm according to angular signal whether vehicle is in steering state; Stored energy mechanism links to each other with steering hardware, is used for when Hydraulic Pump output hydraulic oil, and storage hydraulic oil is when sensor confirms that vehicle is in steering state, for steering hardware provides hydraulic oil.
Wherein, above-mentioned stored energy mechanism comprises: accumulator, carry Hydraulic Pump with driving engine and electric hydraulic pump is connected, and be used to store the hydraulic oil that driving engine carries Hydraulic Pump or electric hydraulic pump output; First valve is arranged between accumulator and the steering hardware, and the corner that is used for arriving when sensor acquisition is opened by the control of entire car controller, so that the hydraulic oil in the accumulator flows into steering hardware during greater than first threshold; Second valve is used for when Hydraulic Pump output hydraulic oil, opening, so that hydraulic oil flows into accumulator.
Wherein, above-mentioned first valve is an electromagnetic valve.
Wherein, above-mentioned electromagnetic valve is a two-position two-way solenoid valve.
Wherein, above-mentioned second valve is a hydraulic control one-way valve.
Further; Above-mentioned stored energy mechanism also comprises: the 3rd valve; Carry Hydraulic Pump with driving engine and electric hydraulic pump is connected, open when being used for pressure when accumulator, so that the hydraulic oil flow oil sump tank of the follow-up output of Hydraulic Pump greater than second threshold value; When the pressure in the accumulator is closed during less than the 3rd threshold value, to stop the hydraulic oil flow oil sump tank of the follow-up output of Hydraulic Pump.
Wherein, above-mentioned the 3rd valve comprises: sequence valve, link to each other with accumulator, and open when being used for pressure when accumulator, when the pressure in the accumulator is closed during less than second threshold value greater than first threshold; Hydraulic control one-way valve links to each other with sequence valve, is used for when sequence valve is opened, receive the hydraulic oil effect after, the reverse unlatching is so that the hydraulic oil flow oil sump tank is closed after sequence valve cuts out.
Wherein, the sensor is a rotary angle transmitter.
The hybrid vehicle hydraulic power-assist steering system of the utility model comprises stored energy mechanism and sensor, and wherein, sensor is used to gather the angular signal of bearing circle, confirms according to corner information whether vehicle is in steering state; Stored energy mechanism; Link to each other with steering hardware, be used for when Hydraulic Pump output hydraulic oil storage hydraulic oil; When sensor confirms that vehicle is in steering state; For steering hardware provides hydraulic oil, hydraulic booster when can guaranteeing Vehicular turn, the steering swivel system of the utility model in time is provided, improved stability and safety in the vehicle ' process.
Description of drawings
Fig. 1 is the hybrid vehicle hydraulic power-assist steering system structured flowchart according to the utility model embodiment 1;
Fig. 2 is the structured flowchart according to the stored energy mechanism of the utility model embodiment 1;
Fig. 3 is the control method diagram of circuit according to the hybrid vehicle hydraulic power-assist steering system of the utility model embodiment 2; And
Fig. 4 is the structured flowchart of the hybrid vehicle servo steering system of the utility model embodiment 3.
The specific embodiment
For above-mentioned purpose, the feature and advantage that make the utility model can be more obviously understandable, the utility model embodiment is done further detailed explanation below in conjunction with the accompanying drawing and the specific embodiment.
Present embodiment provides a kind of hybrid vehicle hydraulic power-assist steering system, and this system applies is in existing permanent current formula hydraulic power-assist steering system.
Fig. 1 is the hybrid vehicle hydraulic power-assist steering system structured flowchart according to the utility model embodiment 1.
As shown in Figure 1, this hybrid vehicle hydraulic power-assist steering system 10 comprises following a few part:
Sensor 11 links to each other with the bearing circle of vehicle, is used to gather the angular signal of bearing circle, to confirm whether vehicle is in steering state; Wherein this sensor is to be rotary angle transmitter.
Steering hardware 13, this steering hardware is arranged at this steering hardware 13 both sides for the servo steering device of existing hybrid vehicle, the sensor 11 respectively with stored energy mechanism 12.
For fear of because the bearing circle that chaufeur maloperation or other reasons cause is a Vehicular turn by wrong diagnosis when rotating by a small margin, thereby be the steering hardware fuel feeding, the situation generation that causes consumption of fuel to increase.Whether the sensor can judge angular signal greater than pre-set threshold after collecting angular signal, if confirm that then vehicle is in steering state, if not, think that then vehicle does not turn to.
Because hybrid vehicle has two Hydraulic Pumps; Therefore above-mentioned stored energy mechanism links to each other with Hydraulic Pump and the electric hydraulic pump that driving engine carries; Particularly, be under the different dynamic pattern at vehicle, stored energy mechanism can be stored the hydraulic oil that carries Hydraulic Pump or electric hydraulic pump from driving engine.
Fig. 2 is the structured flowchart according to the stored energy mechanism of the utility model embodiment 1.
As shown in Figure 2, this stored energy mechanism 12 comprises following component part:
Accumulator 121 carries Hydraulic Pump with driving engine and electric hydraulic pump is connected, and is used to store the hydraulic oil that driving engine carries Hydraulic Pump or electric hydraulic pump output; First valve 122 is arranged between accumulator and the steering hardware, be used for when sensor acquisition to corner open during greater than first threshold; Second valve 123 is used for when Hydraulic Pump output hydraulic oil, opening, so that hydraulic oil flows into accumulator.
Above-mentioned first valve is controlled through entire car controller; When sensor judges that the corner collect is greater than first threshold; Angular signal is sent to entire car controller, and this first valve opening of vehicle control unit controls is to open the path between fuel accumulator and the steering hardware; For the ease of entire car controller this first valve is controlled, this first valve can adopt electromagnetic valve.
Wherein, above-mentioned second valve 123 can adopt hydraulic control one-way valve, when Hydraulic Pump output hydraulic oil, because the pressure effect of hydraulic oil can make this fluid-control one-way opening of valves, and then hydraulic oil is flowed in the accumulator like this.
In order to realize controlling the storage content of hydraulic oil in the accumulator through the pressure of hydraulic oil in the stored energy mechanism; Above-mentioned stored energy mechanism can also comprise the 3rd valve; This valve carries Hydraulic Pump with driving engine and electric hydraulic pump is connected; When the pressure in the accumulator during greater than second threshold value because pressure effect self-opening, so that the hydraulic oil of the follow-up output of Hydraulic Pump flows back to fuel tank through this valve, when the pressure of hydraulic oil in accumulator SELF CL during less than the 3rd threshold value.
Consider and to control above-mentioned second valve according to the pressure that the hydraulic oil in the accumulator produces; In order to reach the purpose of accuracy control; Above-mentioned the 3rd valve can be made up of sequence valve and two on fluid-control one-way valve; Wherein the response pressure of sequence valve is a first threshold, when the pressure in the accumulator is opened during greater than first threshold, when the pressure in the accumulator is closed during less than second threshold value.Based on this, above-mentioned second valve also comprises a hydraulic control one-way valve that links to each other with sequence valve, is used for when sequence valve is opened, receive the hydraulic oil effect after, the reverse unlatching so that hydraulic oil flows back to fuel tank through this hydraulic control one-way valve, closed after sequence valve cuts out.
Embodiment 2
Fig. 3 is the control method diagram of circuit according to the hybrid vehicle hydraulic power-assist steering system of the utility model embodiment 2.
As shown in the figure, this method may further comprise the steps:
Step 301: the angular signal of sensor acquisition bearing circle, judge according to angular signal whether vehicle is in steering state;
Step 302: if angular signal is sent to entire car controller;
Step 303: vehicle control unit controls first valve opening, so that the hydraulic oil flow in the accumulator is to steering hardware.
For fear of because the bearing circle that driver's maloperation or other reasons cause is a Vehicular turn by wrong diagnosis when rotating by a small margin, be the steering hardware fuel feeding, the situation that causes consumption of fuel to increase takes place.Carry out above-mentioned steps 301 to step 303, can also carry out following steps:
Sensor is judged according to angular signal whether vehicle turns to and comprised: sensor judges that whether angular signal is greater than first threshold; If confirm that then vehicle is in steering state.
Embodiment 3
It is that improved hybrid-power hydraulic servo steering system is carried out on the basis with permanent current formula hydraulic power-assist steering system that present embodiment provides a kind of.
Fig. 4 is the structured flowchart of the hybrid vehicle servo steering system of the utility model embodiment 3.
As shown in Figure 4, this system comprises following component part:
The working process of the hybrid vehicle servo steering system of present embodiment is specific as follows:
When vehicle did not turn to, the hydraulic oil of Hydraulic Pump output flowed into accumulator 43 through check valve 45, and the pressure of accumulator 43 and hydraulic efficiency pressure system begins to raise; When being elevated to first threshold, sequence valve 41 is opened, along with the increase of hydraulic pressure oil mass in the accumulator; High pressure oil acts on the control end far away of hydraulic control one-way valve 42; Hydraulic control one-way valve 42 is oppositely opened, and the hydraulic oil that Hydraulic Pump produces flows back to fuel tank through hydraulic control one-way valve 42, and the pressure in the hydraulic efficiency pressure system is very low at this moment; Be merely the resistance to flow of pipeline, reduced energy consumption.Need to prove that wherein, this Hydraulic Pump refers to be under the different dynamic modes when vehicle, the Hydraulic Pump of output hydraulic oil, this Hydraulic Pump can carry any in Hydraulic Pump or the electric hydraulic pump for driving engine.
When the driver's operation wheel steering, sensor is sent to entire car controller to the steering wheel angle signal with this signal; Vehicle control unit controls electromagnetic valve 44 is opened; Thereby because hydraulic oil can flow into steering hardware through this electromagnetic valve 44 in the accumulator, for it provides high pressure oil, along with accumulator 43 internal pressures reduce; Sequence valve 41 cuts out, and fluid-control one-way 42 valves cut out subsequently.
In the technical scheme of the utility model; When the vehicle power pattern when electric-only mode switches; From the engine shutdown to the motor, open; Hydraulic power-assist steering system is set up the very of short duration time of powershift process need, and the hydraulic oil of accumulator storage can guarantee this section in the period hydraulic booster can not interrupt.Therefore in the dynamic mode handoff procedure, if the pilot control wheel steering, hydraulic power-assist steering system still can normal operation; Thereby chaufeur can be made right judgement to the running state of vehicle according to the antagonistic force that bearing circle passes over; Therefore, vehicle ' process safe property and stability have been improved, in addition; The utility model is on the basis of original permanent current formula hydraulic power-assist steering system, to reequip, and cost is lower.
Need to prove; In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises key element and also have other identical element.
More than being merely the preferred embodiment of the utility model, is not the protection domain that is used to limit the utility model.Any modification of being done within all spirit and principles at the utility model, be equal to replacement, improvement etc., all be included in the protection domain of the utility model.
Claims (8)
1. a hybrid vehicle hydraulic power-assist steering system is characterized in that, comprising:
Sensor links to each other with bearing circle, is used to gather the angular signal of said bearing circle, confirms according to said angular signal whether vehicle is in steering state;
Stored energy mechanism links to each other with steering hardware, is used for when Hydraulic Pump output hydraulic oil, storing said hydraulic oil, when said sensor confirms that said vehicle is in steering state, for said steering hardware provides hydraulic oil.
2. system according to claim 1 is characterized in that, said stored energy mechanism comprises:
Accumulator carries Hydraulic Pump with driving engine and electric hydraulic pump is connected, and is used to store the hydraulic oil that said driving engine carries Hydraulic Pump or the output of said electric hydraulic pump;
First valve is arranged between said accumulator and the said steering hardware, and the corner that is used for arriving when said sensor acquisition is opened by the control of entire car controller, so that the hydraulic oil in the said accumulator flows into said steering hardware during greater than first threshold;
Second valve is used for when said Hydraulic Pump is exported hydraulic oil, opening, so that said hydraulic oil flows into said accumulator.
3. system according to claim 2 is characterized in that, said first valve is an electromagnetic valve.
4. system according to claim 3 is characterized in that, said electromagnetic valve is a two-position two-way solenoid valve.
5. system according to claim 2 is characterized in that, said second valve is a hydraulic control one-way valve.
6. system according to claim 2 is characterized in that, said stored energy mechanism also comprises:
The 3rd valve; Carry Hydraulic Pump with said driving engine and electric hydraulic pump is connected; Open when being used for pressure when said accumulator greater than second threshold value; So that the hydraulic oil flow oil sump tank of the follow-up output of said Hydraulic Pump, when the pressure in the said accumulator is closed during less than the 3rd threshold value, to stop the hydraulic oil flow oil sump tank of the follow-up output of said Hydraulic Pump.
7. system according to claim 6 is characterized in that, said the 3rd valve comprises:
Sequence valve links to each other with said accumulator, opens when being used for pressure when said accumulator greater than first threshold, when the pressure in the said accumulator is closed during less than second threshold value;
Hydraulic control one-way valve links to each other with said sequence valve, is used for when said sequence valve is opened, receive the hydraulic oil effect after, the reverse unlatching is so that the hydraulic oil flow oil sump tank is closed after said sequence valve cuts out.
8. system according to claim 1 is characterized in that, said sensor is a rotary angle transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220250646 CN202624354U (en) | 2012-05-30 | 2012-05-30 | Hydraulic power steering system of hybrid vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220250646 CN202624354U (en) | 2012-05-30 | 2012-05-30 | Hydraulic power steering system of hybrid vehicle |
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| Publication Number | Publication Date |
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| CN202624354U true CN202624354U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220250646 Expired - Lifetime CN202624354U (en) | 2012-05-30 | 2012-05-30 | Hydraulic power steering system of hybrid vehicle |
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| CN (1) | CN202624354U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700605A (en) * | 2012-05-30 | 2012-10-03 | 潍柴动力股份有限公司 | Hydraulic power-assisted steering system of hybrid vehicle and control method for hydraulic power-assisted steering system |
| CN103407487A (en) * | 2013-08-15 | 2013-11-27 | 杭州世宝汽车方向机有限公司 | Energy-saving hydraulic power steering system |
| CN103481944A (en) * | 2013-09-23 | 2014-01-01 | 湖南南车时代电动汽车股份有限公司 | Power-assisted steering system for new energy bus and control method of power-assisted steering system |
| CN111301519A (en) * | 2019-10-30 | 2020-06-19 | 东风特汽(十堰)客车有限公司 | Anti-drop high-pressure steering auxiliary device |
-
2012
- 2012-05-30 CN CN 201220250646 patent/CN202624354U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700605A (en) * | 2012-05-30 | 2012-10-03 | 潍柴动力股份有限公司 | Hydraulic power-assisted steering system of hybrid vehicle and control method for hydraulic power-assisted steering system |
| CN103407487A (en) * | 2013-08-15 | 2013-11-27 | 杭州世宝汽车方向机有限公司 | Energy-saving hydraulic power steering system |
| CN103481944A (en) * | 2013-09-23 | 2014-01-01 | 湖南南车时代电动汽车股份有限公司 | Power-assisted steering system for new energy bus and control method of power-assisted steering system |
| CN111301519A (en) * | 2019-10-30 | 2020-06-19 | 东风特汽(十堰)客车有限公司 | Anti-drop high-pressure steering auxiliary device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |