WO2014166313A1 - New energy vehicle and hybrid driving electric-hydraulic power-assisted steering system thereof - Google Patents
New energy vehicle and hybrid driving electric-hydraulic power-assisted steering system thereof Download PDFInfo
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- WO2014166313A1 WO2014166313A1 PCT/CN2014/072221 CN2014072221W WO2014166313A1 WO 2014166313 A1 WO2014166313 A1 WO 2014166313A1 CN 2014072221 W CN2014072221 W CN 2014072221W WO 2014166313 A1 WO2014166313 A1 WO 2014166313A1
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- oil
- power steering
- auxiliary
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- storage tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
Definitions
- the present invention relates to a new energy vehicle and a hybrid-driven electrohydraulic power steering system thereof. Background technique
- the electro-hydraulic power steering system or EHPS for short, is widely used in new energy vehicles, especially pure electric vehicles and deep hybrid vehicles.
- the power steering system used in the traditional new energy bus is a single-steering motor single-pump structure, that is, the steering assist of the vehicle is completely provided by a steering motor.
- Chinese patent CN102424068A discloses an automobile hydraulic electric power steering system, which comprises a hydraulic pump and a motor for driving the hydraulic pump.
- the oil inlet of the hydraulic pump is connected with the oil storage tank, and the oil outlet of the hydraulic pump passes through a one-way valve.
- the accumulator Connected to the accumulator, the accumulator is connected to the steering assist cylinder, and the steering assist cylinder is connected to the accumulator.
- the working principle of the system is that the control device is used to set the pressure control threshold in the collected hydraulic accumulator to the range value, and according to the preset condition, determine to output an appropriate control signal to the motor to control the starting and stopping of the motor, specifically
- the preset conditions are as follows: The required oil pressure threshold is calculated in real time according to the vehicle speed signal and the steering wheel angle signal, and the required oil pressure threshold and the oil pressure in the accumulator are compared, and the judgment result of whether or not the control signal is output is obtained.
- the control unit If the comparison result is lower than the lower limit value, the pressure in the hydraulic accumulator is low, and the control unit outputs a control command to start the motor and the hydraulic pump to provide high-pressure oil for the steering assist cylinder; if the comparison result is higher than the upper limit To characterize the high pressure in the hydraulic accumulator, the control unit outputs a control command to stop the motor and the hydraulic pump from operating. Since the system adopts a single-steer motor single-pump structure, in the actual operation of the vehicle, once the motor or oil circuit fails or fails, it cannot provide steering assist to the steering assist cylinder, especially when the vehicle is running at high speed, the steering assist disappears. The danger is even greater, and even the car is ruined.
- the hybrid-driven electrohydraulic power steering system of the present invention adopts the following technical solutions:
- the hybrid-driven electro-hydraulic power steering system includes a storage tank and a power steering gear, and a main hydraulic unit for providing a main drive hydraulic pressure to the power steering gear between the oil storage tank and the power steering gear, and the main hydraulic unit includes a series connection in series a main hydraulic pump and a main check valve on the oil passage between the oil outlet of the oil tank and the oil inlet of the power steering gear, the main hydraulic pump is driven by the main driving device, and the main check valve and the power steering device are arranged There is a tee, the oil outlet of the tee is connected with the oil inlet of the power steering, the main check valve is arranged at one oil inlet of the tee; the oil tank and the power steering device are also provided with a boost
- the steering gear provides an auxiliary hydraulic unit for assisting driving hydraulic pressure, and the auxiliary hydraulic unit includes an auxiliary hydraulic pump and an auxiliary check valve which are sequentially connected
- An overflow valve is connected in series with the oil passage between the three-way oil outlet and the oil inlet of the power steering gear, and the oil outlet of the overflow valve is connected with the oil inlet of the power steering, and the overflow port is connected with the oil storage tank. .
- the main drive device is an automotive main motor
- the auxiliary drive device is an auxiliary steering motor.
- the new energy vehicle of the present invention adopts the following technical solutions:
- a new energy vehicle including a frame and an electrohydraulic power steering system mounted on the frame, the system including an oil storage tank and a power steering, an oil storage tank and a power steering
- the one-way valve, the main hydraulic pump is driven by the main driving device, the three-way is arranged between the main check valve and the power steering, the oil outlet of the three-way is connected with the oil inlet of the power steering, and the main check valve is set At an oil inlet of the tee; an auxiliary hydraulic unit for providing auxiliary driving hydraulic pressure to the power steering gear is further disposed between the oil storage tank and the power steering gear, and the auxiliary hydraulic unit comprises another series of oil storage tanks connected in series Auxiliary hydraulic pump and auxiliary check valve on the oil passage between the oil port and the other oil inlet of the tee, the auxiliary hydraulic pump is driven by the auxiliary drive device, and the auxiliary check valve is set in the three-way Should the oil inlet.
- An overflow valve is connected in series with the oil passage between the three-way oil outlet and the oil inlet of the power steering gear, and the oil outlet of the overflow valve is connected with the oil inlet of the power steering, and the overflow port is connected with the oil storage tank. .
- the main drive device is an automotive main motor
- the auxiliary drive device is an auxiliary steering motor.
- the electric hydraulic power steering system adopting the above structure, since the auxiliary hydraulic unit and the tee are added in addition to the main hydraulic unit in the system, the two hydraulic units are connected through the three-way and the power steering, so that the main hydraulic unit is assisted.
- Steering gear provides main drive hydraulics, as well as auxiliary hydraulics
- the auxiliary drive hydraulic pressure is provided for the power steering gear, and the three-way ensures that the driving hydraulic pressure provided by the two hydraulic units meets in the three-way, and together provides the driving hydraulic pressure for the power steering.
- the power steering device is assisted by two driving hydraulic pressures, that is, the main driving device works under normal conditions, the main hydraulic pump provides power for the power steering device; when the main driving device is not working, the auxiliary driving device Working, the auxiliary hydraulic pump assists the power steering; when the main drive and the auxiliary drive work simultaneously, it provides a synergy for the power steering. Therefore, the main hydraulic unit of the whole system is used as the first power source, and the auxiliary hydraulic unit is used as the second power source. When the first power source fails or fails, the second power source ensures the power steering demand of the power steering gear. The reliability and safety of the steering system and the new energy vehicles using the system prevent accidents in the vehicle.
- FIG. 1 is a schematic structural view of an electrohydraulic power steering system according to the present invention.
- FIG. 1 An embodiment of the electro-hydraulic power steering system of the present invention: as shown in FIG. 1 , comprising an oil storage tank 3 , a power steering gear 5 and a tee 8 , the oil storage tank 3 has two oil outlets and a oil return port, and the power is assisted
- the diverter 5 has an oil inlet port and an oil outlet port
- the tee 8 has two oil inlet ports and one oil outlet port, wherein one of the three-way oil inlet port is a main oil inlet port and the other is an auxiliary oil inlet port;
- One of the oil outlets of the oil storage tank 3 is connected with the three-way main oil inlet port, and the other oil outlet port is connected with the three-way auxiliary oil inlet port, and the power steering oil inlet port is connected with the three-way oil outlet port, and the oil outlet port is connected.
- a main hydraulic unit is disposed between the three-way main oil inlet and the corresponding oil storage tank outlet, and the main hydraulic unit includes a main hydraulic pump 4 and a main check valve 7 which are sequentially connected in series on the corresponding oil passage, and the main hydraulic pump 4
- the transmission belt 2 is connected with the main motor 1 of the automobile, the main motor 1 is the main driving device, and the main check valve 7 is arranged at the main oil inlet of the three-way, under the action of the main motor 1 and the main check valve 7,
- the hydraulic pump 4 provides a main drive hydraulic pressure for the power steering gear 5; an auxiliary hydraulic unit is provided between the three-way auxiliary oil inlet and the corresponding oil storage port outlet, and the auxiliary hydraulic unit includes an auxiliary hydraulic pressure serially connected in series on the corresponding oil passage.
- the pump 10 and the auxiliary check valve 9, the auxiliary hydraulic pump 10 and the auxiliary steering motor 11 are drivingly connected, the auxiliary steering motor 11 is an auxiliary driving device, and the auxiliary check valve 9 is disposed at the three-way auxiliary oil inlet, in the auxiliary steering motor 11
- the auxiliary hydraulic pump provides auxiliary drive hydraulic pressure to the power steering gear 5 under the action of the auxiliary check valve 9.
- the hydraulic oil passing through the main hydraulic pump 4 becomes high pressure oil, and the high pressure oil is passed through.
- the main check valve 7 and the three-way valve 8 enter the power steering device 5 to operate the power steering device 5, and the main check valve 7 prevents the high-pressure oil from passing backwards; when the auxiliary steering motor 11 is in operation, the auxiliary hydraulic pump 10 is passed.
- the hydraulic oil becomes high-pressure oil, and the high-pressure oil enters the power steering device 5 via the auxiliary check valve 9 and the three-way 8 to make the power steering device 5 work, and the auxiliary check valve 9 is used to prevent the high-pressure oil from flowing backward; when the main motor 1 When the auxiliary motor 11 is working at the same time, the two high-pressure oils meet in the tee 8 and then enter the power steering device 5 to make the power steering work.
- an overflow valve 6 is connected in series between the oil outlet of the three-way oil outlet and the oil inlet of the power steering, and the oil outlet of the overflow valve is connected with the oil inlet of the power steering, the overflow port and the oil storage.
- the tank is connected so as to ensure that the pressure of the high pressure oil entering the power steering gear 5 by the tee 8 is constant.
- the specific working principle of the above embodiment is as follows: The system is applied to a new energy vehicle. Since the main driving device is the main motor 1 of the automobile, the working state of the main hydraulic pump 4 and the auxiliary hydraulic pump 10 is related to the working state of the automobile, that is, when the vehicle When the original steering, reverse and coasting feedback, the main motor 1 does not rotate or reverse, the auxiliary steering motor 11 works, only the auxiliary hydraulic pump 10 provides steering assist to the power steering 5; when the vehicle advances at low speed, the main motor 1 rotates forward. When the rotational speed is lower than the rotational speed threshold, the assist provided by the main hydraulic pump 4 cannot meet the steering demand.
- the auxiliary steering motor 11 also works, and the power steering gear 5 obtains the resultant force; when the vehicle advances at a high speed, the main motor 1 rotates at the forward speed. Above the speed threshold, the assist provided by the main hydraulic pump 4 satisfies the steering demand, and the auxiliary steering motor 11 stops operating.
- the primary drive can also be the engine of a car.
- the embodiment of the new energy vehicle of the present invention comprises: a frame and an electrohydraulic power steering system mounted on the frame.
- the structure of the system is as shown in FIG. 1 , which is consistent with the structure of the electrohydraulic power steering system of the above embodiment. The content thereof will not be described here.
Abstract
A new energy vehicle and a hybrid driving electric-hydraulic power-assisted steering system thereof. In the system, a main hydraulic unit is arranged between an oil storage tank (3) and a power-assisted steering device (5), and comprises a main hydraulic pump (4) and a main non-return valve (7). The main hydraulic pump is driven by a main drive device (1); a tee joint (8) is arranged between the main non-return valve and the power-assisted steering device; an oil outlet of the tee joint is connected to an oil inlet of the power-assisted steering device. An auxiliary hydraulic unit is arranged between the oil storage tank and the power-assisted steering device, and comprises an auxiliary hydraulic pump (10) and an auxiliary non-return valve (9). The auxiliary hydraulic pump is driven by an auxiliary drive device (11), and the auxiliary non-return valve is correspondingly arranged at the oil inlet of the tee joint. The main hydraulic unit of the system functions as a first power assisting source, and the auxiliary hydraulic unit functions as a second power assisting source. Once the first power assisting source goes wrong or is in failure, the second power assisting source can still meet the power assisting requirement of the power-assisted steering device, so that the reliability and security of the steering system and of the new energy vehicle using the system are improved.
Description
说明书 新能源汽车及其混合驱动的电动液压助力转向系统 技术领域 本发明涉及一种新能源汽车及其混合驱动的电动液压助力转向系统。 背景技术 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new energy vehicle and a hybrid-driven electrohydraulic power steering system thereof. Background technique
电动液压助力转向系统， 简称 EHPS, 广泛应用于新能源汽车上， 尤其 是纯电动汽车和深度混合动力汽车。 传统的新能源客车采用的助力转向系 统为单转向电机单油泵结构， 即车辆的转向助力完全由一个转向电机提供。 The electro-hydraulic power steering system, or EHPS for short, is widely used in new energy vehicles, especially pure electric vehicles and deep hybrid vehicles. The power steering system used in the traditional new energy bus is a single-steering motor single-pump structure, that is, the steering assist of the vehicle is completely provided by a steering motor.
如中国专利 CN102424068A公开了一种汽车液压电动助力转向系统， 该 系统包括液压泵以及驱动液压泵的电机， 液压泵的进油口与储油罐连接， 液压泵的出油口通过一个单向阀与储能器连接， 储能器与转向助力油缸连 接， 转向助力油缸与储油罐连接。 该系统的工作原理为， 采用控制装置将 采集到的液压储能器中的压力控制阈值设为范围值， 并根据预设条件确定 输出合适的控制信号至电动机， 控制电动机的启动和停止， 具体的预设条 件为： 实时根据车速信号和转向盘转角信号计算所需油压阈值， 比较所需 油压阈值和储能器内油压， 并获得是否输出控制信号的判断结果。 若比较 结果低于下限值则表征液力储能器中的压力低， 则控制部件输出控制命令 启动电机和液压泵工作， 为转向助力油缸提供高压油； 若比较结果高于上 限值则表征液力储能器中的压力高， 则控制部件输出控制命令停止电机和 液压泵工作。 由于该系统采用单转向电机单油泵结构， 车辆在实际运行过 程中， 一旦电机或油路出现故障或失效， 就无法为转向助力油缸提供转向 助力， 尤其是在车辆高速运行时， 转向助力的消失危险性更大， 甚至车毁 人亡。 For example, Chinese patent CN102424068A discloses an automobile hydraulic electric power steering system, which comprises a hydraulic pump and a motor for driving the hydraulic pump. The oil inlet of the hydraulic pump is connected with the oil storage tank, and the oil outlet of the hydraulic pump passes through a one-way valve. Connected to the accumulator, the accumulator is connected to the steering assist cylinder, and the steering assist cylinder is connected to the accumulator. The working principle of the system is that the control device is used to set the pressure control threshold in the collected hydraulic accumulator to the range value, and according to the preset condition, determine to output an appropriate control signal to the motor to control the starting and stopping of the motor, specifically The preset conditions are as follows: The required oil pressure threshold is calculated in real time according to the vehicle speed signal and the steering wheel angle signal, and the required oil pressure threshold and the oil pressure in the accumulator are compared, and the judgment result of whether or not the control signal is output is obtained. If the comparison result is lower than the lower limit value, the pressure in the hydraulic accumulator is low, and the control unit outputs a control command to start the motor and the hydraulic pump to provide high-pressure oil for the steering assist cylinder; if the comparison result is higher than the upper limit To characterize the high pressure in the hydraulic accumulator, the control unit outputs a control command to stop the motor and the hydraulic pump from operating. Since the system adopts a single-steer motor single-pump structure, in the actual operation of the vehicle, once the motor or oil circuit fails or fails, it cannot provide steering assist to the steering assist cylinder, especially when the vehicle is running at high speed, the steering assist disappears. The danger is even greater, and even the car is ruined.
发明内容 Summary of the invention
本发明的目的是提供一种混合驱动的电动液压助力转向系统， 用以解 决现有转向系统采用单转向电机单油泵结构造成的系统可靠性不高的问题。 同时本发明还提供了一种使用该转向系统的新能源汽车。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a hybrid drive electro-hydraulic power steering system for solving the problem of low system reliability caused by the single steering motor single oil pump structure of the existing steering system. At the same time, the present invention also provides a new energy vehicle using the steering system.
本发明的混合驱动的电动液压助力转向系统采用如下技术方案： 一种
混合驱动的电动液压助力转向系统， 包括储油罐和助力转向器， 储油罐和 助力转向器之间设有为助力转向器提供主驱动液压的主液压单元， 主液压 单元包括依次串联在储油罐一个出油口和助力转向器进油口之间的油路上 的主液压泵和主单向阀， 主液压泵由主驱动装置驱动， 所述主单向阀与助 力转向器之间设有三通， 三通的出油口与助力转向器的进油口连接， 主单 向阀设置在三通的一个进油口处； 所述储油罐和助力转向器之间还设有为 助力转向器提供辅助驱动液压的辅助液压单元， 辅助液压单元包括依次串 联在储油罐另一个出油口和三通另一个进油口之间的油路上的辅助液压泵 和辅助单向阀， 辅助液压泵由辅助驱动装置驱动， 辅助单向阀设置在三通 对应的进油口处。 The hybrid-driven electrohydraulic power steering system of the present invention adopts the following technical solutions: The hybrid-driven electro-hydraulic power steering system includes a storage tank and a power steering gear, and a main hydraulic unit for providing a main drive hydraulic pressure to the power steering gear between the oil storage tank and the power steering gear, and the main hydraulic unit includes a series connection in series a main hydraulic pump and a main check valve on the oil passage between the oil outlet of the oil tank and the oil inlet of the power steering gear, the main hydraulic pump is driven by the main driving device, and the main check valve and the power steering device are arranged There is a tee, the oil outlet of the tee is connected with the oil inlet of the power steering, the main check valve is arranged at one oil inlet of the tee; the oil tank and the power steering device are also provided with a boost The steering gear provides an auxiliary hydraulic unit for assisting driving hydraulic pressure, and the auxiliary hydraulic unit includes an auxiliary hydraulic pump and an auxiliary check valve which are sequentially connected in series on the oil passage between the other oil outlet of the oil storage tank and the third oil inlet port, and auxiliary The hydraulic pump is driven by an auxiliary drive, and the auxiliary check valve is placed at the corresponding oil inlet of the tee.
所述三通出油口与助力转向器进油口之间的油路上串联有溢流阀， 溢 流阀的出油口与助力转向器的进油口连接、 溢流口与储油罐连接。 An overflow valve is connected in series with the oil passage between the three-way oil outlet and the oil inlet of the power steering gear, and the oil outlet of the overflow valve is connected with the oil inlet of the power steering, and the overflow port is connected with the oil storage tank. .
所述主驱动装置为汽车主电机， 所述辅助驱动装置为辅助转向电机。 本发明的新能源汽车采用如下技术方案： 一种新能源汽车， 包括车架 以及安装在车架上的电动液压助力转向系统， 该系统包括储油罐和助力转 向器， 储油罐和助力转向器之间设有为助力转向器提供主驱动液压的主液 压单元， 主液压单元包括依次串联在储油罐一个出油口和助力转向器进油 口之间的油路上的主液压泵和主单向阀， 主液压泵由主驱动装置驱动， 所 述主单向阀与助力转向器之间设有三通， 三通的出油口与助力转向器的进 油口连接， 主单向阀设置在三通的一个进油口处； 所述储油罐和助力转向 器之间还设有为助力转向器提供辅助驱动液压的辅助液压单元， 辅助液压 单元包括依次串联在储油罐另一个出油口和三通另一个进油口之间的油路 上的辅助液压泵和辅助单向阀， 辅助液压泵由辅助驱动装置驱动， 辅助单 向阀设置在三通对应的进油口处。 The main drive device is an automotive main motor, and the auxiliary drive device is an auxiliary steering motor. The new energy vehicle of the present invention adopts the following technical solutions: A new energy vehicle, including a frame and an electrohydraulic power steering system mounted on the frame, the system including an oil storage tank and a power steering, an oil storage tank and a power steering There is a main hydraulic unit between the devices for providing the main drive hydraulic pressure for the power steering, and the main hydraulic unit includes a main hydraulic pump and a main line which are sequentially connected in series between the oil outlet of the oil storage tank and the oil inlet of the power steering gear. The one-way valve, the main hydraulic pump is driven by the main driving device, the three-way is arranged between the main check valve and the power steering, the oil outlet of the three-way is connected with the oil inlet of the power steering, and the main check valve is set At an oil inlet of the tee; an auxiliary hydraulic unit for providing auxiliary driving hydraulic pressure to the power steering gear is further disposed between the oil storage tank and the power steering gear, and the auxiliary hydraulic unit comprises another series of oil storage tanks connected in series Auxiliary hydraulic pump and auxiliary check valve on the oil passage between the oil port and the other oil inlet of the tee, the auxiliary hydraulic pump is driven by the auxiliary drive device, and the auxiliary check valve is set in the three-way Should the oil inlet.
所述三通出油口与助力转向器进油口之间的油路上串联有溢流阀， 溢 流阀的出油口与助力转向器的进油口连接、 溢流口与储油罐连接。 An overflow valve is connected in series with the oil passage between the three-way oil outlet and the oil inlet of the power steering gear, and the oil outlet of the overflow valve is connected with the oil inlet of the power steering, and the overflow port is connected with the oil storage tank. .
所述主驱动装置为汽车主电机， 所述辅助驱动装置为辅助转向电机。 采用上述结构的电动液压助力转向系统， 由于系统中除了主液压单元， 还增加了辅助液压单元和三通， 两个液压单元均通过三通与助力转向器连 接， 这样既有主液压单元为助力转向器提供主驱动液压， 还有辅助液压单
元为助力转向器提供辅助驱动液压， 而且三通还能确保两个液压单元提供 的驱动液压在三通内会合， 共同为助力转向器提供驱动液压。 根据车辆不 同的工况条件， 助力转向器由两路驱动液压为其提供助力， 即正常情况下 主驱动装置工作，主液压泵为助力转向器提供助力；主驱动装置不工作时， 辅助驱动装置工作， 辅助液压泵为助力转向器提供助力； 主驱动装置和辅 助驱动装置同时工作时， 为助力转向器提供助力的合力。 因此， 整个系统 的主液压单元作为第一助力源， 而辅助液压单元作为第二助力源， 一旦第 一助力源出现故障或失效时， 还有第二助力源保证助力转向器的助力需求， 提高了转向系统以及使用该系统的新能源汽车的可靠性和安全性， 防止车 辆发生意外事故。 The main drive device is an automotive main motor, and the auxiliary drive device is an auxiliary steering motor. The electric hydraulic power steering system adopting the above structure, since the auxiliary hydraulic unit and the tee are added in addition to the main hydraulic unit in the system, the two hydraulic units are connected through the three-way and the power steering, so that the main hydraulic unit is assisted. Steering gear provides main drive hydraulics, as well as auxiliary hydraulics The auxiliary drive hydraulic pressure is provided for the power steering gear, and the three-way ensures that the driving hydraulic pressure provided by the two hydraulic units meets in the three-way, and together provides the driving hydraulic pressure for the power steering. According to different working conditions of the vehicle, the power steering device is assisted by two driving hydraulic pressures, that is, the main driving device works under normal conditions, the main hydraulic pump provides power for the power steering device; when the main driving device is not working, the auxiliary driving device Working, the auxiliary hydraulic pump assists the power steering; when the main drive and the auxiliary drive work simultaneously, it provides a synergy for the power steering. Therefore, the main hydraulic unit of the whole system is used as the first power source, and the auxiliary hydraulic unit is used as the second power source. When the first power source fails or fails, the second power source ensures the power steering demand of the power steering gear. The reliability and safety of the steering system and the new energy vehicles using the system prevent accidents in the vehicle.
附图说明 DRAWINGS
图 1为本发明的电动液压助力转向系统的结构示意图。 1 is a schematic structural view of an electrohydraulic power steering system according to the present invention.
具体实施方式 detailed description
本发明的电动液压助力转向系统的实施例：如图 1所示，包括储油罐 3、 助力转向器 5和三通 8， 储油罐 3具有两个出油口和一个回油口， 助力转向 器 5具有一个进油口和一个出油出口， 三通 8具有两个进油口和一个出油 口， 其中一个三通进油口为主进油口、 另一个为辅助进油口； 储油罐 3 的 其中一个出油口与三通主进油口连接、 另一个出油口与三通辅助进油口连 接， 助力转向器进油口与三通出油口连接、 出油口与储油罐回油口连接。 在三通主进油口与对应的储油罐出油口之间设有主液压单元， 主液压单元 包括依次串联在相应油路上的主液压泵 4和主单向阀 7，主液压泵 4通过传 动带 2与汽车的主电机 1传动连接， 主电机 1为主驱动装置， 主单向阀 7 设置在三通主进油口处， 在主电机 1和主单向阀 7的作用下， 主液压泵 4 为助力转向器 5 提供主驱动液压； 在三通辅助进油口与对应的储油罐出油 口之间设有辅助液压单元， 辅助液压单元包括依次串联在对应油路上的辅 助液压泵 10和辅助单向阀 9，辅助液压泵 10与辅助转向电机 11传动连接， 辅助转向电机 11为辅助驱动装置，辅助单向阀 9设置在三通辅助进油口处， 在辅助转向电机 11和辅助单向阀 9的作用下， 辅助液压泵为助力转向器 5 提供辅助驱动液压。 An embodiment of the electro-hydraulic power steering system of the present invention: as shown in FIG. 1 , comprising an oil storage tank 3 , a power steering gear 5 and a tee 8 , the oil storage tank 3 has two oil outlets and a oil return port, and the power is assisted The diverter 5 has an oil inlet port and an oil outlet port, and the tee 8 has two oil inlet ports and one oil outlet port, wherein one of the three-way oil inlet port is a main oil inlet port and the other is an auxiliary oil inlet port; One of the oil outlets of the oil storage tank 3 is connected with the three-way main oil inlet port, and the other oil outlet port is connected with the three-way auxiliary oil inlet port, and the power steering oil inlet port is connected with the three-way oil outlet port, and the oil outlet port is connected. Connect to the oil return port of the tank. A main hydraulic unit is disposed between the three-way main oil inlet and the corresponding oil storage tank outlet, and the main hydraulic unit includes a main hydraulic pump 4 and a main check valve 7 which are sequentially connected in series on the corresponding oil passage, and the main hydraulic pump 4 The transmission belt 2 is connected with the main motor 1 of the automobile, the main motor 1 is the main driving device, and the main check valve 7 is arranged at the main oil inlet of the three-way, under the action of the main motor 1 and the main check valve 7, The hydraulic pump 4 provides a main drive hydraulic pressure for the power steering gear 5; an auxiliary hydraulic unit is provided between the three-way auxiliary oil inlet and the corresponding oil storage port outlet, and the auxiliary hydraulic unit includes an auxiliary hydraulic pressure serially connected in series on the corresponding oil passage. The pump 10 and the auxiliary check valve 9, the auxiliary hydraulic pump 10 and the auxiliary steering motor 11 are drivingly connected, the auxiliary steering motor 11 is an auxiliary driving device, and the auxiliary check valve 9 is disposed at the three-way auxiliary oil inlet, in the auxiliary steering motor 11 The auxiliary hydraulic pump provides auxiliary drive hydraulic pressure to the power steering gear 5 under the action of the auxiliary check valve 9.
当主电机 1工作时， 经过主液压泵 4的液压油变为高压油， 高压油经
主单向阀 7和三通 8进入到助力转向器 5， 使助力转向器 5工作， 主单向阀 7用以防止经过的高压油逆流； 当辅助转向电机 11工作时， 经过辅助液压 泵 10的液压油变成高压油， 高压油经辅助单向阀 9、 三通 8进入助力转向 器 5， 使助力转向器 5工作， 辅助单向阀 9用以防止经过的高压油逆流； 当 主电机 1、 辅助电机 11同时工作时， 两路高压油在三通 8内会合后进入到 助力转向器 5， 使助力转向器工作。 When the main motor 1 is in operation, the hydraulic oil passing through the main hydraulic pump 4 becomes high pressure oil, and the high pressure oil is passed through. The main check valve 7 and the three-way valve 8 enter the power steering device 5 to operate the power steering device 5, and the main check valve 7 prevents the high-pressure oil from passing backwards; when the auxiliary steering motor 11 is in operation, the auxiliary hydraulic pump 10 is passed. The hydraulic oil becomes high-pressure oil, and the high-pressure oil enters the power steering device 5 via the auxiliary check valve 9 and the three-way 8 to make the power steering device 5 work, and the auxiliary check valve 9 is used to prevent the high-pressure oil from flowing backward; when the main motor 1 When the auxiliary motor 11 is working at the same time, the two high-pressure oils meet in the tee 8 and then enter the power steering device 5 to make the power steering work.
作为进一步优化， 在三通出油口和助力转向器进油口之间的油路上串 联有溢流阀 6， 溢流阀出油口与助力转向器进油口连接、溢流口与储油罐连 接， 这样保证由三通 8进入到助力转向器 5的高压油的压力恒定。 As a further optimization, an overflow valve 6 is connected in series between the oil outlet of the three-way oil outlet and the oil inlet of the power steering, and the oil outlet of the overflow valve is connected with the oil inlet of the power steering, the overflow port and the oil storage. The tank is connected so as to ensure that the pressure of the high pressure oil entering the power steering gear 5 by the tee 8 is constant.
上述实施例具体工作原理如下： 该系统应用在新能源汽车上， 由于主 驱动装置为汽车的主电机 1， 主液压泵 4、 辅助液压泵 10的工作状态与汽 车的工作状态有关， 即当车辆原地转向、 倒车及滑行回馈时， 主电机 1 不 转或反转， 辅助转向电机 11工作， 只有辅助液压泵 10为助力转向器 5提 供转向助力； 当车辆低速前进时， 主电机 1 正转转速小于转速阀值， 主液 压泵 4提供的助力无法满足转向需求， 此时， 辅助转向电机 11也工作， 助 力转向器 5得到二者的合力； 当车辆高速前进时， 主电机 1正转转速高于 转速阀值， 主液压泵 4提供的助力满足转向需求， 辅助转向电机 11停止工 作。 The specific working principle of the above embodiment is as follows: The system is applied to a new energy vehicle. Since the main driving device is the main motor 1 of the automobile, the working state of the main hydraulic pump 4 and the auxiliary hydraulic pump 10 is related to the working state of the automobile, that is, when the vehicle When the original steering, reverse and coasting feedback, the main motor 1 does not rotate or reverse, the auxiliary steering motor 11 works, only the auxiliary hydraulic pump 10 provides steering assist to the power steering 5; when the vehicle advances at low speed, the main motor 1 rotates forward. When the rotational speed is lower than the rotational speed threshold, the assist provided by the main hydraulic pump 4 cannot meet the steering demand. At this time, the auxiliary steering motor 11 also works, and the power steering gear 5 obtains the resultant force; when the vehicle advances at a high speed, the main motor 1 rotates at the forward speed. Above the speed threshold, the assist provided by the main hydraulic pump 4 satisfies the steering demand, and the auxiliary steering motor 11 stops operating.
在其他实施例中， 主驱动装置也可以为汽车的发动机。 In other embodiments, the primary drive can also be the engine of a car.
本发明的新能源汽车的实施例： 包括车架以及安装在车架上的电动液 压助力转向系统， 该系统的结构如图 1 所示， 与上述实施例的电动液压助 力转向系统的结构一致， 其内容在此不再赘述。
The embodiment of the new energy vehicle of the present invention comprises: a frame and an electrohydraulic power steering system mounted on the frame. The structure of the system is as shown in FIG. 1 , which is consistent with the structure of the electrohydraulic power steering system of the above embodiment. The content thereof will not be described here.
Claims
1. 一种混合驱动的电动液压助力转向系统， 包括储油罐和助力转向器， 储 油罐和助力转向器之间设有为助力转向器提供主驱动液压的主液压单元， 主液压单元包括依次串联在储油罐一个出油口和助力转向器进油口之间的 油路上的主液压泵和主单向阀，主液压泵由主驱动装置驱动，其特征在于： 所述主单向阀与助力转向器之间设有三通， 三通的出油口与助力转向器的 进油口连接， 主单向阀设置在三通的一个进油口处； 所述储油罐和助力转 向器之间还设有为助力转向器提供辅助驱动液压的辅助液压单元， 辅助液 压单元包括依次串联在储油罐另一个出油口和三通另一个进油口之间的油 路上的辅助液压泵和辅助单向阀， 辅助液压泵由辅助驱动装置驱动， 辅助 单向阀设置在三通对应的进油口处。 A hybrid-driven electro-hydraulic power steering system, comprising an oil storage tank and a power steering system, and a main hydraulic unit for providing a main drive hydraulic pressure to the power steering gear between the oil storage tank and the power steering gear, the main hydraulic unit includes a main hydraulic pump and a main check valve connected in series on an oil passage between an oil outlet of the oil storage tank and the oil inlet of the power steering, the main hydraulic pump being driven by the main driving device, wherein: the main one-way a three-way is arranged between the valve and the power steering, the oil outlet of the three-way is connected with the oil inlet of the power steering, and the main check valve is disposed at one oil inlet of the three-way; the oil storage tank and the power steering There is also an auxiliary hydraulic unit for providing auxiliary drive hydraulic pressure to the power steering gear. The auxiliary hydraulic unit includes auxiliary hydraulic pressure in series on the oil passage between the other oil outlet of the oil storage tank and the third oil inlet and the other oil inlet. The pump and the auxiliary check valve, the auxiliary hydraulic pump is driven by the auxiliary drive, and the auxiliary check valve is arranged at the corresponding oil inlet of the tee.
2. 根据权利要求 1所述的混合驱动的电动液压助力转向系统，其特征在于： 所述三通出油口与助力转向器进油口之间的油路上串联有溢流阀， 溢流阀 的出油口与助力转向器的进油口连接、 溢流口与储油罐连接。 2. The hybrid-driven electrohydraulic power steering system according to claim 1, wherein: an overflow valve is connected in series with the oil passage between the three-way oil outlet and the power steering oil inlet, and the relief valve The oil outlet is connected to the oil inlet of the power steering, and the overflow port is connected to the oil storage tank.
3. 根据权利要求 1或 2所述的混合驱动的电动液压助力转向系统， 其特征 在于：所述主驱动装置为汽车主电机，所述辅助驱动装置为辅助转向电机。 3. The hybrid-driven electrohydraulic power steering system according to claim 1 or 2, wherein the main drive device is an automobile main motor, and the auxiliary drive device is an auxiliary steering motor.
4. 一种新能源汽车， 包括车架以及安装在车架上的电动液压助力转向系统， 该系统包括储油罐和助力转向器， 储油罐和助力转向器之间设有为助力转 向器提供主驱动液压的主液压单元， 主液压单元包括依次串联在储油罐一 个出油口和助力转向器进油口之间的油路上的主液压泵和主单向阀， 主液 压泵由主驱动装置驱动， 其特征在于： 所述主单向阀与助力转向器之间设 有三通， 三通的出油口与助力转向器的进油口连接， 主单向阀设置在三通
的一个进油口处； 所述储油罐和助力转向器之间还设有为助力转向器提供 辅助驱动液压的辅助液压单元， 辅助液压单元包括依次串联在储油罐另一 个出油口和三通另一个进油口之间的油路上的辅助液压泵和辅助单向阀， 辅助液压泵由辅助驱动装置驱动， 辅助单向阀设置在三通对应的进油口处。 4. A new energy vehicle, comprising a frame and an electrohydraulic power steering system mounted on the frame, the system comprising an oil storage tank and a power steering, and a power steering device between the oil storage tank and the power steering gear The main hydraulic unit of the main drive hydraulic pressure is provided, and the main hydraulic unit includes a main hydraulic pump and a main check valve which are sequentially connected in series on an oil passage between an oil outlet of the oil storage tank and the oil inlet of the power steering gear, and the main hydraulic pump is mainly The driving device is driven, wherein: the main check valve and the power steering device are provided with a three-way, the oil outlet of the three-way is connected with the oil inlet of the power steering, and the main check valve is set in the three-way An auxiliary hydraulic unit is provided between the oil storage tank and the power steering device for providing an auxiliary driving hydraulic pressure to the power steering gear, and the auxiliary hydraulic unit comprises a series connection in the oil storage tank and another oil outlet. The auxiliary hydraulic pump and the auxiliary check valve on the oil passage between the three inlets and the auxiliary oil inlet are driven by the auxiliary driving device, and the auxiliary check valve is disposed at the corresponding oil inlet of the three-way.
5. 根据权利要求 4所述的新能源汽车， 其特征在于： 所述三通出油口与助 力转向器进油口之间的油路上串联有溢流阀， 溢流阀的出油口与助力转向 器的进油口连接、 溢流口与储油罐连接。 5. The new energy vehicle according to claim 4, wherein: an overflow valve is connected in series with the oil passage between the three-way oil outlet and the oil inlet of the power steering, and the oil outlet of the overflow valve is The oil inlet connection and the overflow port of the power steering gear are connected to the oil storage tank.
6. 根据权利要求 4或 5所述的新能源汽车， 其特征在于： 所述主驱动装置 为汽车主电机， 所述辅助驱动装置为辅助转向电机。
6. The new energy vehicle according to claim 4 or 5, wherein: the main drive device is an automobile main motor, and the auxiliary drive device is an auxiliary steering motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320170972.6 | 2013-04-08 | ||
| CN 201320170972 CN203158069U (en) | 2013-04-08 | 2013-04-08 | New energy vehicle and hybrid driving electric-hydraulic power-assisted steering system thereof |
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| Publication Number | Publication Date |
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| WO2014166313A1 true WO2014166313A1 (en) | 2014-10-16 |
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ID=49019278
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| PCT/CN2014/072221 WO2014166313A1 (en) | 2013-04-08 | 2014-02-19 | New energy vehicle and hybrid driving electric-hydraulic power-assisted steering system thereof |
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| CN (1) | CN203158069U (en) |
| WO (1) | WO2014166313A1 (en) |
Cited By (2)
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| CN108657266A (en) * | 2017-03-31 | 2018-10-16 | 宝沃汽车（中国）有限公司 | Vehicular turn force aid system and method and electro-motive vehicle |
| US20220135122A1 (en) * | 2020-10-30 | 2022-05-05 | Dana Belgium N.V. | Vehicle steering system |
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| CN203158069U (en) * | 2013-04-08 | 2013-08-28 | 郑州宇通客车股份有限公司 | New energy vehicle and hybrid driving electric-hydraulic power-assisted steering system thereof |
| CN105370531B (en) * | 2015-11-13 | 2017-10-24 | 湖南南车时代电动汽车股份有限公司 | A kind of driving safety system |
| CN109724808B (en) * | 2017-10-27 | 2021-03-23 | 湖南中车时代电动汽车股份有限公司 | Safety auxiliary system reliability testing device |
| 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 |
| CN114248839B (en) * | 2022-01-26 | 2023-04-14 | 湖南三一中型起重机械有限公司 | Vehicle emergency steering hydraulic system and working vehicle |
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