CN202508147U - Hydraulic pressure power-assisted steering device for hybrid motor bus - Google Patents

Abstract

The utility model discloses a hydraulic pressure power-assisted steering device for a hybrid motor bus. The hydraulic pressure power-assisted steering device for the hybrid motor bus comprises a liquid storage pot, an electromotor, a steering oil pump, a safety valve, a first solenoid valve, a second solenoid valve, a pressure sensor, a pressure cylinder, a braking gas storage pot, a controller, a steering wheel, a steering angle sensor, a steering control valve, a mechanical steering gear, a steering linkage, a steering locker arm and a steering power cylinder. When a hybrid motor bus key switch is powered on, a system is initialized, if oil pressure in the pressure cylinder detected by the pressure sensor is under a set value, the first solenoid valve is ended and the second solenoid valve is conducted, then the electromotor is started. When the oil pressure in the pressure cylinder reaches the set value, the electromotor is shut down, the first solenoid valve is conducted and the second solenoid valve is ended. The hydraulic pressure power-assisted steering device for the hybrid motor bus utilizes gas pressure in the braking gas storage pot to drive the pressure cylinder to generate hydraulic pressure by means of gas pushing liquid, rapidly provides hydraulic pressure assistance when the hybrid motor bus changes direction, and achieves the shut-down of the electromotor driven by the oil pump when the hybrid motor bus does not change a direction, so that energy is saved and efficiency is improved.

Description

A kind of hybrid power motorcoach is used hydraulic pressure assisted steering device

Technical field

The utility model relates to a kind of hybrid power motorcoach and uses hydraulic pressure assisted steering device, especially has the steering hardware of the hybrid electric motorcoach of engine shutdown function.

Background technology

Usually, the steering swivel system of mixed power electric car has three kinds of hydraulic power-assisted steerings, electric power steering, automatically controlled servo-steering, and wherein pure electric power steering is also very immature in the application of motorcoach, and automatically controlled servo-steering more complicated cost is high.But on the hybrid electric motorcoach, to realize the engine shutdown operating mode, just must solve the propulsion source problem of hydraulic power-assist steering system.A kind of the most directly way adopts direct motor drive that engine-driven power steerig pump was arranged originally exactly; And the electrical motor energy is Vehicular dynamic battery; But since adopt on the motorcoach be mostly permanent current formula hydraulic power-assist steering system; The electrical motor that just needs to drive liquid pump is in mode of operation always, and this has reduced efficient to a certain degree having wasted the energy.Shut down when vehicle does not turn to if can realize the liquid pump electrical motor, guarantee the steering swivel system normal operation simultaneously, just can energy savings, further improve the efficient of hybrid vehicle.

The utility model content

To above-mentioned prior art; The utility model provides a kind of hybrid power motorcoach to use hydraulic pressure assisted steering device, and basic design is that realization power steerig pump driving motor is shut down when vehicle does not turn to, and when Vehicular turn, starts; Utilize the air pressure of braking gas tank simultaneously; Utilize the mode of pneumatic jack liquid to realize producing the pressure that turns to fluid, when turning to beginning, power steering is provided rapidly, thereby has improved the efficient of hybrid vehicle.The utility model system can be on the basis of traditional hydrostatic steering system, adds corresponding first electromagnetic valve, second electromagnetic valve, pressure cylinder, pressure sensor, controller, steering angle sensor transformation and forms.

In order to solve the problems of the technologies described above, a kind of hybrid power motorcoach of the utility model with the technical scheme that hydraulic pressure assisted steering device is achieved is: comprise fluid reservoir, electrical motor, power steerig pump, safety valve, braking storage tank, steering handwheel, steering control valve, manual steering gear, steering track rod, pitman arm, power cylinder, first electromagnetic valve, second electromagnetic valve, pressure cylinder, pressure sensor, controller and steering angle sensor; Said power steerig pump is by said direct motor drive; Said first electromagnetic valve is the high speed normally open solenoid valve, is used to control the break-make of first oil circuit that forms between said power steerig pump oil outlet and the said steering control valve oil inlet; Said pressure cylinder is a pneumatic jack hydraulic coupling cylinder; One end diameter of pressure cylinder valve body is greater than other end diameter; The end that the valve diameter of said pressure cylinder is bigger is communicated with said braking storage tank, and the less end of the valve diameter of said pressure cylinder is connected with the oil inlet of said steering control valve through said second electromagnetic valve; Said second electromagnetic valve is the high speed normally closed solenoid valve, being communicated with of second oil circuit that is used for forming between control presssure cylinder and the said steering control valve oil inlet; The break-make of said second oil circuit is controlled by said controller, when said second electromagnetic valve is in the outage normally off, cuts off the connection of said second oil circuit; When turning to, said second electromagnetic valve is in the energising conducting state, realizes the connection of said second oil circuit; Said pressure sensor is used to measure the oil pressure that is positioned at steering hydraulic oil one side in the said pressure cylinder; For said controller provides the information of the oil pressure in the pressure cylinder; When oil pressure was not enough, said controller sent the motor start-up instruction to electrical motor, produced high pressure oil thereby drive power steerig pump; Said steering angle sensor is used to measure the rotational angle of said steering handwheel, for said controller provides the rotational angle signal of steering handwheel, is used to judge whether vehicle is in steering state; Said controller carries out the judgement of Vehicular turn state according to the rotational angle signal of the said steering handwheel that said steering angle sensor provides, thereby determines the mode of operation of said electrical motor and said first electromagnetic valve and said second electromagnetic valve.

Prior art is compared, and the beneficial effect of the utility model is:

The utility model has solved and has adopted in the mixed power electric car of engine shutdown scheme; Direct motor drive turns to liquid pump to work always; Relatively take problem a little, the pressure cylinder that utilizes pneumatic jack liquid comes assisted diversion for steering swivel system provides high pressure oil rapidly when the firm startup of electrical motor has not also produced enough high oil pressure; Thereby energy savings has improved efficiency of energy utilization.

Description of drawings

Fig. 1 is the structural representation sketch of a kind of hybrid power motorcoach of the utility model with hydraulic pressure assisted steering device;

Fig. 2 is the workflow diagram of hydraulic pressure assisted steering device shown in Figure 1.

Among the figure: 1-fluid reservoir, 2-electrical motor, 3-power steerig pump, 4-safety valve, 5-first electromagnetic valve, 6-second electromagnetic valve, 7-pressure sensor, 8-pressure cylinder, 9-braking storage tank, 10-controller, 11-steering handwheel, 12-steering angle sensor, 13-steering control valve, 14-manual steering gear, 15-steering track rod, 16-pitman arm, 17-power cylinder.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done to describe in further detail.

As shown in Figure 1, a kind of hybrid power motorcoach of the utility model comprises fluid reservoir 1, electrical motor 2, power steerig pump 3, safety valve 4, first electromagnetic valve 5, second electromagnetic valve 6, pressure sensor 7, pressure cylinder 8, braking storage tank 9, controller 10, steering handwheel 11, steering angle sensor 12, steering control valve 13, manual steering gear 14, steering track rod 15, pitman arm 16 and power cylinder 17 with hydraulic pressure assisted steering device; Said fluid reservoir 1 wherein, said power steerig pump 3, said safety valve 4, said steering handwheel 11, said steering control valve 13, said manual steering gear 14, said steering track rod 15, said pitman arm 16, said power cylinder 17 etc. are all the block construction of conventional steering system.

In the utility model, said electrical motor 2 is used to drive said power steerig pump 3, and said pressure cylinder 8 is used for when said electrical motor 2 is not worked, producing steering oil pressure; Said first electromagnetic valve 5 is the high speed normally open solenoid valve, is used to control the break-make of first oil circuit that forms between said power steerig pump 3 oil outlets and said steering control valve 13 oil inlets; Said pressure cylinder 8 is a pneumatic jack hydraulic coupling cylinder; One end diameter of pressure cylinder valve body is greater than other end diameter; The end that the valve diameter of said pressure cylinder 8 is bigger is communicated with said braking storage tank; The high pressure tank that said braking storage tank 9 uses for brake system of car, air pressure one side that is used to said pressure cylinder 8 provides high pressure gas; The less end of the valve diameter of said pressure cylinder 8 is connected with the oil inlet of said steering control valve 13 through said second electromagnetic valve 6; Said second electromagnetic valve 6 is the high speed normally closed solenoid valve, being communicated with of second oil circuit that is used for forming between control presssure cylinder 8 and said steering control valve 13 oil inlets; The break-make of said second oil circuit generally when not turning to, when said second electromagnetic valve 6 is in the outage normally off, is cut off the connection of said second oil circuit by said controller 10 controls; When turning to, said second electromagnetic valve 6 is in the energising conducting state, realizes the connection of said second oil circuit (as shown in fig. 1, the left side of said pressure cylinder 8 is with said steering control valve 13 oil inlets).

Said pressure sensor 7 is used to measure the oil pressure that is positioned at steering hydraulic oil one side in the said pressure cylinder 8; The oil pressure information of pressure cylinder 8 (left side) is provided for said controller 10; Be lower than setting threshold and when not enough at oil pressure; Said controller 10 sends the motor start-up instruction to electrical motor 2, produces high pressure oil thereby drive power steerig pump 3;

Said steering angle sensor 12 is used to measure the rotational angle of said steering handwheel 11, for said controller 10 provides the rotational angle signal of steering handwheel 11, is used to judge whether vehicle is in steering state; Said controller 10 is according to the mode of operation of the said electrical motor 2 of the signal control of said steering angle sensor 12 and said first electromagnetic valve 5 and said second electromagnetic valve 6; Promptly; Said controller 10 carries out the judgement of Vehicular turn state according to the rotational angle signal of the said steering handwheel 11 that said steering angle sensor 12 provides, thereby determines the mode of operation of said electrical motor 2 and said first electromagnetic valve 5 and said second electromagnetic valve 6; When turning to, said electrical motor 2 starts, the 5 outage conductings of said first electromagnetic valve, the 6 energising conductings of said second electromagnetic valve; When not turning to, said electrical motor 2 is closed, the 5 outage conductings of said first electromagnetic valve, and 6 outages of said second electromagnetic valve end.

In addition, said fluid reservoir 1, said power steerig pump 3, said safety valve 4, said steering handwheel 11, said steering control valve 13, said manual steering gear 14, said steering track rod 15, said pitman arm 16, said power cylinder 17 are all the parts of conventional truck steering swivel system.

As shown in Figure 2, the utility model realizes that the process of hydraulic power-assisted steering is:

When system is in power-up state at the car key switch, at first carry out system initialization, if when oil pressure are lower than preset threshold in the said pressure cylinder that said pressure sensor 7 records 8; Then said first electromagnetic valve 5 by; 6 conductings of said second electromagnetic valve start said electrical motor 2 then, drive said power steerig pump 3 work; After the oil pressure that produces in the said pressure cylinder 8 reaches preset threshold; Said electrical motor 2 is shut down, the 5 outage conductings of said first electromagnetic valve, 6 outages of said second electromagnetic valve by; Said controller 10 judges according to the signal of said steering angle sensor 12 whether vehicle will turn to, if the steering angle that records surpasses defined threshold, judges that then vehicle need turn to; 6 conductings of said second electromagnetic valve of then said controller 10 instructions, the high pressure steering oil in the said pressure cylinder 8 gets into said steering control valve 13, and said power cylinder 17 is gone in the stepping of going forward side by side, and carries out Vehicular turn; Meanwhile, said electrical motor 2 starts, and drives said power steerig pump 3 and produces high pressure oil, provides high-pressure and hydraulic oily for continuing to turn to; When said controller 10 judged that Vehicular turn stops, 6 outages of said second electromagnetic valve of said controller 10 instructions were closed, and instruct said electrical motor 2 to shut down simultaneously; System gets into and turns to wait state.In addition, under steering state, said first electromagnetic valve 5 has the preceence of outage conducting, to guarantee that vehicle turns to function normally.

Above-mentioned embodiment has realized that the hydraulic booster system driving motor shuts down when vehicle does not turn to, when turning to beginning, utilize pneumatic jack hydraulic coupling cylinder that the steering hydraulic power-assisted is provided rapidly, improves energy utilization efficiency.

Below schematically the content and the principle of work of the utility model is described, this description does not have restricted, the also example of the embodiment of the utility model just shown in the accompanying drawing, and practical structure is not limited thereto.So, if those skilled in the art is enlightened by it, create under the situation of aim not breaking away from the utility model, adopt other form, design with similar structure of the utility model and embodiment, also belong to the protection domain of the utility model.

Claims (1)

1. a hybrid power motorcoach is used hydraulic pressure assisted steering device; Comprise fluid reservoir (1), electrical motor (2), power steerig pump (3), safety valve (4), braking storage tank (9), steering handwheel (11), steering control valve (13), manual steering gear (14), steering track rod (15), pitman arm (16) and power cylinder (17), it is characterized in that:

Also comprise first electromagnetic valve (5), second electromagnetic valve (6), pressure cylinder (8), pressure sensor (7), controller (10) and steering angle sensor (12);

Said power steerig pump (3) is driven by said electrical motor (2);

Said first electromagnetic valve (5) is the high speed normally open solenoid valve, is used to control the break-make of first oil circuit that forms between said power steerig pump (3) oil outlet and said steering control valve (13) oil inlet;

Said pressure cylinder (8) is a pneumatic jack hydraulic coupling cylinder; One end diameter of pressure cylinder valve body is greater than other end diameter; The end that the valve diameter of said pressure cylinder (8) is bigger is communicated with said braking storage tank, and the less end of the valve diameter of said pressure cylinder (8) is connected through the oil inlet of said second electromagnetic valve (6) with said steering control valve (13);

Said second electromagnetic valve (6) is the high speed normally closed solenoid valve, being communicated with of second oil circuit that is used for forming between control presssure cylinder (8) and said steering control valve (13) oil inlet; The break-make of said second oil circuit when said second electromagnetic valve (6) is in the outage normally off, is cut off the connection of said second oil circuit by said controller (10) control; When turning to, said second electromagnetic valve (6) is in the energising conducting state, realizes the connection of said second oil circuit;

Said pressure sensor (7) is used to measure the oil pressure that is positioned at steering hydraulic oil one side in the said pressure cylinder (8); For said controller (10) provides the oil pressure information in the pressure cylinder; When oil pressure is not enough; Said controller (10) sends the motor start-up instruction to electrical motor, produces high pressure oil thereby drive power steerig pump (3);

Said steering angle sensor (12) is used to measure the rotational angle of said steering handwheel (11), for said controller (10) provides the rotational angle signal of steering handwheel (11), is used to judge whether vehicle is in steering state;

Said controller (10) carries out the judgement of Vehicular turn state according to the rotational angle signal of the said steering handwheel (11) that said steering angle sensor (12) provides, thereby determines the mode of operation of said electrical motor (2) and said first electromagnetic valve (5) and said second electromagnetic valve (6).

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