CN104527403B - Power-driven system for large-scale oil-electricity hybrid power road sweeper and control strategy thereof - Google Patents

Abstract

The invention discloses a power-driven system for a large-scale oil-electricity hybrid power road sweeper and a control strategy of the power-driven system for the large-scale oil-electricity hybrid power road sweeper. The power-driven system for the large-scale oil-electricity hybrid power road sweeper comprises: power of an engine is delivered by a transmission, the power is switched between an operation system and a running system through a power switching device, one end of a battery pack is connected with a 220V charger, the other end of the battery pack is connected with an electrical machine, the coupling is carried out on the electrical machine and the power, switched to the running system through the power switching device, of the engine through a torsion coupler, and the power is output to a driving wheel. By using the power system to drive the system, the power system only needs one engine, and the power of the engine equivalent to the power of an assistant engine of an original vehicle. Under the mode of the cleaning and the transition, the engine is capable of operating at a higher load rate. The fuel economy and the discharge are clearly improved.

Description

A kind of large-scale oil electric mixed dynamic road sweeper power-driven system and its control Strategy

Technical field

The present invention relates to road sweeper field, is a kind of power drive line of large-scale oil electric mixed dynamic road sweeper System and its control strategy.

Background technology

Road sweeper, as a kind of sanitation equipment, is a kind of height for integrating road cleaning, garbage reclamation and transport Effect cleaning equipment.With the fast development of China's urban road, road sweeper wide market.Traditional sweeper is more two Reequiped above class automobile chassis, be equipped with two engines.Transition only has sustainer to work when transporting, and assistant engine is not busy Put；During cleaning work, sustainer rate of load condensate is very low, and fuel consumption and emission is all very poor, two simultaneous firings, makes an uproar Sound is big.On large-scale road sweeper, two engine powers are all very big, and car load use cost is high, also bring to chassis arrangement Certain difficulty.

Pure electric cleaning car is applied as a kind of new forms of energy sanitation cart in some cities, and it is in the course of the work There is provided energy by battery pack, not fuel consumption, be capable of achieving zero-emission, noise is little, but due to high cost and continuous working period it is short The problems such as, it is limited only at present on mini motor sweeper or Purely sweeping type sweeper.

Extended-range electric cleaning car is compared with pure electric cleaning car, although can to a certain extent reduce being manufactured into for car load This simultaneously extends continuous working period, can be applied on middle-size and small-size sweeper, but large-scale road sweeper is to cleaning ability Requirement is higher, and operating system (especially blower fan) power demand is very big, according to range-extending technique, implements cost still very It is high.For case above, herein by using a set of new hybrid electric drive system for being applied to large-scale road sweeper, In the case where cost is controlled, energy consumption and the discharge of sweeper are effectively reduced.

The content of the invention

The present invention provides a kind of power-driven system and its control strategy of large-scale oil electric mixed dynamic road sweeper, can Realize that engine can expeditiously work when transition is transported and is cleaned, and play battery power as much as possible, reach section The purpose that can be reduced discharging.

With reference to accompanying drawing, it is described as follows：

A kind of large-scale oil electric mixed dynamic road sweeper power-driven system, engine 1 is cut by speed changer 2 and power Changing device 4 is connected, and two output ends of switchover apparatus 4 are connected respectively with clearing apparatus 3 and clutch 5, and clutch 5 is another End is connected by torsion coupler 6 with driving wheel 7；On the other hand, the one end of power battery pack 9 is connected with 220V chargers 8, another End is connected with motor 10, and the output end of motor 10 is connected by torsion coupler 6 with driving wheel 7, places at switchover apparatus One position sensor detects the mode of operation of sweeper；One distance travelled sensor is installed at wheel, is recorded from garage Clean for the first time after outputing operating mode to the cleaning mileage Sq in the time at current time and from this transition start to current time when Interior transition mileage Sz；Install whether a pressure sensor detection envelope departs from vehicle frame at envelope and frame contact.

A kind of large-scale oil electric mixed dynamic road sweeper power-driven system control strategy,

When under cleaning modes, engine drives respectively purging system and driving system, battery electric quantity to ensure institute with motor The power consumption demand of desired daily operating time, battery SOC is detected when in cleaning modes and reaches the lower limit for allowing electric discharge Alarm, forces to terminate same day cleaning task；

When under transition Transportation Model, engine drives driving system with motor in parallel hybrid power mode：

1) when distance travelled sensor detects Sq more than Lq, when Sz is more than Lz,

Lq：For daily most short cleaning mileage, Lz：Two for lie farthest away clean the distance between place

Think that the same day cleans task and completes, if now detecting battery electric quantity state SOC more than 0.4, into " power consumption mould Formula ", control strategy ensures engine as far as possible in the low load region work that economic work is interval, and generate electricity less Multifunctional electric, as far as possible will Unnecessary electricity is finished, and makes full use of the electric energy stored by battery, reduces the consumption of fuel oil；

2) if detecting Sq more than Lq, and Sz is proceeded to after " power modes " when being more than Lz, position sensor is detected again Cleaning gear is placed in switchover apparatus, " power modes " are now exited, into cleaning modes, cleaning modes is proceeded to every time Afterwards, Sz automatic clears, Sq continues to increase；

If 3) set up when Sq is different more than Lz more than Lq and Sz, control strategy during transition is " guarantor's power mode ", is controlled Strategy ensures that engine, as far as possible in the high load region work that economic work is interval, charges more few electricity consumption, as far as possible to protecting battery more Electricity is deposited, is to clean operating mode to provide safeguard；

If 4) detect SOC less than 0.4, " guarantor's power mode " is in all the time in transition；

If 5) pressure sensor detects envelope and separates with vehicle frame, illustrate that lifting mechanism is emptied carrying out rubbish, toppled over Carriage return storehouse is opened into rear preparation, is now proceeded to " power modes ".

Beneficial effects of the present invention：

1st, the size and quality of engine are reduced, are conducive to chassis to arrange, engine in both modes all have compared with High rate of load condensate, improves the oil consumption and discharge of car load；

2nd, it is combination drive in parallel during transition, realizes that engine high-efficiency works using the discharge and recharge of battery pack, further Improve fuel economy；

3rd, driving system is used when the control strategy causes both to can guarantee that enough electricity for cleaning, and be can guarantee that again and is completed The same day is finished the unnecessary electricity of battery when cleaning task, makes full use of battery power, reduces fuel consumption.

Description of the drawings

Fig. 1 is the power-driven system structural representation of the present invention；

Fig. 2 is control strategy figure under transition pattern；

Fig. 3 is engine economic work interval graph.

Wherein：1st, engine；2nd, speed changer；3rd, clearing apparatus；4th, switchover apparatus；5th, clutch；6th, torque coupling Device；7th, driving wheel；8th, 220V chargers；9th, power battery pack；10th, motor

Specific embodiment

Below in conjunction with accompanying drawing, the present invention is described in detail.

The mode switching manner of power-driven system of the present invention is to realize sweeping machine by the switchover apparatus The switching between two kinds of operating modes is transported and cleaned in transition；Wherein：

The transition operating mode is：Engine power is accessed driving system by switchover apparatus by model selection handle, Power coupling is carried out by torsion coupler and motor, drives vehicle to travel in the way of parallel hybrid power；

It is described cleaning operating mode be：Engine power is accessed clearing apparatus by switchover apparatus by model selection handle, Clutch separation, by motor driving system is operated alone, and engine is operated alone clearing apparatus.

In FIG, when transition is transported, the incoming switchover apparatus of engine power Jing speed changers will by operation handle Power accesses driving system, now clutch engagement, and engine power reaches torsion coupler, on the other hand, power battery pack Power to motor so as to coupled by torsion coupler with the power that engine is passed over, jointly travel driving wheel.In figure In 1, during cleaning work, power is accessed and cleaned by the incoming switchover apparatus of engine power Jing speed changers by operation handle Device, by engine driving clearing apparatus, now clutch separation, by motor driving wheel traveling is operated alone.Powershift is filled Put and the power that the transmission of engine Jing speed changers comes is accessed into clearing apparatus, locking system locking, motor receives power battery pack Energy Jing planetary gears is operated alone driving wheel.

In FIG, when sweeper does not work, power battery pack can be charged by 220V chargers.

In fig. 2, the mode of operation that a position sensor detects sweeper is placed at switchover apparatus, at wheel One distance travelled sensor is installed, record cleans for the first time operating mode in the cleaning in the time at current time after outputing from garage Journey Sq and start to the transition mileage Sz in the time at current time from this transition, a pressure is installed at envelope and frame contact Whether force snesor detection envelope departs from vehicle frame.1) when distance travelled sensor detect Sq more than Lq (Lq be it is daily most Short cleaning mileage), when Sz is more than Lz (Lz is the distance between two cleaning places of lie farthest away), it is believed that the same day cleans task Complete, if now detecting battery electric quantity state SOC more than 0.4, into " power modes ", control strategy ensures that engine is use up May be in the interval low load region work of economic work, generate electricity less Multifunctional electric, is as far as possible finished unnecessary electricity, makes full use of electricity Electric energy stored by pond, reduces the consumption of fuel oil；If 2) detecting Sq more than Lq, and Sz proceeds to " power consumption mould when being more than Lz Afterwards position sensor detects switchover apparatus and is placed in cleaning gear formula " again, now exits " power modes ", into cleaning mould Formula, proceeds to every time after cleaning modes, Sz automatic clears, and Sq continues to increase；If 3) set up when Sq is different more than Lz more than Lq and Sz, Then control strategy during transition is " guarantor's power mode ", and control strategy ensures engine as far as possible in the high load capacity that economic work is interval Area works, and charges few electricity consumption more, is to clean operating mode to provide safeguard as far as possible to electricity is preserved battery more；If 4) detect SOC to be less than 0.4, then it is in " guarantor's power mode " all the time in transition；If 5) pressure sensor detects envelope and separates with vehicle frame, lifting is illustrated Mechanism is emptied carrying out rubbish, prepares to open carriage return storehouse after the completion of toppling over, and is now proceeded to " power modes ".

In figure 3, when engine is operated between torque capacity curve and economic work area lower limit curve, fuel economy Preferably.With reference to Fig. 3, the such as table 1 of the control strategy under " guarantor's power mode "：1) when battery SOC is more than upper limit soc_hi for allowing to charge, If car load demand torque T is more than engine torque capacity Te_max to be reached under the rotating speed, motor is provided under the rotating speed Torque capacity Tm_max to be reached, engine provides unmet demand torque, if car load demand torque T is less than under the rotating speed The lower limit Te_min in engine economic work area, engine provides required torque T, and motor does not work, if the torque of car load demand is situated between Between Te_min and Te_max, it is (T-Tm_max) and the higher value in Te_min that engine provides torque, and motor provides surplus Remaining demand torque；2) when battery SOC is less than next high level soc_cg of charging upper limit soc_hi is allowed, if car load demand torque T is more than engine torque capacity Te_max to be reached under the rotating speed, and engine provides torque capacity Te_max, and motor is helped Power, if car load demand torque T is less than the lower limit Te_min in engine economic work area under the rotating speed, it is (T that engine provides torque + Tsoc) with Te_min in higher value (Tsoc for battery charging, Tchg is charging coefficient, and soc_lo is that battery allows electric discharge lower limit), if car load demand torque T between Te_min and Te_max it Between, it is (T+Tsoc) and smaller value in Te_max that engine provides torque, and battery charges；3) battery SOC between soc_hi with When between soc_cg, if car load demand torque T is more than engine torque capacity Te_max to be reached under the rotating speed, start Machine provides torque capacity Te_max, motor power-assisted, if car load demand torque T is less than under engine economic work area under the rotating speed Limit Te_min, motor torque is Te_min, while charge the battery, if car load demand torque T is between Te_min and Te_max Between, engine is provided separately torque needed for car load.

With reference to Fig. 3, the such as table 2 of the control strategy under " power modes "：1) battery SOC is more than more than soc_lo one low value During soc_cd, if car load demand torque T is more than engine torque capacity Te_max to be reached under the rotating speed, motor is provided Lower torque capacity Tm_max to be reached of the rotating speed, engine provides unmet demand torque, if car load demand torque T is less than being somebody's turn to do The lower limit Te_min in engine economic work area under rotating speed, it is Te_min that engine provides torque, while charge the battery, if whole Between Te_min and Te_max, it is larger in Te_min and (T-Tm_max) that engine provides torque to car demand torque T Value, motor provides unmet demand torque；2) when battery SOC is less than electric discharge lower limit soc_lo (being set to 0.25), if car load demand torque T More than engine torque capacity Te_max to be reached under the rotating speed, engine provides torque capacity Te_max, motor not work Make, if car load demand torque T is less than the lower limit Te_min in engine economic work area under the rotating speed, it is (T+ that engine provides torque Tsoc ') with Te_min in higher value (Tsoc ' for battery charging, Tchg is charging coefficient), if car load demand torque T is between Te_min and Te_max, it is (T+ that engine provides torque Tsoc ') with Te_max in smaller value, while charging the battery；3) when battery SOC is between soc_lo and soc_cd, if Car load demand torque T is more than engine torque capacity Te_max to be reached under the rotating speed, and engine provides torque capacity Te_max, motor power-assisted, if car load demand torque T starts less than the lower limit Te_min in engine economic work area under the rotating speed Machine provides torque Te_min, while charge the battery, if car load demand torque T is between Te_min and Te_max, engine Required torque T is provided separately.

Table 1 is the control strategy under " guarantor's power mode "

Control strategy during table 2 under " power modes "

Claims (1)

1. a kind of large-scale oil electric mixed dynamic road sweeper power-driven system control strategy, it is characterised in that：

When under cleaning modes, engine drives respectively purging system and driving system, battery electric quantity to ensure required with motor Daily operating time power consumption demand, detect when in cleaning modes battery SOC reach allow electric discharge lower limit Times It is alert, force to terminate same day cleaning task；

When under transition Transportation Model, engine drives driving system with motor in parallel hybrid power mode：

1) when distance travelled sensor detects Sq more than Lq, when Sz is more than Lz,

Lq：For daily most short cleaning mileage, Lz：Two for lie farthest away clean the distance between place

Think that the same day cleans task and completes, if now detecting battery electric quantity state SOC more than 0.4, into " power modes ", Control strategy ensures engine as far as possible in the low load region work that economic work is interval, and generate electricity less Multifunctional electric, as far as possible will be unnecessary Electricity be finished, make full use of the electric energy stored by battery, reduce the consumption of fuel oil；

2) if detecting Sq more than Lq, and Sz is proceeded to after " power modes " when being more than Lz, position sensor detects dynamic again Power switching device is placed in cleaning gear, now exits " power modes ", into cleaning modes, proceeds to every time after cleaning modes, Sz Automatic clear, Sq continues to increase；

If 3) set up when Sq is different more than Lz more than Lq and Sz, control strategy during transition is " guarantor's power mode ", control strategy Ensureing that engine, as far as possible in the high load region work that economic work is interval, charges more few electricity consumption, as far as possible to preserving electricity battery more Amount, is to clean operating mode to provide safeguard；

If 4) detect SOC less than 0.4, " guarantor's power mode " is in all the time in transition；

If 5) pressure sensor detects envelope and separates with vehicle frame, illustrate that lifting mechanism is emptied carrying out rubbish, after the completion of toppling over Carriage return storehouse is opened in preparation, is now proceeded to " power modes ".