WO2024044886A1 - Procédé et système de déviation d'une énergie électrique régénérée - Google Patents

Procédé et système de déviation d'une énergie électrique régénérée Download PDF

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Publication number
WO2024044886A1
WO2024044886A1 PCT/CN2022/115494 CN2022115494W WO2024044886A1 WO 2024044886 A1 WO2024044886 A1 WO 2024044886A1 CN 2022115494 W CN2022115494 W CN 2022115494W WO 2024044886 A1 WO2024044886 A1 WO 2024044886A1
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WO
WIPO (PCT)
Prior art keywords
subsystem
hydraulic
electrical power
power
regenerated
Prior art date
Application number
PCT/CN2022/115494
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English (en)
Inventor
Karine BENIRSCHKE
Georg Mallebrein
Dominik Thomas Hoffmann
Nils Steker
Sebastian Oschmann
Steffen Rose
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to PCT/CN2022/115494 priority Critical patent/WO2024044886A1/fr
Publication of WO2024044886A1 publication Critical patent/WO2024044886A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/58—Combined or convertible systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/10—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels by utilising wheel movement for accumulating energy, e.g. driving air compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/58—Combined or convertible systems
    • B60T13/585—Combined or convertible systems comprising friction brakes and retarders
    • B60T13/586—Combined or convertible systems comprising friction brakes and retarders the retarders being of the electric type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D61/00—Brakes with means for making the energy absorbed available for use

Definitions

  • the present invention relates to a method and a system for diverting electrical power or en-ergy regenerated in a first subsystem.
  • Mobile working machines such as excavators, reach stackers or pile drilling machines, may include components that are electrically driven by an electric machine.
  • a second subsys-tem of the working machine is controlled to receive at least part of the regenerated electrical power (or energy) , when an electrical power supply of the working machine is incapable of completely receiving the regenerated electrical power (or energy) . Accordingly, an overload-ing of the electrical power supply or charging above the limits of the electrical power supply (e.g. battery) can be avoided and additional measures (e.g. load resistance) for dissipating power/energy from the first subsystem are not necessary.
  • additional measures e.g. load resistance
  • a method of operating a working machine comprising an electrically driven first subsystem having an electrical power supply and a second subsystem, comprises con-trolling the first subsystem to regenerate electrical energy, storing a first part of the regener-ated electrical energy in the electrical power supply, and diverting a second part (the at least part above) of the electrical energy to the second subsystem.
  • the at least part of the regenerated electrical power that is received by the sec-ond subsystem exceeds the actual (current or normal) power requirement of the second sub-system (during reception of the at least part of the regenerated electrical power) .
  • the actual (current, normal) power requirement denotes the power requirement of the second subsys-tem in order to drive components of the second subsystem in accordance with control signals (e.g. based on a user input) for the components. That is, the actual (current, normal) power requirement is the power that is required by the components of the second subsystem in or-der to perform their normal functional operation.
  • the received regenerated pow-er is higher than the power that is required by the components of the second subsystem in order to perform the normal (current) function of the second subsystem at the time of recep-tion.
  • the second subsystem is a hydraulic subsystem including an electric motor (or electric machine) that drives a hydraulic pump, wherein a pressure and/or a volume flow of hydraulic fluid output by the hydraulic pump is changed.
  • the pressure and/or the volume flow may be increased with respect to the normal pressure and/or the volume flow that is provided by the hydraulic pump in a (normal) operation of the second subsystem, i.e., when no regenerated electrical power is received by the second subsystem in excess of the actual power requirement of the second subsystem. That is, the received electrical power is converted into hydraulic power.
  • the change in pressure and/or volume flow may include an increase in pressure and/or volume flow starting from their normal values (to increased/higher values) followed by a decrease in pressure and/or volume flow back to their normal values.
  • the second subsystem includes a retarder valve and/or an unloading valve, in particular connected to a hydraulic supply line and to a tank for hydraulic fluid; wherein the retarder valve and/or unloading valve is controlled to open such that throttle losses occur, in particular such that the throttle losses correspond to power received during reception of the at least part of the regenerated electrical power in excess of the actual power requirement of the second subsystem.
  • electrical power is transformed into hydraulic power (by the electric motor and the hydraulic pump of the second subsystem) and hydraulic power in excess of the actual power requirement of the second subsystem (e.g. currently needed to drive an implement) is then transformed into heat using the retarder valve (e.g. an adjustable throttle valve) .
  • the unloading valve an excess of volume flow may be guided to the tank.
  • the retarder valve and/or unload-ing valve is opened prior to reception of the at least part of the regenerated electrical power by the second subsystem.
  • first operation i.e. operational state or specific working process
  • the retarder valve and/or unload-ing valve is opened prior to reception of the at least part of the regenerated electrical power by the second subsystem.
  • the second subsystem includes a hydraulic component that is provided with the hydraulic fluid; wherein in a control of the hydraulic component the change in pressure and/or volume flow of the hydraulic fluid is taken into account, in particular such that a force and/or torque and/or movement caused by the hydraulic component is unchanged (with respect to the force and/or torque and/or movement caused, if the pressure and/or volume flow is not changed) . Accordingly, undesired actuation of the hydraulic component may be avoided.
  • the system for diverting electrical power regenerated by an electrical driven first subsystem of a working machine having an electrical power supply comprises a second subsystem of the working machine configured to receive at least part of the regenerated electrical power; and a controller configured to perform the method for diverting electrical power regenerated by an electrical driven first subsystem of a working machine according to an embodiment of the invention.
  • Figure 1 shows a system for diverting regenerated electrical power according to an exempla-ry embodiment.
  • Figure 2 shows another system for diverting regenerated electrical power according to an exemplary embodiment.
  • Figure 3 shows yet another system for diverting regenerated electrical power according to an exemplary embodiment.
  • Figure 4 shows a flow diagram illustrating steps of the method for diverting regenerated elec-trical power according to an exemplary embodiment.
  • Figure 1 shows a system for diverting regenerated electrical power according to an exempla-ry embodiment.
  • FIG 1 shows a system for diverting regenerated electrical power according to an exempla-ry embodiment.
  • possible flow paths of regenerated power are indicated by arrows.
  • at least on controller may be included in the system, which controller is configured to perform or implement a method according to the invention by controlling the system or at least parts of the system (particularly the second subsystem) .
  • the system comprises an exemplary first subsystem that is electrically powered (driven) .
  • the first subsystem includes an electric machine 2, an inverter 4 (first inverter) and a slew gear- ing 6.
  • the inverter 4 is electrically connected to a power supply system including a power supply 8 in order to supply the electric machine 4 with electric power.
  • the power supply 8 is a battery.
  • the power supply may also be or include an electric supply network (e.g. power grid) .
  • the first subsystem is an electric slew drive of a working machine such as an excavator in which a cab of the excavator is rotated with respect to an undercar-riage of the excavator.
  • the rotation of the cab with respect to an undercarriage may be slowed down by utilizing the electric machine 2 to convert kinetic energy into electric energy, which is supplied to the power supply system 8 through the inverter 4. That is, during certain operations of the working machine (in the shown example the deceleration of the slew drive) power/energy may be regenerated (recuperated) by the first subsystem and transferred to the power supply system.
  • the electric machine 2 may drive components of another type.
  • the electric machine may drive a hydraulic ma-chine which supplies a hydraulic system, such as a travel drive (having a hydraulic motor) of the working machine or a hydraulically actuated (by hydraulic cylinders) implement of the working machine.
  • a hydraulic system such as a travel drive (having a hydraulic motor) of the working machine or a hydraulically actuated (by hydraulic cylinders) implement of the working machine.
  • energy may be regenerated in case the working ma-chine is braking or is travelling down hill or in case an implement or part thereof (e.g. boom of an excavator) is lowered.
  • the system of Figure 1 comprises an exemplary second subsystem which includes an electric motor 12 (or electric machine) , an inverter 14 (second inverter) , a hydraulic pump 16 and an adjustable retarder valve 18 (adjustable throttle valve) .
  • the inverter 14 is electri-cally connected to the power supply system and to the electric motor 12 such that the electric motor 12 is supplied with electric power.
  • the electric motor 12 is arranged to drive the hy-draulic pump 16 (e.g. coupled with a drive shaft of the pump.
  • the hydraulic pump 16 is a variable displacement pump, for example.
  • the hydraulic pump 16 is arranged to supply hy-draulic components 22 (not explicitly shown; e.g. a hydraulic motor and/or hydraulic cylinders) of the second subsystem with pressurized hydraulic fluid over a hydraulic supply line 20 that is connected to an output of the pump.
  • An input of the pump may be connected to a tank.
  • the adjustable retarder valve 18 is connected to the supply line 20 and the tank and the sec-ond subsystem is further configured to control an adjustable flow of hydraulic fluid from the supply line 20 to the tank, wherein in a closed state of the retarder valve 18 no flow to the tank occurs and the flow may be adjusted by gradually opening the retarder valve 18. For example, by adjusting a cross section of an orifice of the retarder valve 18.
  • the system may optionally comprise other (auxiliary) components 24 that are electrically connected to the power supply system in order to be supplied with electric power.
  • the other components 24 may include one or more of a fan, a coolant pump, and the like.
  • the (average or peak) power requirement of such other components 24 is much lower (e.g. lower than 10%or 5%) than (peak) power requirements of the first and second subsystems and/or the peak power regenerated by the first subsystem.
  • a relatively high amount of power is regenerated (in terms of wattage and/or in terms of energy) by the first subsystem.
  • a slew drive of an excavator may situationally regenerate 50 kW for 2 to 3 s (seconds) or a slew drive of a pile drilling machine may situationally regenerate up to 150 kW for 0.1 to 0.2 s.
  • the regenerat-ed power may exceed the power that is consumed by the second subsystem in normal oper-ation and optionally the other components at the same time.
  • the power supply may be incapable to receive the regenerated electrical power completely or incapable to receive the regenerated electrical power that ex-ceeds the power required by the second subsystem and/or other (electrical) components at the same time the power is regenerated.
  • the first for-mulation “incapable to receive the regenerated electrical power completely”
  • the latter case “incapable to receive the regenerated electrical power that exceeds the power required by the second subsystem and/or other (electrical) components at the same time the power is regenerated” ) as well.
  • the second subsystem may be controlled to change (e.g. increase) the pressure and/or volume flow of hydraulic fluid provided by the hydraulic pump.
  • the rota-tional speed of the electric motor 12 may be changed and/or a swash angle of the variable displacement pump 14 may be adjusted in order to change the pressure and/or volume flow.
  • This may be seen as changing (in particular increasing) the hydraulic power in the (hydraulic) second subsystem, wherein the received power exceeds the actual power requirement of hydraulically driven components of the second subsystem.
  • the retarder valve 18 may be adjusted to (gradually) open such that a throttled flow of hydraulic fluid through the retarder valve 18 occurs. Accordingly, throttle losses occur, i.e. the excess of hydraulic power may be converted into heat (throttle losses) .
  • an undesired actuation or disturbance may be a change with respect to desired values of a force or torque provided by a hydraulic component (hy-draulic cylinder or motor) and/or of a in linear or rotational speed of the hydraulic component.
  • the desired values may be provided by a control unit of the second subsystem, e.g. based on a user input.
  • pressure and volume flow to the hydraulic components is provid-ed independently of the pressure of the hydraulic pump by using pressure compensators.
  • a pressure increase in supply line 22 does typically not lead to undesired actu-ation or disturbance of the hydraulic components 22.
  • the retarder valve 18 may be opened and a higher pump pressure may be specified over a load sensing line.
  • the displacement of the variable displacement pump 16 will in-crease such that the electric motor 14 of the pump has to deliver more mechanical power and consumes more electrical power. That is, the retarder valve 18 acts as an additional hy-draulic load (i.e. in addition to the hydraulic components 22) in the load sensing system.
  • an increase in volume flow may, for example, be diverted to the tank using a retarder valve 18 as shown and/or an unloading valve that is present in the hy-draulic second subsystem.
  • the control of the hydraulic components 22 may op-tionally be adjusted to take the increased pressure of the hydraulic fluid into account.
  • aproportional valve controlling the flow of hydraulic fluid to a hydraulic cylinder may be con-trolled to open less as compared to an unchanged pressure.
  • a by-pass valve be-tween the supply line 20 and a load sensing line of the load sensing system (not shown) , in particular, when an increase in displacement of the pump is not sufficient to absorb the re- ceived regenerated electric power in the (hydraulic) second subsystem.
  • a pressure drop across the by-pass valve may be used to increase the pump pressure and avoid an opening of a pressure relieve valve of the load sensing line.
  • Similar measures for increasing the pressure of hydraulic fluid supplied by the hydraulic pump may be implemented in an electronic load sensing control.
  • the increase in volume flow may be diverted to the tank using a retarder valve 18 as shown and/or an unloading valve that is present in the hydraulic second subsys-tem.
  • the control of the hydraulic components 22 may optionally be adjusted to take the increased pressure of the hydraulic fluid into account.
  • a proportional valve con-trolling the flow of hydraulic fluid to a hydraulic cylinder may be controlled to open less as compared to an unchanged pressure.
  • E-valve In such systems (e.g. without load sensing) a so-called “E-valve” may be used in order to achieve that the pump pressure corresponds to a target value. The additional power is then compensated for by adjusting the displacement of the pump.
  • a further additional or alternative measure is to control the retarder valve to start opening pre-emptively prior to the reception of the regenerated electrical power through the second subsystem.
  • a corre-sponding point in time when such a control is to be started, may be determined based on detection of a certain operation (operational state) of the working machine and/or based on detection of a certain control signal (e.g. user input) .
  • the retarder valve may be controlled to open when is determined that an element driven by the slew drive is rotating, such that it likely that power is regenerated as soon as the rotation stops or slows down.
  • the opening of the retarder valve may be started in reaction to detection of a control signal to stop or slow down the rotation (which due to latencies may lead to an opening of the retarder valve prior to the time of reception of the regenerated elec-trical power at the second subsystem) . It is also possible to determine an opening degree of the retarder valve for the pre-emptive opening based on the detected operation (or properties thereof) of the working machine. For example, based on the rotational speed of the slew drive or based on a travel speed in case of a hydraulic travel drive. In any case a state of the power supply, e.g. a loading state of a battery, may be taken into account.
  • a state of the power supply e.g. a loading state of a battery
  • FIG. 2 shows another system for diverting regenerated electrical power according to an exemplary embodiment.
  • the second subsystem includes an electric motor 12 (or electric machine) , an inverter 14 (second inverter) , a hydraulic pump 16 and a flywheel mass 26 (e.g. a flywheel) or rotational mass.
  • the inverter 14 is electrically connected to the power supply system and to the electric motor 12 such that the electric motor 12 is supplied with electric power.
  • the electric motor 12 is arranged to drive the hydraulic pump 16, e.g. an out-put shaft of the electric motor coupled with a drive shaft of the pump.
  • the hydraulic pump 16 is a variable displacement pump for example.
  • the hydraulic pump 16 is arranged to supply hydraulic components 22 (not explicitly shown; e.g. a hydraulic motor and/or hydraulic cylin-ders) of the second subsystem with pressurized hydraulic fluid over a hydraulic supply line 20 that is connected to an output of the pump.
  • An input of the pump may be connected to a tank.
  • the flywheel mass 26 is coupled to the drive shaft of the hydraulic pump 16 and/or the output shaft of the electric motor 12.
  • the flywheel mass 26 may be accelerated (by the additional torque provided by the electric motor 12 when additional power is received) such that the kinetic energy of the flywheel mass 26 is increased and may later (after reception of the regenerated electrical power in the second subsystem) be used to (partially) drive the pump 16 and decelerate the flywheel mass corre-spondingly.
  • a suitable moment of inertial of the flywheel mass 26 may be 2 kg ⁇ m/s 2 , for example.
  • an increase in volume flow may be throttled towards the tank using a retarder valve and/or an unloading valve (cf. above) , as it may only partially possible to compensate an increase in volume flow by adjusting the displacement of the pump 16.
  • Figure 3 shows yet another system for diverting regenerated electrical power according to an exemplary embodiment.
  • the second subsystem includes a capacitor 28 for buffer-ing electrical power.
  • the capacitor 28 is a supercapacitor. Terminals of the ca-pacitor 28 are electrically connected to the power supply system.
  • a switch 30 is provided paral-lel to a diode, such that a flow of electrical current to the power supply (corresponding to a flow of electricity when the power supply is charged) is prevented when the switch 30 is opened and possible when the switch 30 is closed.
  • the switch 30 When the power supply 8 is incapable to receive the regenerated electrical power completely, the switch 30 may be opened, such that regenerated electrical power is diverted to the capacitor 28 and electrical energy is stored in the capacitor 30 temporarily.
  • a capacity of the capacitor 28 e.g. supercapacitor
  • its voltage may be increased from 700 V to 1000 V, for example.
  • the flywheel mass as shown in figure 2 may be addi-tionally provided in the second subsystem.
  • the second subsystem may be controlled to firstly use received power to accelerate the flywheel mass as far as possible (e.g. as far as possible without disturbing the function of components of the second subsys-tem that are supplied with hydraulic fluid or as far as technically possible) and to secondly open the retarder valve (or any other valve employed in a similar manner) to allow a throttled flow of hydraulic fluid to the tank such that throttle losses occur.
  • the sys-tem of Figure 1 or of Figure 2 may additionally be provided with a capacitor which can be connected to the electrical supply in a switchable manner as shown in Figure 3.
  • received regenerated power having a high but short peak value in term of wattage
  • received regenerated power having a lower peak value but a relatively high amount of energy in term of watt-hours
  • all three embodiments of Figures 1, 2 and 3 may be combined as well.
  • Figure 4 shows a flow diagram illustrating steps of the method for diverting regenerated elec-trical power according to an exemplary embodiment. Reference is also made to the descrip-tion of Figures 1 to 3, which includes an extensive description of at least parts of the follow-ing steps, which description is not repeated.
  • step 100 electrical power is regenerated (recuperated) by the first subsystem.
  • the regen-erated electrical power may be detected and/or calculated (e.g. using measurements and/or a model) .
  • Step 100 is not part of the method for diverting regenerated electrical power but shown to completely show the process of regenerating and diverting the regenerated power. If step 100 is included in the method, a regeneration method (recuperation method) for a system as described in the preceding is obtained.
  • step 110 it is determined whether the power supply is incapable to receive the regenerated electrical power completely. This determination may be made based on one or more of a detection of at least one predefined operation (i.e. operational state or specific working process) of the working machine, a charging level of a battery of the power supply, an amount of regenerated electrical power.
  • a detection of at least one predefined operation i.e. operational state or specific working process
  • a charging level of a battery of the power supply i.e. operational state or specific working process
  • step 120 in the case that the power supply is incapable to receive the regenerated electri-cal power completely
  • the second subsystem of the working machine is controlled to receive at least part of the regenerated electrical power.
  • step 130 the hydraulic components are controlled such that an increase in pressure and/or volume flow is taken into account during the reception of regenerated power in the second subsystem.
  • step 120 and/or step 130 may also include that other than hydraulic power sinks are activated, such as using a capacitor (in particular supercapacitor) to store short power pulses or using the rotational mass by accelerating the electric motor to receive a regenerated power peak.
  • a capacitor in particular supercapacitor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Un procédé et un système qui sont utilisés pour dévier une énergie électrique régénérée par un premier sous-système entraîné électriquement d'une machine de travail (2) comprenant une alimentation électrique (8) sont divulgués, lorsque l'alimentation électrique (8) n'est pas en mesure de recevoir complètement l'énergie électrique régénérée, un second sous-système de la machine de travail (2) étant commandé pour recevoir au moins une partie de l'énergie électrique régénérée (120).
PCT/CN2022/115494 2022-08-29 2022-08-29 Procédé et système de déviation d'une énergie électrique régénérée WO2024044886A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2022/115494 WO2024044886A1 (fr) 2022-08-29 2022-08-29 Procédé et système de déviation d'une énergie électrique régénérée

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Application Number Priority Date Filing Date Title
PCT/CN2022/115494 WO2024044886A1 (fr) 2022-08-29 2022-08-29 Procédé et système de déviation d'une énergie électrique régénérée

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WO2024044886A1 true WO2024044886A1 (fr) 2024-03-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6170587B1 (en) * 1997-04-18 2001-01-09 Transport Energy Systems Pty Ltd Hybrid propulsion system for road vehicles
CN102596666A (zh) * 2009-07-27 2012-07-18 法国原子能及替代能源委员会 用于汽车的具有改进制动分配的混合制动系统
US20130158827A1 (en) * 2011-12-16 2013-06-20 Caterpillar, Inc. Mining Truck And Regenerative Braking Strategy Therefor
CN103635636A (zh) * 2011-06-29 2014-03-12 卡特彼勒公司 用于控制具有电气和/或液压装置的机器中的动力的系统
US20140116243A1 (en) * 2012-10-25 2014-05-01 Tenneco Automotive Operating Company Inc. Recuperating passive and active suspension

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6170587B1 (en) * 1997-04-18 2001-01-09 Transport Energy Systems Pty Ltd Hybrid propulsion system for road vehicles
CN102596666A (zh) * 2009-07-27 2012-07-18 法国原子能及替代能源委员会 用于汽车的具有改进制动分配的混合制动系统
CN103635636A (zh) * 2011-06-29 2014-03-12 卡特彼勒公司 用于控制具有电气和/或液压装置的机器中的动力的系统
US20130158827A1 (en) * 2011-12-16 2013-06-20 Caterpillar, Inc. Mining Truck And Regenerative Braking Strategy Therefor
US20140116243A1 (en) * 2012-10-25 2014-05-01 Tenneco Automotive Operating Company Inc. Recuperating passive and active suspension

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