45 results about "Hybrid electric bus" patented technology

The invention relates to a method for cooperatively controlling an air pressure and regenerative brake of a hybrid electric bus, which belongs to the technical field of new-energy vehicles. The method comprises the following steps of: firstly, collecting a current air pressure brake force, a brake pedal travel, a brake pedal travel speed, battery information, motor information and vehicle state information of a hybrid electric bus; secondly, distributing the air pressure brake force and a motor brake force by utilizing a regenerative brake force distribution algorithm; thirdly, cooperatively controlling regenerative brake and an ABS (Antilock Brake System) by utilizing a regenerative brake and ABS cooperative control algorithm; and fourthly, compensating and controlling the air pressure brake force by utilizing an air pressure brake force compensation control algorithm. By utilizing the invention, part resources of the common air pressure brake system and the regenerative brake system of the hybrid electric bus can be fully utilized, the brake energy can be recycled to the maximum extent, the economical efficiency of the entire bus is enhanced, and wheels can be prevented from locking so that the brake safety of the entire bus is improved.

The invention discloses an energy distribution method for a single-shaft parallel-connection hybrid electric bus. A set of road conditions is set according to the bus speed-time historical statistics information of the city bus, and a corresponding set of optimization control parameters is set according to each road condition; driving parameters are collected automatically in the driving process of the bus, the corresponding road condition is judged, a whole bus controller takes the corresponding optimization control parameter and energy distribution mode, and torque output and energy recovery of a motor and an engine of the bus are optimized and adjusted. The energy resources of the single-shaft parallel-connection hybrid electric bus running in a city can be reasonably distributed, and under the condition that an AMT gearbox is carried, the power performance of the whole bus is satisfied. More importantly, fuel consumption and discharge of pollutants are effectively reduced, and fuel economy is improved.

The invention discloses a radiator assembly for a hybrid electric bus. The radiator assembly comprises a motor and controller cooling radiator, an engine cooling radiator, a supercharging intercooler and a cooling fan, wherein the motor and controller cooling radiator and the engine cooling radiator are connected in the same row; the supercharging intercooler is arranged outside the motor and controller cooling radiator and the engine cooling radiator; the engine cooling radiator is close to a hot end of the supercharging intercooler; the motor and controller cooling radiator is close to a cold end of the supercharging intercooler; and the cooling fan is arranged inside the motor and controller cooling radiator and the engine cooling radiator. Since the circulating water passages of the two radiators are independent of each other, the cooling effects of an engine and a motor and controller cooling system are enhanced, and the work and the life of the radiator assembly are guaranteed; and thus, the problem of arrangement of the radiator assembly in an engine driving cabin of the hybrid electric bus is solved.

The invention relates to an integrated motor control and charge device for a hybrid electric bus, comprising a main current transformer, a sub current transformer, a main control unit, a charge interface, a power supply control unit, an electric accessory interface and a charge/drive switchover unit, wherein the alternating-current side of the main current transformer is connected with the charge interface via a charge contactor, and connected with a main motor via a drive contactor; the direct-current side of the main current transformer is serially connected with a switch circuit used for being connected with an onboard energy device; the direct-current side of the sub current transformer is correspondingly connected with the electric accessory interface formed on the device and the direct-current side of the main current transformer respectively; the alternating-current side of the sub current transformer is used for being connected with a power generator; the main control unit is in control connection with the main current transformer and the sub current transformer; the charge/drive switchover unit is used for switchover between charge and drive; and the power supply control unit is used for controlling the switch circuit to perform pre-charge and power-on actions on the device. Via the device, the use quantity of high-voltage wiring harnesses is reduced, the heat productivity of the components is reduced, the cost of the whole bus is decreased, and the valid space of the whole bus is increased.

The invention discloses a plug-in hybrid electric bus electromechanical coupling system which comprises an auxiliary power system region, an energy source region, a transmission system region and a control and signal region. On the basis of the characteristic that a series-parallel plug-in hybrid electromechanical coupling system integrates series hybrid power and parallel hybrid power, the plug-in hybrid electric bus electromechanical coupling system disclosed by the invention can ensure both an engine and a driving motor to work in a high efficiency region under any condition, has wider application range and has the advantages of fulfilling the aims of improving the reliability of a finished automobile and reducing the energy consumption by the high integration and integrated control of the system and meeting the requirement on the mass production.

The invention discloses a pneumatic-electric system of a pneumatic-electric hybrid electric bus, including LNG cylinders, a gas control panel, an electric generator , an air-conditioning compressor, acirculating water pump for a driving motor, a heat dissipation fan for high-pressure cabin, a power battery fire extinguisher and a battery charging port, The LNG cylinder is horizontally laid on theleft side of the middle section of the body, a cylinder collision beam is installed between the hatch door of the LNG cylinder and the LNG cylinder, the gas control panel is arranged at the rear endof the LNG cylinder, a battery is arranged at the bottom of one end of the system, and the battery is arranged at the bottom of the rear end of the body. The invention has the advantages that: the twohigh-pressure cabin cooling fans are located on the roof directly above the high-pressure cabin, The utility model is used for heat dissipation of the high-pressure cabin, and the power battery fireextinguisher is used for extinguishing the power battery in case of an accident. The system has the advantages of high selectivity, reasonable layout, simple and compact structure, better utilizationof the frame space, and better overall stability and safety performance of the pneumatic-electric hybrid electric bus.

The invention provides a plug-in hybrid electric bus power supply system, the positive pole of the 24V battery group is connected with a power switch, the power switch is connected with a ON power switch, an ACC power switch and a start power switch respectively, the connection and disconnection of the coil of a first relay is controlled by the start power switch, the connection and disconnection of the coil of a second relay is controlled by the ON power switch; the positive pole of the12V battery group is connected with the end of the first relay with normal open touch points, and the end of the second relay with normal open touch points, and the constant electric end of the12V drive box control device respectively, the other end of the first relay with normal open touch points is connected with the signal starting end of the 12V drive box control device, the other end of the second relay with normal open touch points is connected with the IG ignition power end of the 12V drive box control device, the 24V vehicle control device and the ACC power switch are connected, the 24V vehicle control device and the 12V drive box control device are connected through a first route CAN bus, and the vehicle is controlled in a power-on and power-off mode by the power system through a CAN communications agreement. The system is novel in design, safe and reliable.

The invention discloses a cyclic operation state testing system and method for a hybrid electric bus. According to the cyclic operation state testing system, a user layer carries out selection of operation states to be tracked, connection confirmation of equipment and setting of basic parameters; an execution layer analyzes actual vehicle CAN signals received from a real-time controller according to settings of the user layer, the related parameters, obtained through analysis, of a motor and an engine are used for judgment of the work modes of the hybrid electric bus, and the vehicle speed signals obtained through analysis are used for vehicle speed display; and the real-time vehicle speed analyzed out by the execution layer, the standard operation state vehicle speed to be tracked and the boundary vehicle speed to be tracked are displayed in an oscillogram of a display layer, and meanwhile the equipment connection state, the actual vehicle speed value, the number of times of vehicle speed overrun and the work mode are displayed in real time. Vehicle speed tracking in a standard cyclic operation state test of the hybrid electric bus is realized.

The invention provides a management system circuit for a hybrid electric bus, in particular to a management system circuit used for a hybrid power of a hybrid electric bus. The management system circuit comprises a hybrid power control circuit and a hybrid power circuit, wherein the hybrid power control circuit comprises an intelligent power module; the hybrid power circuit comprises a storage battery and an ultra-capacitor which are of a parallel-connection structure; the storage battery is connected with the intelligent power module in series; and the ultra-capacitor is connected with the intelligent power module in series. By using the management system circuit used for the hybrid power of the hybrid electric bus, the flexibility of the storage battery access control and the reliability of the system can be ensured; the seamless access or the seamless switch, the flexibility of power distribution and the diversification of charging and discharging modes can be realized, the system efficiency is further improved and the system life is prolonged.

The invention discloses a hybrid electric vehicle control strategy, and relates to a novel dynamic switching method for the speed of a hybrid electric bus. The novel dynamic switching method mainly includes the steps: acquiring acceleration information of the bus; acquiring on-off information of an air conditioner of the bus; acquiring speed information of the bus; determining switching speed of the bus according to the three information parameters; and controlling an automatic clutch according to the switching speed of the bus. The novel dynamic switching method for the speed of the hybrid electric bus can be used for not only meeting the requirements of the clutch on connection and separation, but also meeting the requirements of the clutch on connection and separation after idle speed boost of an engine and the air conditioner, so that oil consumption of the bus can be reduced, smoothness of the bus is improved, and the service life of the clutch is prolonged.