A vehicle electric drive system includes an internal combustion engine, an electric motor/generator driven by the engine, a first inverter/rectifier coupled to motor/generator, a bus coupled to the first inverter/rectifier, a second inverter/rectifier coupled to the bus, and a traction motor/generator coupled to an output of the second inverter/rectifier, an operator speed control member, and a controller coupled to the second inverter/rectifier for controlling a current output of the second inverter/rectifier as a function of a position of the speed control member Also included is an operator controlled foot pedal and a transducer coupled to the foot pedal and generating a signal representing foot pedal position which is supplied to the controller The controller limits current supplied by the second inverter/rectifier to the traction motor/generator to a limit current as a function of the transducer signal The controller, foot pedal and transducer cooperate to vary the limit current in response to movement of the foot pedal A spring biases the foot pedal to an upper limit position The controller causes the second inverter/rectifier to supply to the traction motor/generator a maximum amount of current, (such maximum current being a function of the foot pedal position), but not more than that required to achieve the speed commanded by the speed control

Variable current limit control for vehicle electric drive system

A hybrid vehicle includes a control apparatus having an engine controller and a motor controller A first battery and a second battery which has higher voltage than the first battery are provided An electric power generator which is driven by the engine is provided for charging the first battery The second battery and the electric motor are connected through the motor controller, and the first battery or the electric power generator is connected to the motor controller and the engine controller In addition, the first battery or the electric power generator is connected to the engine controller for maintaining a power supply for operation maintenance of the engine controller The second battery and the electric motor are connected through the motor controller The second battery or the electric motor is connected to the motor controller through a DC/DC converter As a result, even if the high voltage line including the electric motor in the control apparatus for the hybrid vehicle has failed, this system can drive the vehicle

Control apparatus for hybrid vehicle

A method for determining a voltage based or current based state of charge (SOC) and state of health (SOH) of a battery system is provided. The method includes: providing a model of the battery system including an equivalent circuit having both low frequency and high frequency elements; establishing a plurality of functional relationships comprising relationship of the equivalent circuit with SOC; reducing at least part of the plurality of functional relationships into a set of time segmented recursive functional relationships, wherein a state at a first time t can be modeled by a functional presentation of a state at a second time t−Δt that occurred before the first time t; and computing a set of data points based upon the set of time segmented recursive functional relationships using a matrix for operation in matrix algebra.

Method and apparatus for generalized recursive least-squares process for battery state of charge and state of health

A motorized vehicle capable of fault detection and of operation after a fault has been detected. The vehicle has a plurality of control components coupled to a motorized drive and a comparator for comparing the output of each of the control components with outputs of other control components so that failures may be identified. The vehicle may have multiple processors coupled to a plurality of control channels by means of a bus and a decision arrangement that suppresses the output of any processor for which a failure has been identified.

Fault tolerant architecture for a personal vehicle

The invention provides a power supply device for a vehicle, for driving a motor which is mounted on a vehicle and makes the vehicle travel. The power supply device for a vehicle includes: a battery unit having a plurality of secondary batteries; a battery temperature sensor for detecting temperature of a secondary battery included in the battery unit; a heat insulating mechanism for controlling the temperature of the secondary battery; an outside air temperature sensor for detecting the temperature of air on the outside of the vehicle; an intake port for taking the outside air to the battery unit in the vehicle; an intake valve for opening/closing the intake port; and a temperature controller for controlling opening/closing of the intake valve on the basis of the temperature difference between the outside air temperature detected by the outside air temperature sensor and the battery temperature detected by the battery temperature sensor.

Power supply device for vehicle

PURPOSE: To incorporate a larger capacity from the time of driving at the time of braking, and to dynamic brake in an operating area over a wide range by outputting a drive command for controlling the drive power of a motor at the time of driving, and outputting a generating command in an overrotating area. CONSTITUTION: When an accelerator 1 is operated to drive a motor 6, a controller 2 so forms a torque command as to generate the torque responsive to the opening of the accelerator 1 by a stored map and the number of revolutions of the motor 6 obtained from a position detector 7, and an inverter 4 rotates the motor 6 as commanded. The controller 2 outputs a brake torque command despite the opening of the accelerator 1 when the motor 6 exceeds the predetermined highest number of revolutions, generates a brake power at the motor 6 to prevent the overrotation. If the desired deceleration is not obtained only by the brake torque by the generator operation of the motor 6, the controller 2 sends a command to a mechanical brake 10 to control at the desired deceleration.

Controller for electric vehicle

A hybrid electric vehicle comprises an electric motor, a battery pack for the electric motor, a generator driven by an engine to provide electric power used for charging the battery pack, and a battery management for the battery pack. The battery management determines a current value of battery temperature (BT) of the battery pack and a current value of state of charge (SOC) within the battery pack. What are stored are a first set of varying SOC values and a second set of varying SOC values against varying BT values. The first set of varying SOC values are minimum SOC values required for the battery pack to produce a constant electric power output at varying BT values. The second set of varying SOC values are each indicative of an allowable upper limit to the quantity of electric charge that will accumulate in the battery pack due to operation of charging the battery pack with a constant electric power input at a corresponding BT value. The battery management provide an actuator command for control of electric power input upon charging the battery pack in response to the current value of BT, the current value of SOC, the first set of varying SOC values and the second set of varying SOC values.

Hybrid electric vehicle with battery management

An engine is activated to drive a generator when an electrical output is required. The required electrical output (PO) is searched and the necessary engine output is calculated. The basic driving point (NO, TO) which obtains maximum fuel efficiency is set at that output (S 101- S 105 ). The load of the generator is controlled so as to reach the set basic driving point. When the catalyst temperature is lower than a set value, while maintaining the required electrical output, the basic driving point is varied to a driving point (Ncold, Tcold) which will raise the exhaust gas temperature (S 106-108 ). Furthermore when the temperature of the peripheral engine components in the engine room is higher than a set value, while maintaining the required electrical output, the driving point is varied to a driving point (Nheat, Theat) which will lower the exhaust gas temperature (S 109- S 111 ). Hence while maintaining the electrical output, it is possible satisfy each component temperature condition. Therefore while maintaining drivability, fuel efficiency performance, lowering exhaust gas emissions and component deterioration can suppressed.

Generator control device for an electrical automobile

By calculating a fuel vapor quantity in a fuel tank based on a fuel temperature and a fuel residual quantity in the fuel tank, then calculating a fuel vapor purge quantity based on an engine revolution number and engine torque when an engine is driven, and then estimating a fuel vapor quantity captured in a vapor capturing unit based on the fuel vapor quantity and the fuel vapor purge quantity, the engine can be driven to purge the fuel vapor to the engine before the fuel vapor overflows the vapor capturing unit to thus be discharged into the air.

Method of controlling generator driving engine and system for embodying the same

PROBLEM TO BE SOLVED: To ensure electric power according to a running drive force and to maintain the performance of the motive force of a vehicle by a method, wherein a power generation operation by a prime mover and that by a generator are controlled on the basis of a charging-state detection value, on the basis of a temperature detection value and of an output characteristic and on the basis of a maximum power-generation characteristic. SOLUTION: A terminal voltage VB of a battery 5 is detected by a voltage sensor 10, and the temperature TB of the battery 5 is detected by a temperature sensor 11. A controller 1 finds the charging amount SOC of the battery 5 on the basis of the terminal voltage VB and the temperature TB of the battery 5. At this time, when it is required to limit the electric power generated, a shortage charging amount is found on the basis of the present charged amount SOC, and an engine 2 and a generator 3 are driven and controlled so as to obtain the electric power, to be generated, in which electric power according to the shortage charging amount is added to a shortage electric power with respect to a running drive force. In addition, when there in a possibility of an overcharge on the basis of the charging electric-power characteristic of the battery 5 (based on the relationship between the battery temperature TB and the charging amount SOC), the engine 2 and the generator 3 are driven and controlled, so as to obtain maximum electric power to be generated.

Idoguchi Ryuichi

Papers

Controller for electric vehicle

Hybrid electric vehicle with battery management

Generator control device for an electrical automobile

Method of controlling generator driving engine and system for embodying the same

Control apparatus for power generation of hybrid electric vehicle