Engine transient mitigation for hybrid vehicles
    2.
    发明授权
    Engine transient mitigation for hybrid vehicles 有权
    混合动力汽车发动机瞬态减速

    公开(公告)号:US08285470B2

    公开(公告)日:2012-10-09

    申请号:US12915456

    申请日:2010-10-29

    IPC分类号: B60W20/00

    摘要: A method and system for limiting a fast transient in an engine in a hybrid vehicle is provided. The predicted fuel loss percentage is calculated from an inferred air-fuel ratio (inferred lambda). The rate limit term is calculated from a measured air-fuel ratio (measured lambda) and an engine torque command change rate. The predicted fuel loss percentage and the rate limit term are inputs into a calibration table to determine an engine power rate limit and an engine torque rate limit. An engine torque command is limited using the engine torque rate limit to control a fast engine torque transient for an engine. An engine power command is limited using the engine power rate limit to control the fast engine power transient for the engine.

    摘要翻译: 提供了一种用于限制混合动力车辆中的发动机中的快速瞬变的方法和系统。 从推测的空燃比(推测的λ)计算预测的燃料损失百分比。 速率限制项是根据测量的空燃比(测量λ)和​​发动机扭矩指令变化率计算的。 预测的燃料损失百分比和速率限制项是用于确定发动机功率限制和发动机转矩限制的校准表的输入。 使用发动机转矩限制来限制发动机转矩指令,以控制发动机的快速发动机转矩瞬变。 使用发动机功率限制来限制发动机功率命令,以控制发动机的快速发动机功率瞬变。

    ENGINE TRANSIENT MITIGATION FOR HYBRID VEHICLES
    7.
    发明申请
    ENGINE TRANSIENT MITIGATION FOR HYBRID VEHICLES 有权
    发动机瞬态减速混合动力车辆

    公开(公告)号:US20110166730A1

    公开(公告)日:2011-07-07

    申请号:US12915456

    申请日:2010-10-29

    摘要: A method and system for limiting a fast transient in an engine in a hybrid vehicle is provided. The predicted fuel loss percentage is calculated from an inferred air-fuel ratio (inferred lambda). The rate limit term is calculated from a measured air-fuel ratio (measured lambda) and an engine torque command change rate. The predicted fuel loss percentage and the rate limit term are inputs into a calibration table to determine an engine power rate limit and an engine torque rate limit. An engine torque command is limited using the engine torque rate limit to control a fast engine torque transient for an engine. An engine power command is limited using the engine power rate limit to control the fast engine power transient for the engine.

    摘要翻译: 提供了一种用于限制混合动力车辆中的发动机中的快速瞬变的方法和系统。 从推测的空燃比(推测的λ)计算预测的燃料损失百分比。 速率限制项是根据测量的空燃比(测量λ)和​​发动机扭矩指令变化率计算的。 预测的燃料损失百分比和速率限制项是用于确定发动机功率限制和发动机转矩限制的校准表的输入。 使用发动机转矩限制来限制发动机转矩指令,以控制发动机的快速发动机转矩瞬变。 使用发动机功率限制来限制发动机功率命令,以控制发动机的快速发动机功率瞬变。

    Method for optimizing powertrain efficiency for a vehicle
    8.
    发明授权
    Method for optimizing powertrain efficiency for a vehicle 有权
    优化车辆动力总成效率的方法

    公开(公告)号:US08103397B2

    公开(公告)日:2012-01-24

    申请号:US12797964

    申请日:2010-06-10

    IPC分类号: G05D3/00

    摘要: A vehicle powertrain includes an engine, an electric machine operable to output torque to at least one vehicle wheel, and an electric power source operable to provide electric power to the electric machine. A method for optimizing powertrain efficiency includes generating a plurality of three-dimensional maps of optimized engine speeds for combinations of vehicle power and vehicle speed at a plurality of predetermined powers of the electrical power source. Each of the maps corresponds to one of the predetermined powers of the electrical power source. The maps are used to determine an optimized engine speed for a given power of the electrical power source, a given vehicle power and a given vehicle speed.

    摘要翻译: 车辆动力总成包括发动机,可操作以将扭矩输出到至少一个车轮的电机以及可操作以向电机提供电力的电力源。 一种用于优化动力总成效率的方法包括:在电力源的多个预定功率下产生用于车辆功率和车辆速度的组合的优化的发动机速度的多个三维图。 每个地图对应于电源的预定功率之一。 这些地图用于确定给定功率的电源,给定车辆功率和给定车速的优化的发动机转速。