发明名称 |
Method and apparatus for controlling a multi-mode powertrain system |
摘要 |
A method for operating a powertrain system to transfer torque among an engine, torque machines, and a driveline includes executing a search to determine a preferred engine operating point for operating the powertrain system in a transmission range in response to an output torque request. The search includes employing a candidate torque normalization ratio to determine a candidate engine torque from a normalized torque search space, and determining a candidate power cost associated with operating the powertrain system at the candidate engine torque for each of a plurality of candidate engine speeds within an input speed range and a plurality of candidate torque normalization ratios. A preferred engine speed is determined, and includes the candidate engine speed corresponding to the one of the candidate engine torques associated with a minimum of the candidate power costs. Engine operation is controlled responsive to the preferred engine speed. |
申请公布号 |
US8761988(B2) |
申请公布日期 |
2014.06.24 |
申请号 |
US201213568061 |
申请日期 |
2012.08.06 |
申请人 |
GM Global Technology Operations LLC |
发明人 |
Kim Kee Yong;Heap Anthony H.;Lado Samantha Victoria;Waldner Jeffrey J. |
分类号 |
B60K17/06 |
主分类号 |
B60K17/06 |
代理机构 |
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代理人 |
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主权项 |
1. A method for operating a powertrain system including a multi-mode transmission configured to transfer torque among an engine, torque machines, and a driveline, the method comprising:
executing a search to determine a preferred engine operating point for operating the powertrain system in a transmission range in response to an output torque request, said search comprising:
for each of a plurality of candidate engine speeds within an input speed range and each of a plurality of candidate torque normalization ratios wherein the candidate torque normalization ratios for the candidate engine speed include a normalized engine torque at 0.0 corresponding to a minimum permissible engine torque for the candidate engine speed and a normalized engine torque at 1.0 corresponding to a maximum permissible engine torque for the candidate engine speed:employing the candidate torque normalization ratio to determine a candidate engine torque from a normalized torque search space, anddetermining a candidate power cost associated with operating the powertrain system at the candidate engine torque;determining a preferred engine speed comprising the candidate engine speed corresponding to the one of the candidate engine torques associated with a minimum of the candidate power costs; and controlling engine operation responsive to the preferred engine speed.
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地址 |
Detroit MI US |