公开(公告)号：US20160376980A1

公开(公告)日：2016-12-29

申请号：US14751673

申请日：2015-06-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Hung-Yih Isaac Du ,  Jun Zhou ,  Russell P. Durrett

IPC: F02B41/06 ,  F01B9/02 ,  F16F15/26 ,  F02B75/18

Abstract: A single-shaft dual expansion internal combustion engine includes an engine block, a cylinder head and a crankshaft. First and second power pistons are moveable in first and second power cylinders and are connected to first and second crankpins of the crankshaft. An expander piston is moveable in an expander cylinder and is connected via a multi-link connecting rod assembly to a third crankpin of the crankshaft. A first balance shaft is arranged in a first longitudinal opening in the engine block, and a second balance shaft is arranged in a second longitudinal opening in the engine block. The first and second balance shafts have first and second counterweight portions, respectively, and the crankshaft has a third counterweight portion causing an imbalance in the crankshaft.

Abstract translation: 单轴双膨胀内燃机包括发动机缸体，气缸盖和曲轴。 第一和第二动力活塞可在第一和第二动力缸中移动并且连接到曲轴的第一和第二曲柄销。 膨胀活塞可在膨胀缸中移动，并通过多连杆连杆组件连接到曲轴的第三曲柄销。 第一平衡轴布置在发动机缸体中的第一纵向开口中，并且第二平衡轴布置在发动机缸体中的第二纵向开口中。 第一和第二平衡轴分别具有第一和第二配重部分，并且曲轴具有引起曲轴不平衡的第三配重部分。

公开(公告)号：US10590841B2

公开(公告)日：2020-03-17

申请号：US14751673

申请日：2015-06-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Hung-Yih Isaac Du ,  Jun Zhou ,  Russell P. Durrett

IPC: F02B41/06 ,  F16F15/26 ,  F02B75/04 ,  F01B9/02

Abstract: A single-shaft dual expansion internal combustion engine includes an engine block, a cylinder head and a crankshaft. First and second power pistons are moveable in first and second power cylinders and are connected to first and second crankpins of the crankshaft. An expander piston is moveable in an expander cylinder and is connected via a multi-link connecting rod assembly to a third crankpin of the crankshaft. A first balance shaft is arranged in a first longitudinal opening in the engine block, and a second balance shaft is arranged in a second longitudinal opening in the engine block. The first and second balance shafts have first and second counterweight portions, respectively, and the crankshaft has a third counterweight portion causing an imbalance in the crankshaft.