US 12,233,840 B2
Method and system for kinetic energy recovery in a hybrid powertrain during engine shutdown
David B. Snyder, Greenwood, IN (US); and Ming-Feng Hsieh, Nashville, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Aug. 29, 2023, as Appl. No. 18/239,610.
Application 18/239,610 is a continuation of application No. 17/677,833, filed on Feb. 22, 2022, granted, now 11,772,628.
Claims priority of provisional application 63/158,075, filed on Mar. 8, 2021.
Prior Publication US 2023/0398974 A1, Dec. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B60W 10/06 (2006.01); B60K 6/48 (2007.10); B60W 10/02 (2006.01); B60W 10/08 (2006.01)
CPC B60W 10/06 (2013.01) [B60K 6/48 (2013.01); B60W 10/026 (2013.01); B60W 10/08 (2013.01); B60W 2510/0657 (2013.01); B60W 2710/024 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A hybrid powertrain system, comprising:
an engine;
at least one motor/generator (“MG”);
a clutch coupled to the engine and the at least one MG;
a transmission coupled to the at least one MG; and
a controller operatively coupled to the engine, the at least one MG, the clutch, and the transmission, the controller including a processor and a memory including instructions that when executed by the processor, cause the controller to:
operate, in response to (1) engine torque and torque associated with the at least one MG being reduced to zero or near zero and (2) the transmission being shifted to a neutral gear, the at least one MG in a generator mode to recover kinetic energy from the engine by loading the engine through the clutch,
disengage the clutch to decouple the at least one MG from the engine,
shift the transmission into gear in response to a speed of the at least one MG reaching a target speed, and
propel a vehicle using power from the at least one MG after shifting the transmission into gear.