Thermal management of hybrid commercial vehicles using a dynamic heat generator

Abstract

A system and method are provided for hybrid electric internal combustion engine applications in which, in applications such as commercial vehicles, off-highway vehicles, and stationary engine mounts, a motor-generator, narrow switchable coupling, and The torque transfer unit is arranged and positioned in a constrained environment at the front of the engine. Preferably, the motor-generator is positioned laterally offset from the switchable coupling arranged coaxially with the front end of the engine crankshaft. The switchable coupling is an integrated unit of crankshaft shock damper, engine accessory drive pulley and disengageable clutch overlap such that the clutch-pulley-damper unit has the same axial depth as a conventional belt drive pulley and engine damper almost the same. The front end motor generator system includes an electrical energy storage portion that receives electrical energy generated by the motor generator when the coupling portion is engaged. When the coupling is disengaged, the motor generator can use the energy returned from the energy storage to drive the pulley portion of the clutch-pulley-damper to drive the engine accessories, independent of the engine crankshaft.

Description

[0001] This application is a continuation-in-part of US Application Serial No. 15 / 378,139, filed on December 14, 2016, the entire disclosure of which is expressly incorporated herein by reference. technical field [0002] The present invention relates to a hybrid electric vehicle and, in particular, to a system for selectively coupling a hybrid power generation and storage system with an internal combustion engine. The invention further relates to a method of operating the system. Background technique [0003] Hybrid electric vehicles with internal combustion engines combined with motor generators and electrical energy storage systems have become the focus of considerable attention in the automotive sector, especially in the passenger car sector. The development of hybrid electric vehicle systems has only recently begun to generate significant interest in commercial and off-highway vehicles such as trucks and buses in vehicle classes 2-8, earthmoving equipment and railroad a...

AI Technical Summary

Problems solved by technology

[0010] The present invention addresses these and other problems by providing a hybrid electric vehicle system that is positioned at the front end of the engine with the motor generator arranged in a manner that requires little or no lengthening of the front of the vehicle

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