Hybrid commercial vehicle thermal management using dynamic heat generator

Abstract

A system and method are provided for hybrid electric internal combustion engine applications in which a motor-generator, a narrow switchable coupling and a torque transfer unit therebetween are arranged and positioned in the constrained environment at the front of an engine in applications such as commercial vehicles, off-road vehicles and stationary engine installations. The motor-generator is preferably positioned laterally offset from the switchable coupling, which is co-axially-arranged with the front end of the engine crankshaft. The switchable coupling is an integated unit in which a crankshaft vibration damper, an engine accessory drive pulley and a disengageable clutch overlap such that the axial depth of the clutch-pulley-damper unit is nearly the same as a conventional belt drivepulley and engine damper. The front end motor-generator system includes an electrical energy store that receives electrical energy generated by the motor-generator when the coupling is engaged. Whenthe coupling is disengaged, the motor-generator may drive the pulley portion of the clutch-pulley-damper to drive the engine accessories using energy returned from the energy store, independent of theengine crankshaft.

Description

[0001] This application is a continuation-in-part of US Application Serial No. 15 / 378,139 filed 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 selective coupling of 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 having an internal combustion engine combined with a motor-generator and an electrical energy storage system have become the focus of considerable interest in the automotive field, especially in the passenger car field. 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, earth moving equipment and railroad...

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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