Hybrid vehicle thermal management using a bypass path in a catalytic converter unit

A hybrid vehicle and catalytic converter technology is applied in the arrangement of multiple different prime movers of hybrid vehicles, motor vehicles, and general power plants to achieve the effect of maintaining thermal efficiency

Inactive Publication Date: 2012-08-15
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since both the electric machine and the internal combustion engine are coupled to the transmission to provide drive torque to the transmission, the electric machine can cause the internal combustion engine to spin when the electric machine is engaged to provide drive torque

Method used

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  • Hybrid vehicle thermal management using a bypass path in a catalytic converter unit
  • Hybrid vehicle thermal management using a bypass path in a catalytic converter unit
  • Hybrid vehicle thermal management using a bypass path in a catalytic converter unit

Examples

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Embodiment Construction

[0012] With reference to the drawings, where the same reference numerals in multiple views indicate the same parts, the hybrid vehicle figure 1 Is shown generally at 20. reference figure 1 , The hybrid vehicle 20 includes a transmission 22. The transmission 22 is configured to receive drive torque and transmit the drive torque to drive wheels (not shown). The transmission 22 may include, but is not limited to, an automatic transmission 22. The transmission 22 receives driving torque from the internal combustion engine 24 and / or the electric motor 26. The internal combustion engine 24 and the electric motor 26 are both coupled to the transmission 22 and are configured to selectively provide driving torque to the transmission 22. The internal combustion engine 24 may include, but is not limited to, a gasoline engine or a diesel engine, and may include any suitable size and / or configuration suitable for meeting the output and performance requirements of the hybrid vehicle 20. T...

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PUM

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Abstract

A hybrid vehicle includes an exhaust gas treatment system having a bypass valve for directing a flow of air or exhaust gas through a bypass path or through a primary catalyst. The hybrid vehicle includes an internal combustion engine and an electric motor, each selectively engageable with a transmission to provide a drive torque. The electric motor spins the internal combustion engine when engaged to provide the drive torque, thereby creating a flow of unheated air from the internal combustion engine that flows through the exhaust gas treatment system. The bypass valve directs the flow of air through the bypass path when the engine is spinning and not fueled to prevent cooling of the primary catalyst. The bypass valve directs the flow of exhaust gas through the primary catalyst when the internal combustion engine is spinning and is being fueled, i.e., running, to treat the flow of exhaust gas.

Description

Technical field [0001] The present invention generally relates to a hybrid vehicle and a method of operating the hybrid vehicle to maintain the thermal efficiency of a catalyst for an exhaust gas treatment system of the internal combustion engine when the internal combustion engine is rotating. Background technique [0002] Hybrid vehicles with internal combustion engines (ICE) include exhaust gas treatment systems to reduce the toxicity of exhaust gas from the engine. The treatment system generally includes a catalytic converter unit, which includes a catalyst that reduces nitrogen oxides in exhaust gas to nitrogen and carbon dioxide or water, and oxidizes carbon monoxide (CO) and hydrocarbons (HCs) to carbon dioxide and water. The catalyst may include, but is not limited to, platinum group metals (PGM). Before the catalyst becomes operational, the main catalyst must be heated to the catalyst's light-off temperature. Therefore, the exhaust gas must heat the catalyst to the lig...

Claims

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Application Information

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IPC IPC(8): F01N9/00
CPCB60K6/48B60W10/06B60W10/08F01N3/0878Y02T10/12Y02T10/62
Inventor E.V.冈泽B.N.鲁斯H.G.桑托索B.L.斯庞
Owner GM GLOBAL TECH OPERATIONS LLC
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