Invention Grant
- Patent Title: Control of engine exhaust braking
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Application No.: US14695656Application Date: 2015-04-24
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Publication No.: US09644545B2Publication Date: 2017-05-09
- Inventor: Chad E. Marlett , Luca Scavone , Francesco Cianflone
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn IP Law
- Main IPC: F02D9/06
- IPC: F02D9/06 ; F02D9/04 ; F02D9/08 ; F02B37/24

Abstract:
A method of controlling exhaust braking in an internal combustion engine is disclosed. The engine includes an exhaust system, an exhaust pressure modulation valve, and a variable geometry turbocharger having adjustable vanes. The method includes restricting a flow of the exhaust gas through the exhaust system via a first partially-closed position of the valve. The valve's first partially-closed position increases the exhaust backpressure in the engine up to a first pressure value and generates a first stage of exhaust braking by the engine. The method also includes, following the increase of exhaust backpressure in the engine up to the first pressure value, restricting a flow of the exhaust gas through the turbocharger via closing the turbocharger's adjustable vanes. The closing of the turbocharger's adjustable vanes increases the exhaust backpressure up to a second pressure value in the exhaust system and generates a second stage of exhaust braking by the engine.
Public/Granted literature
- US20160312712A1 CONTROL OF ENGINE EXHAUST BRAKING Public/Granted day:2016-10-27
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