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Assessment of Exhaust Actuator Control at Low Ambient Temperature Conditions Ford Motor Company
- Format:
- Book
- Conference/Event
- Author/Creator:
- Dadam, Sumanth Reddy, author.
- Conference Name:
- SAE WCX Digital Summit (2021-04-13 : Live Online, Pennsylvania, United States)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2021
- Summary:
- Exhaust Sensors and actuators used in automotive applications are subjected to wide variety of operating ambient conditions , the performance of these actuators is challenging especially at cold ambient operating conditions , active exhaust tuning valves with position sensors are used to adjust the sound levels, or noise, vibration and harshness (NVH) from a control unit within the vehicle that leads to an improved driving experience wherein the driver selects their preferred sound levels . However, the operating behavior is crucially influenced by the characteristics of the Drive cycle and ambient temperature . The study in this paper is intended to evaluate the impact of drive cycle and ambient temperature on active exhaust tuning valve performance specially focused on Icing conditions . The test data were obtained through real road and Chassis Dyno testing at different ambient conditions . The results of the testing indicated that a drive cycle with low engine speed and engine load, like a typical city road and cold ambient temperatures, had a low probability of successful operation of active exhaust valves ,However Information reported from the actuator could be used along with other engine parameters to evaluate the performance of the system . In this study , an example of how the water collected in the exhaust system on Gasoline only powertrain unexpectedly impacted the exhaust valve diagnostics , causing false detections is shown. Root cause analysis is provided, and noise factors of valve freezing are also evaluated
- Notes:
- Vendor supplied data
- Publisher Number:
- 2021-01-0681
- Access Restriction:
- Restricted for use by site license
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