Title
Development of an active exhaust silencer: with acoustical characterization of internal combustion engines,Used
Delivery time: 8-12 business days (International)
New European directives force manufacturers of internal combustion engines to develop clean, fuel effective and silent engines. Exhaust system manufacturers have to develop new concepts of exhaust systems which comply the noise emission standards without affecting the engine efficiency adversely. An original active exhaust silencer has been developed, based on an electrically controllable valve combined with a buffer volume. The system is able to attenuate the exhaust noise without passive attenuation prior to the active silencer. There have been developed electrical equivalent models to dimension the silencer wherein the engine acoustical characteristics, such as the acoustic impedance and source strength at the exhaust, have been included. A cold engine test rig is developed which generates realistic exhaust noise using compressed air with similar characteristics as an operational engine. The test rig permits to develop new concepts of exhaust systems economically, using low cost materials and standard measurement equipment. The prototype active silencer has been validated on the cold engine test rig.
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⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, please visit www.P65Warnings.ca.gov.
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.