Shannon Griffin. Honda. October 19th , 2017.
To provide extra sound insulation by blocking off hollow pillars, acoustic spray foam is applied in 14 locations in the Odyssey body for the first time in Honda history. The areas include the base of the A-, B-, C- and D-pillars, as well as the base of the windshield frame and at the top of the C- and D-pillars. In addition, acoustic tape is applied at base of the A-, B- and C-pillars, and a foam stopper is applied to the bottom of the B-pillar. Altogether, the use of these body sealing techniques results in a 55-percent reduction in body leaks, which significantly reduces noise entering the cabin in critical sections. All foam and acoustic tape application is done while the unit-body is in its just manufactured "body-in-white" form - before attachment of key components and assemblies.
A cooling control spacer positioned in the water jacket surrounding the cylinders helps control warm-up and operating cylinder liner temperatures to reduce friction. Plateau honing of the cylinder lining further reduces friction between the piston skirts and the cylinder walls by creating an ultra-smooth surface. This 2-stage machining process uses two grinding processes instead of the more conventional single-stage honing process. Plateau honing also enhances the long-term wear characteristics of the engine. Designed with "cavity-shaped" crowns, the 2018 Odyssey pistons help maintain stable combustion and contribute to stratified-charge combustion. Ion-plated piston rings help reduce friction for greater operating efficiency. Heavy-duty steel connecting rods are forged in one piece and then "crack separated" to create a lighter and stronger rod with an optimally fitted bearing cap.
For the first time, the new 2018 Odyssey has 1500-megapascal (MPa) ultra-high-strength steel door reinforcement beams and ultra-high-strength front door outer stiffener rings made of 1500-MPa hot-stamped steel. Laser welded and significantly stronger than ordinary steel, the ultra-high-strength steel reinforcements are designed to help better protect occupants in a frontal or side impact. Their increased strength allows the components to be made lighter which also helps reduce overall vehicle weight for improved fuel efficiency.
The 2018 Honda Odyssey 3.5-liter V6 engine meets the tough EPA Interim Tier 3/Bin 125 and CARB LEV3/ULEV-125 emissions standards, and is certified to this level of emissions performance for 150,000 miles. Numerous advanced technologies are factors in the emissions performance. The unique cylinder head-mounted close-coupled catalytic converters light off quickly after engine start up, and a 32-bit RISC microprocessor within the Electronic Control Unit (ECU) boosts computing power to improve the precision of spark and fuel delivery. The engine features Programmed Fuel Injection (PGM-FI) that continually adjusts the fuel delivery to yield the best combination of power, low fuel consumption and low emissions. Multiple sensors constantly monitor critical engine operating parameters such as intake air temperature, ambient air pressure, throttle position, intake airflow volume, intake manifold pressure, coolant temperature, exhaust-to-air ratios, as well as the position of the crankshaft and the camshafts.
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