Caitlin Duncan. Honda. October 19th , 2017.
The Odyssey V6 engine combines Variable Cylinder Management (VCM) with Variable Valve Timing and Lift Electronic Control (i-VTEC), which changes the lift profile, timing and lift duration of the intake valves. A switching mechanism allows each cylinder to operate with low-rpm valve lift and duration or high-rpm lift and duration. While operating in 3-cylinder mode, the rear cylinder bank rocker arms deactivate, closing all intake and exhaust valves to minimize pumping losses. The "intelligent" portion of the system is its ability to vary valve operation based on the driving situation and engine rpm. At low rpm, the i-VTEC intake valve timing and lift are optimized (low lift, short duration) for increased torque, which allows a wide range of 3-cylinder operation. As engine rpm builds past 5,350 rpm, the i-VTEC system transitions to a high-lift, long-duration intake cam profile for superior high-rpm engine power.
The Odyssey new engine - from the Honda EarthDreams® Technology powertrain series - is rated at 280 peak horsepower and 262 lb.-ft. peak torque. Peak engine output is up 32 horsepower and 12 pound-feet of torque from the previous model, with increased torque over the engine entire operating (rpm) range. The new, more efficient engine and transmissions, along with as much as a 75-pound reduction in vehicle weight (EX-L trim) and improved aerodynamics, among other reductions to running resistance, result in enhanced performance and fuel efficiency. With its 60-degree V-angle, the Odyssey V6 engine is inherently smooth and has compact overall dimensions that allow efficient packaging within the vehicle. The engine has a high-pressure die-cast lightweight aluminum alloy block with cast-in-place iron cylinder liners. Made with a centrifugal spin-casting process, the thin-wall liners are high in strength and low in porosity. The block incorporates a deep-skirt design with four bolts per bearing cap for rigid crankshaft support and minimized noise and vibration. The engine also uses a high-tensile strength steel crankshaft is for minimum weight.
Located behind the instrument panel, the Honda Odyssey cast magnesium steering hanger beam replaces the multi-part steel unit in the previous Odyssey. Its purpose is as a structural attachment point for the steering column and instrument panel, as well as a structural element that helps the passenger cabin retain its shape in certain collisions. For the first time, the Odyssey body structure also utilizes composite materials to further reduce weight while enhancing rigidity and noise dampening. One example is inside the C-pillars, where composite stiffeners, together with the structural foam mentioned above help improve body rigidity. Another example is the base that supports the Odyssey battery. Created from a single composite casting, it holds the battery securely while adding minimal weight to the overall body structure, saving 2.9 lbs. over the previous Odyssey.
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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