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Honda patents engine with different cylinder displacements

A basic rule of engine design states that the displacement of a cylinder is equal to the engine's total displacement divided by its cylinder count. Honda, according to a recently surfaced Japanese patent, is looking to break that rule with an engine containing cylinders of different sizes. We've done our best to translate it from patent-ese. The idea is that different-sized combustion chambers give more flexibility when any combination of cylinders are deactivated, or rested. Because the different numbers can be combined in various ways, it provides more and smaller increments than would an engine with equal-displacement cylinders. Take a 2.0-liter four-cylinder, for example. Following the golden displacement rule, each of the four cylinders has a volume of 500 cc, giving displacement increments of 500 cc when any cylinder is deactivated. But suppose instead that the four cylinders displace 300, 425, 600, and 675 cc, respectively. This would give the engine 15 available displacements instead of just four, and the spacing between each option would be far less than 500cc. As a result, those different virtual displacements would provide more adjustment between power and efficiency than a cylinder-deactivation system can on a conventional engine. Honda's patent describes cylinders with equal bore size, with the displacement from cylinder to cylinder varying based on the crank throw radius – the longer the throw, the longer the stroke and the larger the displacement of that particular combustion chamber. The patent describes how the cylinder sizes would need to be arranged to spread the load on the crankshaft and presumably limit vibration that would be introduced by the different pulse magnitudes. If we're interpreting things correctly, the largest cylinder (the one with the longest crank throw radius) sits in the middle of the bank with the smaller ones alternating on either side as they decrease in displacement. This concept is described for multi-cylinder inline and V-type engines of various sizes. The patent was filed in March of 2014 and published in January of this year. Whether or not this arrangement will reach production is of course unknown, but the advantages in terms of both efficiency and power seem promising. Related Video: News Source: Japan Patent Office via Auto Guide Green Honda Fuel Efficiency Technology patent

New Honda smart cruise control predicts other motorists' future idiocy

It's not quite "Open the pod bay doors, Hal," but we're getting there: Honda is offering a predictive cruise control system on the Exectuve Grade Honda CR-V in Europe starting this year. Advancing the capabilities of the present adaptive cruise control, the Intelligent Adaptive Cruise Control (i-ACC) will be able to foresee and automatically react to other vehicles cutting in ahead of you up to five seconds ahead of it happening. A research team developed the system after studying European driving patterns for years. The i-ACC keeps track of surrounding cars with a camera and radar, "evaluating relations between multiple vehicles" and running the data through an algorithm to figure out who's going to do what. If it detects another car about to move into your lane, the CR-V brakes softly and a dash light illuminates to let the driver know what's about to happen, then it brakes a little more firmly to keep the proper distance after the other car moves in. Honda says it works in the UK and on The Continent because it knows which side of the road you're driving on. That means it could work here, but our guess is that it will take a while for that happen, our driving patterns being a little more erratic - and that's putting it kindly - than those of our Euro brethren. There's a press release below with more information. Honda to Introduce World's First Predictive Safety Cruise Control System 08.01.2015 - Honda is to introduce the world's first predictive cruise control system known as Intelligent Adaptive Cruise Control (i-ACC), capable of foreseeing and automatically reacting to other vehicles 'cutting-in' to the equipped vehicle's lane. Based on extensive real-world research of typical European driving styles, Honda's Intelligent Adaptive Cruise Control (i-ACC) uses a camera and radar to sense the position of other vehicles on the road. It then applies an algorithm to predict the likelihood of vehicles in neighbouring lanes cutting-in by evaluating relations between multiple vehicles, enabling the equipped vehicle to react quickly, safely and comfortably. i-ACC will make its debut this year on the new European CR-V*, building upon the traditional Adaptive Cruise Control (ACC) system. Traditional ACC systems keep a preselected longitudinal velocity, which is only reduced for maintaining a safe distance to a car in front. However, if a vehicle cuts-in from a neighboring lane, the traditional ACC system reacts later thus requiring stronger braking.

Honda ready for 'late 2016' arrival of Clarity Fuel Cell in US

Two years ago at the LA Auto Show, Honda showed off the first concept for what we now know is the Clarity fuel cell vehicle. At the time, Honda said it would arrive at some point in 2015. Since then, Honda has said simply that the Clarity would arrive some time after the March 2016 on-sale date in Japan and even gave itself an out in case the debut slipped to the first half of 2017. Yesterday, at a preview event at the Honda Advanced Design Studio in downtown LA, Honda narrowed that down a bit more to, "late 2016." Honda representatives said this was all still in line with internal targets for the US launch of the car. They already know when the car will arrive here, but are not yet able to say, since things like crash tests and other homologation issues could still change the timeline. The company is happy to see the expansion in the number of hydrogen refueling stations in California and is working a number of dealers in the Los Angeles and San Francisco Bay Area to get them ready to sell the Clarity. Everything that has happened since the company officially set its internal fuel cell clock has been going to plan, Honda representatives told AutoblogGreen. Hydrogen fuel cell vehicles from Hyundai and Toyota are available now, while those from other automakers (like BMW and Nissan) may arrive in or after 2020. Honda still won't confirm, on the record, that an all-electric model will be the third vehicle to use the platform that the Clarity and the upcoming plug-in hybrid (due in 2018) use, as we suspect. But, during a casual discussion about Honda happenings, I heard one executive say that he's busy working on the follow-up "products" that will use the platform, so this remains something to keep in mind. We recently got the chance to drive the Clarity in Japan, which you can read about here.