Honda announces next generation motorcycle engine with outstanding fuel economy and useability
Honda has developed a highly fuel-efficient, very torquey 700cc twin cylinder engine with a second-generation Dual Clutch Transmission which will be showcased in the EICMA 2011 International Motorcycle Exhibition in November in Milan, Italy.
For motorcyclists, the 700-twin engine will be an interesting new alternative as the engine reportedly delivers powerful torque in the low- to mid-speed range, something that makes riding a joy around town, and something that is much rarer than it should be with modern motorcycles. Over the last forty years, motorcycle magazines have concentrated on horsepower and lap times, which are largely immaterial for machines not at the sporting edge.
The engine is also described in the press releases as having a "pleasant throbbing feel" and that the overall package has reduced vibration. The properties of the engine have been achieved by the combination of half a dozen technologies, beginning with Honda's PGM-FI electronic fuel injection system, a 270 degree offset crankshaft, and a uni-axial primary balancer.
The engine uses branch intake ports inside the cylinder head so there is only one intake channel for both cylinders. It is designed to create deliberate interference between the intake processes of the two cylinders, and the rest of the engine is designed to use this to give it the above-mentioned engine character which sounds like it might be something special. Apart from varying the combustion timing in each cylinder, there are also changes to the valve timing between the two in-line cylinders. In deciding this was necessary, Honda then used one camshaft deliver two timing routines for the intake valve.
Through these measures, "subtle combustion changes can be generated" to give the engine the aforementioned "delightful, pulsating feel". So it would appear that Honda is purposefully building "character" into its new 700, just as BMW and Husqvarna have done with the Rotax 800 parallel twin, and is evident on all motorcycles usually related to the architecture of the motor - just as Harley and Ducati have found in different ways with the V-twin design
Its design offers the best protection against the elements, the most carrying capacity, remarkable performance and better fuel economy than anything that would come close to it in a straight line.
For motorcyclists, the 700-twin engine will be an interesting new alternative as the engine reportedly delivers powerful torque in the low- to mid-speed range, something that makes riding a joy around town, and something that is much rarer than it should be with modern motorcycles. Over the last forty years, motorcycle magazines have concentrated on horsepower and lap times, which are largely immaterial for machines not at the sporting edge.
The engine is also described in the press releases as having a "pleasant throbbing feel" and that the overall package has reduced vibration. The properties of the engine have been achieved by the combination of half a dozen technologies, beginning with Honda's PGM-FI electronic fuel injection system, a 270 degree offset crankshaft, and a uni-axial primary balancer.
The engine uses branch intake ports inside the cylinder head so there is only one intake channel for both cylinders. It is designed to create deliberate interference between the intake processes of the two cylinders, and the rest of the engine is designed to use this to give it the above-mentioned engine character which sounds like it might be something special. Apart from varying the combustion timing in each cylinder, there are also changes to the valve timing between the two in-line cylinders. In deciding this was necessary, Honda then used one camshaft deliver two timing routines for the intake valve.
Through these measures, "subtle combustion changes can be generated" to give the engine the aforementioned "delightful, pulsating feel". So it would appear that Honda is purposefully building "character" into its new 700, just as BMW and Husqvarna have done with the Rotax 800 parallel twin, and is evident on all motorcycles usually related to the architecture of the motor - just as Harley and Ducati have found in different ways with the V-twin design
Its design offers the best protection against the elements, the most carrying capacity, remarkable performance and better fuel economy than anything that would come close to it in a straight line.
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