News Article | February 15, 2017
MOUNTAIN VIEW, Calif. and TEL AVIV, Israel, Feb. 15, 2017 /PRNewswire/ -- To expand its in-market support of Israeli startups and entrepreneurs, Honda Silicon Valley Lab (HSVL) of Honda R&D Americas, Inc. announced a partnership with DRIVE, the new smart mobility innovation center...
Ailloud C.,Danielson Engineering ID MOTION |
Delaporte B.,Danielson Engineering ID MOTION |
Schmitz G.,Jodocy and Schmitz AG |
Keromnes A.,DRIVE |
Le Moyne L.,DRIVE
SAE Technical Papers | Year: 2013
Internal combustion engine development is mainly driven by new emission regulations and fuel cost. The introduction of hybrid power trains allows the development of highly efficient non-traditional internal combustion engines. One way of increasing thermal efficiency while avoiding issues like high mechanical stress or knock, is to realize different expansion and compression strokes. Different solutions exist such as the Miller/Atkinson cycle or the five stroke engine. A 5-stroke turbo-charged port-injection spark-ignition engine has been developed in the present study for use as a range extender or series-hybrid main power source. Its development and design are based on 0D/1D model and experimental results have been compared with the engine model. The 5-stroke engine is a three-cylinder in which two cylinders, called high pressure (HP) cylinders, perform a four-stroke cycle with a volumetric compression ratio of 8:1 and alternatively a second expansion of the burnt gases is performed in the third cylinder, called low pressure (LP) cylinder with a volumetric compression ratio of 30:1, the overall expansion ratio being 12.7:1. The boost pressure delivered by the turbocharger is controlled by a particular innovative system called "smart wastegate", consisting in two differently controlled exhaust valves, one feeding the turbine, the other bypassing the latter. The engine develops 32.5 kW for an engine of 4000 rpm. BSFC is 226 g/kWh which corresponds to a global efficiency of 36.1 %. The engine parts and technology are standard and allow cost effective development of the concept as no special component with special development is needed. Moreover, the version studied consists of a multi-point port-injection system and a two valve combustion chamber. Copyright © 2013 SAE International.
News Article | November 3, 2016
The Drive section of the Globe and Mail, which calls itself Canada’s national newspaper, usually is filled with coverage of fancy cars, so it is surprising to see almost the entire section devoted to a series on autonomous vehicles. It starts with a brash statement: All of these are arguable, as is the section on elevators, where Jordan Chittley tours the Birkbeck Building, with one of the few manually controlled elevators in the City, to make the point that people didn’t like automatic elevators when they were introduced. I am not sure that the analogy works. You do not have elevators running up stairways with people having to get out of the way when the elevator cab comes. With the exception of some new elevators from ThyssenKrupp, you don’t have lots of elevators running in one shaft. And perhaps most importantly, you usually have buildings designed around elevators. This is a lot more complicated and requires a lot more trust. In another article in the series, Matt Bubbers doesn’t think that self-driving cars will be here as quickly as people are saying, and points out they were promised during the 1939 world’s fair. But here again, like the elevator analogy, it misses a big point: Bel Geddes proposed a redesign of the city to separate cars from pedestrians. That’s why I wrote about Futurama as a model for a world with self-driving cars noting: Of course the human-driven car doesn’t do a very good job avoiding kids darting out either, and often doesn’t slow down for snow or Hallowe’en. Cars, of any kind, don’t mix very well with people, which is why so many get killed and injured. Where I live in Toronto, 14 people were hit in the last 18 hours. The autonomous car cannot possibly do a worse job than the human driven car does, but is still going to be problematic. As City of Toronto Chief Planner Jennifer Keesmaat notes, cars don’t really fit well in cities at all. The authors note that the goal should be to use self-driving cars to create a better city- eliminating street parking, reducing the number of cars on the road, reducing pollution. Jennifer Keesmaat continues: “In 20 or 30 years from now, we’ll look back at this moment in history and say, ‘Wow, that was terrible, remember when people used to commute for 45 minutes each way?’” says Keesmaat. “Great cities are places where sometimes you can walk, sometimes you can cycle, sometimes you can take transit, sometimes you can take a car and, if we see autonomous vehicles as being a part of the layering to all of those movement choices, they can enhance our overall city building objectives.” Will the self-driving car change society? Will roads be safer, will our cities be reshaped? Will traffic be a thing of the past? The authors think so, but is is in the Drive section of the Globe which has its own agenda. I would love to see what the writers in the Walk and the Cycle section would say, but they don't exist. Read the series here at the Globe and Mail.
Khattab K.,Drive |
Brunet P.,Drive |
Zamilpa C.,Drive |
SAE Technical Papers | Year: 2011
This article focuses on the wireless transfer of energy. It describes the operation of a transformer without magnetic circuit associated with a resonant inverter to meet the constraints imposed by mobile sources (catenaries with magnetic induction to power electric vehicles). The receiving and transmitting units consist of an air-gap transformer and a generator who feeds the transformer. In this article, we show how to determine the transformer's parameters and configuration needed for this transfer to be efficient. The transformer is fed by a half-bridge converter for serial resonant load. The primary winding of the transformer is fixed on the ground. The secondary winding can move horizontally in a parallel plane of that of the primary. This application targets mainly the transfer of static electricity for the charging of batteries and super capacitors in electric cars and trams. Copyright © 2011 SAE International.