A lightweight hybrid is generally an internal combustion engine equipped with an electric engine (one motor/generator in a parallel hybrid configuration) that allows the engine to shut down every time the car accelerates, brakes, or stops, but starts again immediately. The lightweight hybrids can use regenerative brakes and some power levels help for internal combustion engines (ICE), but the lightweight hybrids do not have proprietary proprietary electric-only modes.
Video Mild hybrid
Overview
Electric motors provide greater efficiency by replacing starters and alternators with a single device that helps the powertrain. The lightweight hybrid does not require the same battery level and does not achieve the same level of fuel economy improvement as compared to the full hybrid model. One example is the 2005-07 Chevrolet Silverado, the Parallel Hybrid Truck (PHT) of a full-size pickup truck with a 3 kW single phase electric motor mounted in-house bells between the engine and conventional 4L60E transmission. Chevrolet is able to get a 10% increase in Silverado city fuel efficiency by turning off and reviving the engine on demand, and reducing the burden of parasitic accessory. However, IPM does not have power assist features or all-electric "electric vehicle" (EV) capabilities, and very limited regenerative braking features.
Maps Mild hybrid
Advantages and disadvantages
Compared to full hybrid vehicles, however, lighter hybrids can provide several benefits from applying hybrid technology, with less of the heavy-cost penalty incurred by installing a full hybrid parallel series drivetrain. Fuel savings will generally be lower than expected with full hybrid designs, since the design does not facilitate high level regenerative braking or always promote the use of smaller, lighter, more efficient internal combustion engines. BMW, however, succeeded in incorporating regenerative braking with a "start-stop system", which is not a lightweight hybrid system, as it does not help the combustion engines in their current 1-series models.
Example
General Motors
General Motors lightweight hybrids include Parallel Hybrid Truck (PHT) and many cars and SUVs equipped with the BAS Hybrid system, often using a 36 to 48 volt system to supply power needed for the startup motor, as well as a power source to offset the increasing number of electronic accessories on the vehicle modern. The lightweight GM belt hybrid (BAS) hybrid system uses a driving belt to start the internal combustion engine (ICE) through the motor-generator unit (MGU), then after starting the engine to drive the 14.5 kW generator motor to charge the battery. The BAS hybrid system also uses regenerative braking to recharge the 36 V battery system and can provide moderate power assist levels. According to the EPA, the Saturn Vue Greenline 2009 equipped with the BAS Hybrid system provides a 27% improvement in combined fuel economy over the non-hybrid version (FWD 4cyl).
Honda
Honda's Integrated Motor Assist directly attaches a brushless DC motor between the flywheel and transaxle, providing both assist during acceleration, and regeneration during sliding/braking. It has been manufactured in various voltages and power outputs, as determined by the size and weight of vehicle applications. Models equipped with Integrated Motor Assist include Honda Insight (1999-2006, 2009-), Honda Jazz (2011-) Honda Civic (2003-), Honda Accord (2005-2007), and CR-Z (2010-).
More
During the 2008 Olympics in Beijing in August, Chinese carmaker Chang'an Motors supplies a number of hybrid cars as taxis for athletes and spectators. Electron power for "lightweight hybrid" drives is supplied by Infineon.
Toyota sells the lightweight Toyota Crown luxury hybrid version starting in 2002 just for the Japanese domestic market. The fuel economy increases when compared to the standard 6 straight 6-gasoline unit. Toyota now sells a full hybrid with an electric motor for the new Toyota Crown 2008 under the brand name Hybrid Synergy Drive.
MINI and BMW have started and stopped, and some with regenerative braking, in all their vehicles sold in Europe running 4-cylinder engine with manual transmission.
CitroÃÆ'Â nn proposes a stop system and starts on its C2 and C3 models. The C5 Airscape car concept has a better version of it, adding braking capability and regenerative traction assistance, and ultracapacitors for energy buffers.
VW brings two lightweight hybrid concept cars to Shanghai for Challenge Bibendum.
Suzuki has announced Suzuki Baleno with integrated SHVS technology in 2016 on a new car platform. Suzuki has had experience with this light-hybrid technology in their Suzuki Ciaz.
List of brands and models
- Chevrolet Silverado Hybrid (2005-2007)
- Saturn Vue Green Line (BAS Hybrid, 2007-2009)
- Saturn Aura Green Line (BAS Hybrid 2007-2009 model)
- Chevrolet Malibu (model BAS Hybrid 2008-2010)
- Mercedes-Benz S400 BlueHybrid
- BMW ActiveHybrid 7
- Peugeot 308 e-HDi (from 2011, referred to by the manufacturer as a micro-hybrid)
- Buick LaCrosse with eAssist (2012 -)
- Buick Regal with eAssist (2012 -)
- Buick Regal (2013 all trim in North America)
- Ferrari LaFerrari (2013 -)
- Chevrolet Malibu w/eAssist (2014 -)
- Chevrolet Impala (eAssist version 2014; arrives in Q4 2013)
- Honda Hybrids with Integrated Motor Assist
- Maruti Suzuki Ciaz w/SHVS (2015 -)
- Maruti Suzuki Ertiga with SHVS (2015 -)
- Suzuki Baleno with SHVS (2016 -)
- Audi A8 (2017-), Audi A6 (2018 -)
See also
- Hybrid BAS (eAssist)
- Integrated Motor Assist
- Micro HEV
References
Source of the article : Wikipedia
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