Volkswagen to debut coasting with engine off, TGI tech

Volkswagen to debut coasting with engine off, TGI tech

VW 1.0 TGI dual-fuel engine

Volkswagen will be heading into the 38th Vienna Motor Symposium this year with a duo of new engines: an upgraded 1.5 litre, turbocharged TSI Evo petrol engine and a new 1.0 litre turbocharged engine which can run on either petrol or compressed natural gas.

The 1.5 litre turbocharged petrol engine which will debut in the upcoming Volkswagen Golf TSI Bluemotion will form part of a micro hybrid system, which can shut the engine off completely when the vehicle is coasting, which is possible at speeds of up to 130 km/h. Volkswagen describes this as having “hybrid-style characteristics.”

The 1.5 litre unit will be mated with the DQ200 seven-speed dual-clutch automatic gearbox, along with a lithium-ion battery added to the vehicle’s 12-volt electrical architecture for powering the vehicle’s electronics when it is coasting. Thus equipped, the system provides an improvement in fuel efficiency by up to 0.4 L/100 km, according to Volkswagen.

A Q-diode regulates the flow of current between the litihium-ion and lead-acid batteries in the car. When the internal combustion engine is restarted, it can be done so via several ways: by the starter motor, via the clutch (bump starting), or with a combination of both.

Volkswagen to debut coasting with engine off, TGI tech

VW e-Golf high-voltage battery system

Next is the 1.0 litre TGI dual-fuel engine, which produces 88 hp. When running on natural gas, the 1.0 TGI engine is particularly low on CO2 and NOx particulate emissions, according to Volkswagen. Key to the TGI engine’s efficiency is the “optimum conversion of methane in the exhaust gas.”

A lambda split process was developed in order to quicken the warming up of the catalytic converter. Under low loads, two cylinders are fired with a rich fuel mixture while one cylinder is ignited with a lean fuel mixture. Along with electric heating, the regulating function is taken up within 10 seconds of a cold start, even if the exhaust system still contains a certain amount of condensation, Volkswagen explained.

The Wolfsburg-based automaker will also be showcasing its electric vehicle architecture at the Vienna Symposium, and says its first new all-electric model will make its debut in 2020. “The all-electric architecture combines local zero-emission driving with superb long-distance mobility,” says Friedrich Eichler, head of Volkswagen powertrain development.

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Mick Chan

Open roads and closed circuits hold great allure for Mick Chan. Driving heaven to him is exercising a playful chassis on twisty paths; prizes ergonomics and involvement over gadgetry. Spent three years at a motoring newspaper and short stint with a magazine prior to joining this website.

 

Comments

  • heybadigol (Member) on Apr 28, 2017 at 2:03 pm

    Porsche has something similar or close to this if im not mistaken. Well, they are within the same group. Good to see tech from a sports/luxury car making its way to normal everyday cars.

    Like or Dislike: Thumb up 1 Thumb down 0
    • Vios Fan on Apr 28, 2017 at 4:06 pm

      No surprise la. Lexus just started to use turbo engines. So Toyota will be getting too. Maybe another 20 years later only.

      Like or Dislike: Thumb up 0 Thumb down 5
  • “1.5 litre unit will be mated with the DQ200 seven-speed dual-clutch automatic gearbox, “…yeap, recipe for disaster..this DQ200 dry clutch spell disaster!

    Like or Dislike: Thumb up 2 Thumb down 15
    • kevlar on Apr 28, 2017 at 5:15 pm

      Hey vtec, study the DQ200 system first before coming up with an unlearned conclussion. The DQ200 is an upgraded system with Kevlar discs. Five times more resistant than steel. Meaning 5 times more resistant than your Honda transmission also.

      http://www.tmg-performance.com/en/dsg7-kevlar-473.html

      Like or Dislike: Thumb up 23 Thumb down 3
  • 4545er on Apr 28, 2017 at 5:18 pm

    DQ200 again ? Run guys runnnnnnnnnnnnnnnnnn

    Like or Dislike: Thumb up 5 Thumb down 30
    • exfordsalesman on Apr 28, 2017 at 7:10 pm

      I pity VW. Because they are so big, they are always attacked by competitor salesman like 4545er and vtec

      Like or Dislike: Thumb up 0 Thumb down 0
    • Kunta Zakar Turun on Apr 29, 2017 at 3:35 pm

      People will run away from you instead. DQ200 of the newer batches are perfectly fine. Go and speak to real owners of CKD models. They will tell you their cars are completely reliable. Why spread lies? It doesn’t do any good. You should get information from the right source dude..

      Like or Dislike: Thumb up 0 Thumb down 0
      • U sure…then why most of VW owners including me have non stop juddering gearbox…clutch needs replacing every 60-70,000km??? i’m using dry clutch gearbox for my CC …

        Like or Dislike: Thumb up 1 Thumb down 0
  • Semi-Value (Member) on May 02, 2017 at 9:49 am

    engine also permanently off…typical vw

    Like or Dislike: Thumb up 0 Thumb down 0
 

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