Archive for category Porsche hybrid

VW Touareg hybrid dyno chart showing power without boost

Below is a dyno chart showing power of the combustion engine alone and combined power with the hybrid motor on a VW Touareg hybrid.  The Porsche Cayenne hybrid S uses the same drivetrain in a slightly different body (same underlying chassis).

As you can see, power from the 3.0L supercharged engine is quite good.  Where the hybrid motor’s additional power really shines is at the low end.  This is due to the characteristic of a hybrid motor.  They provide maximum torque at 0 rpm which decreases as friction and other limitations rise with rpm.  Horsepower provided by the hybrid motor is more or less constant as rpm increases.

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First look: Porsche Panamera hybrid

The Panamera S Hybrid marks the beginning of a new chapter of Dr. Ing. h.c. F. Porsche AG, Stuttgart’s Porsche Intelligent Performance, continuing the success story of its four door Gran Turismo. Without sacrificing sportiness and elegance, the new Gran Turismo combines the total power output of 380 hp (279 kW) with best case consumption of only 6.8 l/100 km (41.54 mpg imp.) of fuel based on the NEDC. That equates to CO2 emissions of just 159 g/km. That doesn’t just make the Panamera S Hybrid the most economical Porsche of all time, it also puts it streets ahead of all the full hybrid production vehicles in its class, the luxury class, when it comes to fuel consumption and CO2 emissions. It achieves these values thanks to Michelin’s even lower rolling resistance all season tyres developed specially for the Panamera and available as an option. But even with the standard tyres, the new Porsche hybrid model’s fuel consumption is at an unprecedentedly low level in this class at 7.1 l/100 km (39.79 mpg imp.) based on the NEDC – which equates to 167 g/km CO2.

  • Gran Turismo with 380 hp (279 kW) power output and 6.8 l/100 km (41.54 mpg imp.) combined consumption based on the NEDC
  • Best in class: The new Panamera S Hybrid achieves 159 g/km CO2

The Panamera S Hybrid sets new standards, both in terms of classic performance and when measured against hybrid vehicle characteristics. The Panamera S Hybrid accelerates from a standing start to 100 km/h (62 mph) in 6.0 seconds, reaching top speed at 270 km/h (168 mph). The range in purely electric mode is approximately two kilometres (1.24 miles) with electric driving possible up to 85 km/h (53 mph), depending on the driving situation. The Porsche hybrid drive is also the only system in the world able to exploit additional consumption reserves thanks to so-called “sailing” on motorways and main roads. This entails disengaging and switching off the combustion engine at speeds of up to 165 km/h (103 mph) (Cayenne S Hybrid: 156 km/h (97 mph) during phases when no power is being delivered by the combustion engine.

The Panamera S Hybrid is driven by the same engine combination that has already proved itself in the Cayenne S Hybrid: The main propulsion is provided by a three litre V6 compressor engine delivering 333 hp (245 kW) supported by a 47 hp (34 kW) electric motor. Both machines are capable of powering the Panamera S Hybrid either alone or in combination. The electric motor also operates both as a generator and a starter. Together with the decoupler it forms the compact hybrid module located between the combustion engine and the transmission. The electric motor is connected to a nickel metal hydride battery (NiMh) where the electrical energy recovered from braking and driving is stored. Power transmission is handled by the familiar eight-speed Tiptronic S fitted as standard in the Cayenne models with a wide spread of ratios.

The range of standard equipment for the Panamera S Hybrid is even wider than that of the already extensive standard equipment of the Panamera S with eight-cylinder engine. For example, the hybrid model is fitted as standard with the adaptive air suspension including the adaptive shock-absorber system with PASM, with Servotronic and a rear wiper. The new Gran Turismo also features the Cayenne S Hybrid’s innovative display concept that provides the driver with all the relevant information about the vehicle’s specific hybrid driving status.

With the new hybrid variant, the Panamera model line now comprises six different models. This offering underlines the strategic importance of “Porsche Intelligent Performance“ and creates totally novel highlights in the luxury segment – from sporty to environmentally friendly. This chimes with what customers want, as the major market success is already confirming. Approximately 15 months after sales started, not quite 30,000 vehicles have been delivered. That means the Gran Turismo has seized a 13 percent share of the upper and luxury segment. The new model will further boost the attractiveness of Porsche’s fourth model line in the market.

The Panamera S Hybrid will come on the market in June 2011 and cost 106,185 Euros in Germany, including VAT and country-specific equipment.

The Panamera S Hybrid will celebrate its world premiere at the Geneva Motor Show in early March. The press conference will be held at the Porsche stand in hall 1, stand 1050, at 7:30 a.m. on March 1, 2011 and will be webcasted live at www.porsche.com/geneva.

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How to safely work on the VW Touareg hybrid and disconnect the battery pack

One concern of working on hybrid cars for DIY’ers is how to work around the hybrid electrical system.  It’s not only amps or only volts that is dangerous, it’s enough of the combination of enough either volts or amps that can injure you.  Comparing electricity to water, you can think of amps as the volume of water and volts as the speed that it moves.  You’re not going to get swept away in a river unless there’s enough water and it’s flowing fast enough.

Disclaimer: In addition to the regular disclaimer and Terms of Use Agreement, remember that the electrical system has more than enough juice to cause serious injury or death.  Do not work on the engine, power module, battery pack, or high voltage lines unless you are trained and qualified.  These articles are only to teach you about the systems on your car.  They do not qualify you as an automotive technician trained to work on these cars.

The electric safety line in the VW Touareg hybrid and Porsche Cayenne hybrid

The battery pack in these cars is 288 volts and more than enough amps to cause serious injury.  If it has enough energy to move a car it has enough energy to jolt you.  Therefore, take safety precautions when working on them.  There are a few safety measures:

• The electric safety line with safety connector
• The ignition lock
• The battery regulation control unit relay
• The airbag control module
• The maintenance connector

In this first post in a series, let’s look at the safety line and connector.  The safety line guarantees that the entire high voltage system’s voltage is turned off as soon as a high voltage component is disconnected from the system. Together with a locking bar, the safety connector forms a mechanical lock, which prevents the high voltage lines from being disconnected while voltage is present. The safety line is an electrical circuit that is closed by safety connectors. If this circuit is opened by removing the safety connectors, the high voltage system shuts off.

The safety connectors have to be removed before high voltage lines can be disconnected from the high voltage components. This guarantees that the system is not conducting voltage when the lines are disconnected.  It is shown below.

vw touareg hybrid safety line voltage disconnect

See part 2 here: http://www.evwaudi.com/2011/02/how-to-safely-work-vw-touareg-hybrid-disconnect-electrical-system/

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Porsche hybrid for every model planned

According to an interview with Automotive news Europe, “In the future, we will have hybrid drive in every model line.” says Porsche development chief  Wolfgang Duerheimer.  The challenge is meeting CO2 emissions limits per manufacturer.  Makes like VW or Chevy can sell base economy models or diesel options which lower their CO2 emissions but Porsche makes sports cars.

They are not designed to have higher mpg and lower CO2 emissions but that doesn’t mean that a sports car can’t.  Lower weight will improve handling, acceleration, tire grip, and fuel economy.  For those who can’t see a diesel Porsche 911, this means hybrid drive.

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