Hybrid cars for Commonwealth Games

  

The HinduMinister of Transport for NCT Delhi Arvinder Singh Lovely takes a ride in a hybrid car with Maruti Suzuki India, Managing Director and CEO Shinzo Nakanishi during the handing over of first lot of Two Maruti Suzuki SX4 'Hybrid cars' and One 'Eeco Charge' to Delhi Government, in New Delhi on Tuesday. Photo: Shanker Chakravarty

Maruti Suzuki on Tuesday handed over first lot of hybrid cars — two Maruti Suzuki SX4 Hybrid and one ‘Eeco Charge’ — for use during the Commonwealth Games, while another lot of eco-friendly cars will be handed over to the Delhi Government soon.

Maruti Suzuki has made ready a lot of 14 future technology vehicles for use at the Commonwealth Games. These include 10 Maruti Suzuki SX4 Hybrid Cars and 4 Maruti Suzuki ‘Eeco Charge’ vehicles.

“I am happy that engineers at Maruti Suzuki have developed these future technology vehicles. This project has helped our engineers to increase their knowledge and enhance their research and design capability. We are grateful to the government for their leadership to promote green technology in automobiles. We are happy to be associated with the Commonwealth Games national initiative, through these vehicles,” said Maruti Suzuki India Limited Managing Director and CEO Shinzo Nakanishi.

The demonstration of the fleet of SX4 Hybrids and ‘Eeco Charge’ vehicles at the Commonwealth Games is in line with the ambitious the National Hybrid Propulsion Programme (NHPP) and High Energy Density Battery Development Programme. The development of hybrid and electric vehicles is one of the exciting initiatives undertaken by Maruti Suzuki to enhance its R&D capabilities and gear itself for greener technologies, he said.

The hybrid system used in the SX4 features an electric motor and twin clutch arrangement with advance Lithium-ion battery technology. This concept combines a 1.2 litre K-series petrol engine and a 50 kW electric motor along with 5-speed automated manual transmission.

The SX4 hybrid offers 25 per cent more fuel efficiency compared to conventional gasoline vehicle. Similarly, ‘Eeco Charge’ is a zero-emission, pure electric vehicle. It is powered by a 50kW motor and a 24kWh Lithium-ion battery. On full charge it promises a driving range of around 100 km and attains top speed of 100 km per hour.

Why Our Chassis Looks The Way It Does

Any good chassis must do several things: Be structurally sound in every way over the expected life of the vehicle and beyond.  This means nothing will ever break under normal conditions. Maintain the suspension mounting locations so that handling is safe and consistent under high cornering and bump loads. Support the body panels and other passenger components so that everything feels solid and has a long, reliable life.. Protect the occupants from external intrusion. In the real world, few chassis designs will not meet the criteria of #1.  Major structural failures, even in kit cars, are rare.  (Here's an exception.)  Most kit designers, even if they're not engineers, will overbuild naturally.  The penalties for being wrong here are too great.  The trouble is, some think that having a "strong" (no structural failures) chassis is enough. It isn't.  Read this article from the July 1999 Machine Design magazine! Structural stiffness is the basis of what you feel at the seat of your pants.  It defines how a car handles, body integrity, and the overall feel of the car.  Chassis stiffness is what separates a great car to drive from what is merely OK.   Contrary to some pronouncements, there is no such thing as a chassis that doesn't flex, but some are much stiffer than others.  The range of chassis stiffness has varied greatly over the years from about 500 lbft/degree in a Morgan to more than 20,000 lbft/deg in a modern race car.  The ERA 427's chassis runs about 3500 lbft/degree.  Not high by current sedan standards but about as high as you can get in a roadster whose body sits mostly on top of the chassis. Different basic chassis designs each have their own strengths and weaknesses.  Every chassis is a compromise between weight, component size, complexity, vehicle intent, and ultimate cost.  And even within a basic design method, strength and stiffness can vary significantly, depending on the details.  There is no such thing as the ultimate method of construction for every car, because each car presents a different set of problems.  Below, I have summarized the characteristics of some chassis alternatives.  Remember, though, that detail execution is as important as the basic design, if not more! Some think an aluminum chassis is the path to the lightest design, but this is not necessarily true.  Aluminum is more flexible than steel.  In fact, the ratio of stiffness to weight is almost identical to steel, so an aluminum chassis must weigh the same as a steel one to achieve the same stiffness.  Aluminum has an advantage only where there are very thin sections where buckling is possible - but that's not generally the case with tubing - only very thin sheet.  And even then, aircraft use honeycomb'd aluminum to prevent buckling.  In addition, an aircraft's limitation is not stiffness, but resistance to failure.

Backbone: The tunnel becomes a primary load bearing member. This is a potentially fine design, and if we were building a new car from scratch, we would seriously consider a backbone.  But , this is not a new car, it's a replica of a classic! Because it is designed around the original Ford engines (and we wanted our customers to have several different transmission choices), the bulk of a compatible structural tunnel was unacceptable, especially considering the passenger compartmentwas a fairly narrow one to begin with. A backbone would make itimpossible to maintain the look of the original interior and engine compartment.  It would also create servicing difficulties. A variation to the sheet metal backbone is one that uses small tubes to create the central structure.  TVR's Griffith was built like that - with an enormous tunnel.  The Shelby Daytona Coupe added a tubular backbone to the original 289 chassis. It probably added 50% to the overall stiffness of the car!  See below.  Then there is the issue of engine compartment esthetics.  With our rectangular tube chassis, we can duplicate the round-tube X(with the 427SC) or the spring tower (with the 289FIA) at the front of the engine to maintain visual accuracy.

Space frame: A true space frame has small tubes that are only in tension or compression - and has no bending or twisting loads in those tubes. That means that each load-bearing point must be supported in three dimensions.  It is nearly impossible to build an efficient space frame around the Cobra body. The rockers are simply too shallow, and the tunnel shaped incorrectly to make a reasonably triangulated structure. Remember the 300SLR Mercedes? (shown at the right)  It had rockers 12 inches tall and 10 inches wide and the chassis used hundreds of separate tubes. It was difficult to build and a nightmare to fix. The "space frame" chassis that is currently built for another replica simply uses smaller tubes, many carrying bending and torsional loads.  It may look impressive, but functionally it's a bad compromise.  Simply more complication without improvement.

Mercedes 300SLR Consider - the bending stiffness of a tube increases the by the square of the diameter of the (equal-wall-thickness) tube, and the torsional stiffness by the cube of the diameter, while the weight goes up linearly.  The bottom line is - sometimes you're better off with a large tube.

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1958 Lotus Elite

Monocoque:  An airplane (with a stressed outside skin) is close to a true monocoque.  In the automotive world, it's time to compromise again, but the street car that compromises the least is probably the 1958 Lotus Elite.  The design was  made possible by the use of large fiberglass panels - otherwise the tooling and construction costs would have been tremendous. In the real world, the interior panels are stressed, but many cars have an aerodynamic facade of 'glass or aluminum. The original GT40 - and our ERA GT - have a semi-monocoque chassis.  The heaviest (steel) main panel on our ERA GT is only .045" thick, and most panels are only .032"!  Reinforcements are required at the suspension points where there are local high loads.  With the rockers 10" high x 9" wide, the net result is an incredibly stiff structure.  But you can't build a classic roadster like this. ERA GT Chassis

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"Ladder" frame:  The ladder frame is a shorthand description of a twin-rail chassis, typically made from round or rectangular tubing or channel.  It can use straight or curved members, connected by two or more crossmembers.  Body mounts are usually integral outriggers from the main rails, and suspension points can be well or poorly integrated into the basic design.  The original Shelby 289 Cobra used 3" round tubes, a very flexible design that worked with stiff transverse-leaf springs for adequate but primative handling.  The 427 was updated to 4" round tubes to allow the more modern suspension to  work properly.  Both chassis were very simple to build - and good enough for their time.	An Original 289 chassis
The Semi-Backbone The Shelby Daytona used a modified 289 chassis made into a tubular semi-backbone design to correct the extreme flex of the original design.  You can see how it looks by visiting the site of someone ambitious enough to try to build a Daytona from scratch!	Daytona Chassis
The ERA chassis uses 4" x 3" x .125"W structural tubing in a complex design meant to take suspension and body loads efficiently, while maintaining the original look from outside and in the engine compartment, simutaneously allowing easy service and assembly. Roll bar, body and door mounting points are built into the basic design for maximum efficiency.  There are 4 crossmembers plus an "X" member for maximum torsional stiffness.  We even box in the "X" for extra strength! Yes - this chassis is somewhat heavier than most ladder designs, but it is also by far the stiffest.  A compromise that no ERA owner regrets!	ERA Chassis (FIA similar)

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Round vs. Rectangular frame rails: There has been a lot tossed around regarding whose chassis - and what kind of tubing - is "strongest."  Factory Five is numerically the biggest exponent of round tubes, but many others have preceded them.  We chose to use rectangular tubing in our chassis for several reasons: Under pure vertical bending load, 4" x 3" rectangular tubing is about 37% stiffer than an equal wall thickness 4" round tube. This is especially important because a roadster doesn't have a roof to stiffen the passenger compartment. Not only can you feel a lack of "solidness" with a flexible chassis.  Your variable door gaps will also make latching unstable - and even ocassionally cause paint chipping as the doors meet the main body! You can see below that transverse members have little effect on beam stiffness.  You just add up the individual stiffnesses of the components.  We also have an "X" member, acting as an additional longitudinal beam reinforcement and as two transverse members.  A round tube chassis is extremely difficult to "X" brace.

A little light on Torsional Stiffness Even though an individual rectangular tube is about 2% less stiff in torsion than the equivalent round tube, we must consider the chassis design as a whole. For eachtransverse tie-in we create a system that becomes more like a single large tube spanning the whole width of the chassis- the ultimate in efficiency. We have integrated 7 transverse members along our main rails in such a way that the chassis has much more torsional stiffness than the tubes taken individually.  We even put extra braces on our central "X" member to make it even stronger.

The stiffness of an ideal unitized structure is proportional to the square of the distance of the components from the centerline. Double the distance and you have four times the overall stiffness. While practical automotive considerations eliminate an ideal connection between the rails, widely spaced tubes that are tied together well work more efficiently than the same tubes on a narrower base. The original 427 Cobras' rails were only 20 inches apart. Ours are spaced at 27 inches on center through the middle of the chassis, one of the widest spacing in the industry. And we still are one of the few in the industry that have left room for an undercar exhaust outside the rails.

Most Fuel Efficient Cars

Price of Addiction $4,411,383,368,847.96 to Foreign Oil

At one time in the summer of 2008, gas prices average around $4.50/gallon in the U.S. It is currently lower now due to the recession, but economics predict that it will be over $4.00/gallon when the economy start picking up again. The best ways to save money is not drive at all and just stay home, sit in front of your computer all day long! Most of us can't do that because we must drive to work and we live in a society where driving is a necessity. How many miles are you getting from a gallon of gas? There will be no expensive cars in this post and none of the cars here will reach 0-60 in 5 secs, but these cars will save you money on gas every year.

Best Gas Mileage Cars - Top 10 List:

1. Toyota Prius: 48 City/45 Hwy, Base Price: $21,100. 1.5-liter, 16-Valve VVT-i 4-Cylinder engine with 110 hp, 0-60 in 9.8 secs. The most fuel efficient car on the market is the Toyota Prius, also the most demanding car in the U.S. Most dealers will charge you an extra $2000 for this car because it is rare and Toyota just doesn’t make enough of it yet. A small sedan, but roomy enough for 5 and it is perfect for those that drive over 100 miles a day to work.

2. Honda Civic Hybrid: 40 City/45 Hwy, Base Price: $22,600. 1.3-liter, 8-Valve, SOHC, i-VTEC® 4-Cylinder engine with 110 hp, 0-60 in 11.3 secs. Second on the list is a Honda Civic Hybrid, perfect for those Honda's fans that hate the Toyota Prius. 5 seats sedan with an electric motors, allowing you to save money on gasoline.

3. Smart for Two: 33 City/41 Hwy, Base Price: $11,590. 1.0-liter 3-cylinder runs on high-priced premium fuel with only 70 hp. Small, affordable 2-seat car that has a small engine, capable of saving you a lot of money.

4. Volkswagen Jetta TDI: 29 City/40 Hwy, Base Price: $20,000. 2.0-liter, 4-Cylinder diesel engine with 140 hp. Run on clean diesel and it is expected to hit the U.S. market by August 2008; the 2009 VW Jetta TDI actual performances may vary.

5. Nissan Altima Hybrid: 35 City/33 Hwy, Base Price: $25,170. 2.5-liter, 4-cylinder gas engine with 158 horsepower. A midsize sedan made for the Nissan lovers; a bit sportier than most hybrids.

6. Toyota Camry Hybrid: 33 City/34 Hwy, Base Price: $25,350. 2.4-liter, 4-cylinder with 192-horsepower, reaching 0-60 in 8.9 secs. If you love the original Camry, then you should try the Camry Hybrid because it has better fuel economy and it can be a big saver after a few years.

7. Ford Escape Hybrid (tie): 34 City/30 Hwy, Base Price: $26,640. 2.3-liter, 4-cylinder with 155 hp. Along with 2 other SUV, The Ford Escape Hybrid is the most fuel efficient SUV in the world.

Mazda Tribute Hybrid (tie): 34 City/30 Hwy, Base Prices: $25,310 . 2.3-liter, 4-cylinder with 155 horsepower. If you want an SUV that can save you money on gasoline, why not get this Mazda?

Mercury Mariner Hybrid (tie): 34 City/30 Hwy, Base Price: $26,955 . 2.3-liter, 4-cylinder and 155 horsepower. A small SUV that can be a little pricey, but it will make up for it cost in the long run.

8. Toyota Yaris vs Toyota Corolla. Which Toyota vehicle would you rather own? The Yaris is definitely a better buy, but it is smaller than the average sedan and it functionality is very limited.

Toyota Yaris: 29 City/35 Hwy, Base Price: $11,350.

Toyota Corolla: 28 City/37 Hwy, Base Price: $15,250.

9. Mini Cooper: 28 City/37 Hwy, Base Price: $18,700. Engines: 118hp 1.6 L I4. A small vehicle that can also be purchased as a convertible.

10. Honda Fit vs Ford Focus vs Honda Civic. Which do you prefer out of these 3 cars? All 3 cars are under $16,000 and they will get you around 30-miles per gallon of gas.

Honda Fit: 28 City/34 Hwy, Base Price: $13,950.

Ford Focus: 24 City/35 Hwy, Base Price: $14,395

Honda Civic: 26 City/34 Hwy, Base Price: $15,010

Special Car - Honda Civic GX (run on natural gas): 24 City/36 Hwy, Base Price: $24, 590. 113-hp, 1.8-Liter, 16-Valve, SOHC i-VTEC® 4-cylinder engine. This is probably the most fuel efficient car because natural gasoline costs less than $1.00 a gallon. However, this isn't on the top 10 list because it is currently only available in NY and CA and it is very limited. You probably won't find a natural gas pump at your regular gas station, that is why Honda sells an at home pump you can plug into your home's natural gas line. A full tank (8 gallons) can travels approximately 170 miles and fueling stations are very limited; make sure to plan your trip correctly if you own a Civic GX.

What do you think of this list? If there are better fuel efficient cars available on the market, please list those cars and link to them. We only list cars that are currently available for purchase and has already been on the market. Cars that are in production cannot be on the list because it is not yet available for purchase. Your comment is very valuable and it will help us keep the list accurate.