Campro engine has peak torque at 4000+ RPM, but peak power at 6000+ RPM.
Remember, at 6000+ RPM, the torque curve (graph) is rapidly falling off.

Check here what is OMNIVORE "http://en.wikipedia.org/wiki/Omnivore"

Technical specification

1.2 litre 3-cylinder with 2 valves per cylinder, SOHC, 2-Stokes

Belt driven

Construction

Monoblock with Integrated Exhaust Manifold

All aluminium

Balance shaft (optional)

Direct-coupled generator

Bore and Stroke: 75.0 mm x 90.0 mm

Compression ratio: 10:1

Maximum power: 35 kW (47 bhp) at 3500 rpm via integrated electrical generator

Peak torque: 107 Nm at 2500 rpm

Maximum BMEP: 11.2 bar

Maximum Engine Speed: 3500 rpm

Fuel System: Port fuel injection, Lotus EMS

Fuel: 95 RON ULG / ethanol / methanol

Dry weight:56 kg

It's rare that a three-cylnder 1.2-litre motor gets our juices flowing here, but Lotus Engineering's new 'Range Extender' engine is more interesting than most. Lotus Engineering's primary focus is to develop technology for other manufacturers to use.

It's been designed as an off-the-shelf engine for any production series hybrid, and could be sold to any number of car companies.

The Lotus Range Extender could even find its way into a Jaguar, as it's been developed with Jaguar as part of the UK Technology Strategy Board's 'Limo-Green' scheme, a project funded by Lotus Engineering, MIRA, Caparo and Jaguar. If the new engine does end up in a series production Jag, it could be part of the company's project to make an executive saloon with a CO2 output of less than 120g/km.

Check this "http://www.grouplotus.com/engineering/green_technology.html"

These would be serial component

engine > generator > battery > motor > wheels.

engine + generator = PROJECT OMNIVORE.

With Project Omnivore, Battery size will be small, Long waiting for recharge is eliminate and i reckon we may pump any beer or cooking oil into the engine.

It's cost-effective and cost-efficient without sacrifice power and environment.

Well done Lotus Engineering…

Is that really the formula for calculating hp? How do we calculate using that formula for campro and cps engine. Since campro's torque is 148Nm but only produce 110hp(84kW?), Cps has 150Nm of torque but produces more hp which is 125hp. I cannot understand the simplified formula to calculate hp claimed used by engineers.

September 9, 2009 @ 12:39 pm

20hp ? wat for ? bring up a bicycles ?"

it only makes sense if you actually read the whole article, and not just the part that says (20hp).

September 8, 2009 @ 9:49 pm

I really didn’t get what Mohd was trying to say.

You pointed out, that hp is more important than torque. A Diesel with this displacement will always be better at low rpm in terms of torque and hp…

There seem to be a confusion about hp and torque. The (simplified) formula is: hp=torque x rpm. (for engineers: P = T(au) x ?(omega) where P is power, ? is torque, ? is the angular velocity)

The gas is free but the cost of precessing it into NGV is about RM2 per litre. Yes Petronas is doing charity, thats why they never encourage public to use the NGV and never make it avalaible nationwide,its a burden to them.

as others said, I was not wrong.

Get your facts straight. Claiming your source as "Petronas personel" does not work.

BTW, Shell/BHP/ ESSO does not sell NGV (probably -as you said- because they does not want to participate in the charity)

But they do sell LPG.– those gas we use in our home.

Probably you got that mixed-up.

.

20 kWh li polymer at 120 Wh/kg will weight around 167 kg, if the motors (plus controllers) are 1 kW/kg then this will add another 120 kg, the range extender from Lotus is only 56 kg. The total hybrid sysem will weight around 343 kg, add aroud 10% more for the structures/cables/mountings etc and it will be around 377 kg total mass. How much is the weight of a 1.6 L Campro CPS engine plus the gearbox? Can I assume it is the same as the old Honda 1.6 VTEC of 320 lbs = 145 kg? So the difference is 377 kg – 145 kg = 232 kg. This means that the new Gen2 hybrid will weight 1190 kg + 232 kg = 1422 kg (about 78 kg less than a Peugeot 407).

Power to weight ratio of the non-hybrid Gen2 CPS car is 94kW (125 HP)/1190 kg = 0.079 kW/kg = 0.105 HP/kg. The new proposed hybrid peak power is 120 kW or 160 HP; the proposed hybrid power to weight ratio is 120 kW (160HP)/1422 kg = 0.084 kW/kg = 0.112 HP/kg. Whis is higher than the non-hybrid Gen2 CPS car. Not sure about the other chassis and suspension mods neeed since GVW of Gen2 is only 1560 kg. Maybe Jesse James from Monster Garage can help.

The point of range extender is that it is only used as a secondary source of energy, when a primary power source, like battery in EV, is powering the vehicle. Therefore, if you never travel far, you might not need to burn any fuel.

As oppose to Prius, where the battery is the secondary power, and the petrol engine still the primary workhorse.

So what's your point Mohd? If you look up Proactive magazine there's more info on EV, Alternative Fuel, Hybrids and the Omnivore engine. If you do a little reading on EV you might understand a bit more.

What can you fill a diesel engine with? No spark plug remember? Its all compression. You can't fill it with Ethanol. And yes Diesel engines are heavier than petrol engines coz they need to pressurize the diesel to burn it.

Lotus did make engines on their Sevens, Elans, Espirit. You think Lotus started doing business with Elise?

Somebody said NGV is free. Come let me bring you to Petronas GPPA and GPPB in Kertih and Satong. Or let's bring you offshore Kertih to Resak and offshore Bintulu to Helang and see what a dedicated Gas Platform looks like. Or drive you to Pasir Gudang where they're building Tangga Barat. Then you will see how much money is involved.

Where do people come out with the idea that Natural Gas is a byproduct of producing oil?

Get your head out of that hole.

Why only 2 optimized operating points? Because internal combustion engine maximum thermal efficiency (>25%) is located on a small 'island' and you want to design, tune and operate the engine within this point when turning the generator. If the engine has to drive the gearbox and the wheels, most likely the operating points will be all over the place on the torque-speed curve and overall the engine thermal efficiency will be very low (<15%).

What would be good combination of technologies which this range extender unit can complement? I am thinking four compact in-wheel motors inside each wheel maybe at least 30 kW/motor (4×30 kW = 120 kW = 160 HP total) and a 20 kWh Lithium polymer battery pack which is designed for a new hybrid car platform. The lithium polymer battery pack can follow the shape of the car floor since there is no liquid electrolyte involved. Perhaps in parallel with supercapacitor that can absorb more regenerative braking current than the battery pack can and the supercapacitor can instantaneously release large amount of power for acceleration (just like KERS in Formula 1). Maybe I should slap a large sticker "Eat My Voltage!" on the rear bumper. What else? Hmmm… maybe the plug-in capability and a compact gasifier for home use to create my own fuel.

I can only dream… Proton please make my dream comes true; with German level engineering, Japanese quality, Italian styling and Langkawi price of course!

September 8, 2009 @ 2:40 am

Amazing what only 56kg can do. A non turboed diesel would operate at about the same rpm wouldn’t it? Not sure whether that same weighted diesel could generate the same amount of kinetic energy required. Diesels are big on torque but low in hp. HP is more what you need to turn a small generator.

y do u need hp since the engine is running on constant speed? n do know wat is torque n hp actually? a 700cc diesel engine generator can produce more with 300-500rpm. n its more fuel efficient n u can also power the traditional belt driven air cond pump, n more.

but then again, maybe lotus wan it to be a light engine which is good. n diesel is more noisy then petrol engine.

Highlight: Lotus dont really have or any trademark engine. they use rover, toyota etc.

If you did not maintain this engine well until it is kong… Well… Say bye bye and get a new or secondhand…

Just think of it's valve, how u gonna service it if it is intergrated? Ths most is changing the valve seal…

From the picture it look like timing belt driven, so if the timing belt putus? How to check if the valve bengkok?

your statement:

"RT you’ve got your facts wrong abt NGV.

NGV is practically free and the only cost incurred

is the gas pipeline cost which has skyrocketted"

is a complete nonsense….gas pipeline cost is only a part of the cost for NGV delivery…..and we've got that covered from the Peninsular Gas Pipeline which was actually built for the industry…how can NGV be free when u need to spend millions and billions just to extract gas from the ground? not to mention the cost to keep processing plants running to purify the gas that we got underground….

and actually PETRONAS does lose money from gas subsidy….the gas price for domestic market is way below the operating cost and PETRONAS still have to produce them at a loss…the Malaysian government doesn't pay PETRONAS for that…

- not smart ass comment from me.

Btw, regardless of fuel types (fossil, synthetic, or biological), it still produces emission to the air, only that the amount is varied and types of emission is also different. Correct me if I'm wrong.