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New Heavy-Duty Engine Manufacturer to Build Hydrogen-CNG Engines


Collier Technologies Inc. (CTI) has formed a new US OEM heavy-duty engine manufacturer, City Engines Inc., to develop and to market hydrogen/natural gas (HCNG) engines.

The new OEM has distribution agreements with Daewoo Heavy Industries (DHI) for their heavy-duty gas engines. City Engines initially will offer a base DHI 11-liter engine, outfitted with CTI-designed cylinder heads.

The HCNG 11 uses a 30% hydrogen–70% natural gas blend, and produces produces 282 hp and 866 lb ft of torque. City Engines hopes to implement an improved turbocharger that would boost output to 300 hp and torque to 900 lb ft.

The hydrogen-CNG blend offers better fuel economy and reduced maintenance than CNG alone.

Emissions certifications will be conducted over the next six to 12 months using 100% CNG fuels to meet the existing 2004 CARB Standard as well as with the 30% HCNG blend to meet the upcoming 2007 Standard.


Preliminary testing (chart at right) done by a DOE-sponsored project on HCNG development using a 20% hydrogen-CNG blend demonstrated lower emissions, including a 50% reduction in NOx, than similar engines fueled with CNG alone with no significant change in fuel efficiency.

City Engines will be in direct competition with established manufacturers such as Cummins Westport. HCNG is stimulating interest based on (a) its potential for further emissions reduction than CNG and (b) as a bridge technology to full hydrogen.

In addition to the work sponsored by DOE on HCNG, China is aggressively exploring the fuel’s potential as well.



Mikhail Capone

Typo alert: "City Engines hopes to implement an improved turbocharger that would boost output ***to*** 30 hp and torque to 900 lb ft."

It either should be "by" or "to 312 hp".


Corrected. 300 hp. Thanks.

malintha perera

i interested to buy engine from you. but i seen some small engine like 30HP i want 250 engine to buy so please send me your product detail.

thank you.


Dear Sir,
I am Mr aungmyohtoo from Myanmar. I want to know about of CNG esearch program. But I have not enough to slove fueling system of CNG engine. So I want to know about of CNG engine. PLease tell and guide to me. I would not forget to your help. PLease let me stop here. I am waiting for your reply.
With best wishes!

Khin Sein

We would like to CNG vehilal,saloon,Bus,mini bus and truck.

Mr.Kyaw Kyaw Aung

I am from Myanmar.I would like to import CNG saloon/ wagon/ bus of used or brand new.I would also interesting in CNG engine alone for various Hp.Can you please kindly give me the detail information,photos and your best offer prize.Waiting your reply soon.
Thanks and best regard.

Mr.Kyaw Kyaw Aung

I am from Myanmar.I do want to import CNG saloon/ wagon of used/ brandnew.Can you please give me detail information about which your company can supply.I will waiting your reply soon.

IVKOM Limited

Please help me to know about CNG Auto Engines and what are the differences with Petrol engines (if possible attached some pictures). I also like to be familiar with your CNG Products --- please provide some information about your company’s CNG Vehicles, such as, Sedan car, Van, Pickup, Light Trucks, Heavy Trucks and Bus etc. or its engines (with a range from 1,300 cc and more).

Ramnikbhai Patel

We introduce ourselves as leading developers and manufacturers of various types of Power Saving Equipments, Power Substitute Gas Operated Heating Systems, Gas Operated Engines and Power Generator, etc. We are regular need of Automobile Petrol Engines of your all car models. You, therefore, are kindly requested to please send us your best price offer alongwith terms and technical details as early as possible and oblige.

fatemeh rezaii

it was a good article about cng motors but I need more infrmation about these cars if have any idea wich you think that would help me please send them to the above address.
thanks a lot
fatemeh rezakhany

divy shah

dear sir,
I want to get complete information of cng engines.especially I want to know how it's working differ from petrol engine and what are the main changes done in cng engine.I want to know which kind of cylinder liners are used in this system. I mean its metal composition or any other changes done by the company.

Salman Farhanieh

Dear Sir
I'm a BS student at Sharif University of Technology school of mechanical engineering
and I am doing a research on TWO WHEEL CNG MOTORCYCLES. I have some questions
about the subject. So I would be very pleased if you could answer the questions
listet bellow:
1. Does your compant produce CNG motocycle kits?
2. If not which companys are active in the production of the kits?
3. Which countries are active in the pruduction of the CNG motorcycle
specially Two wheel CNG motorcycles.
3. Where can I find related information?
I'm looking forward to your reply.
Yours sincerely,
Salman Farhanieh

Miguel Sanchez

I like to convert a commins diesel engine to CNG please sen me some informatoin .
I will be waiting for some answer
Yours sincerely,
Miguel Sanchez

Miguel Sanchez

I like to convert a commins diesel engine to CNG please sen me some informatoin .
I will be waiting for some answer
Yours sincerely,
Miguel Sanchez

Jyothi Kumar

I am interested in converting the cummins and cat engines into CNG. Please guide and give details
Jyothi kumar


I am looking for CNG cylinders for CNG engine for 12m city bus. Pls tell me some names of qualified suppliers whose cylinders must have passed CE or American certificate.

Thanks a lot.


[email protected]


I am a car dealer and i want to know more about working of CNG kits. Is it possible to make a hybrid vechile working on CNG and have characteristics of Electric vechile i.e have a battery and motor.
It will be great help if you can give some information on it.
Thanking you

Adriana P

Dear Sir
I'm a MENg student at McGill University and I am doing a research on TWO WHEEL CNG MOTORCYCLES.
I have some questions:
1. Which companys are active in the production of 2 wheel CNG motorcycles?
2. Is it feasible to adapt a motorcycle to CNG, what about the size of the tank??
I'm looking forward to your reply.

Adriana P.


Iwant information about this system.
please send me this information& price list.
tanks a lot,

weilin lee

Dear Mr.

How are you !

First of all, you are kindly introduced that our Chongqing Big Science & Technology Development(Group) Co., Ltd is a professional manufacturer and supplier who is devoted to research and develop high quality CNG series 2 & 3 & 4 wheels vehicles for market through its base of Chongqing China.

Currently, we are doing manufacture and supplying our these new type high quality CNG 2 wheels motorcycle,which is our Patent products to your market:

We are top professional CNG products manufacturer and supplier in China.
We recommend our patent products which BGMT brand CNG motorcycle with CKD term and CBU term.
For the CNG 2 wheel motorcycle characteristic:
1, Safety and Reliablity:
CNG Cylinder had passed NZ5454, which can bear 350 KG atmospheric pressure, Nominal working pressure is 20 MPa. Manufacture stardand of CNG conversion kit is ISO15500, our patent has unique technology wordwide,
2, Applicability:
CNG motorcycle can run 100km if you once fill the gas fully,the CNG motorcycle shape like fashionable model(such as CD 70 type ,CG 125 type and Tailand Honda) it is very beautiful and very suitable for local custom. The new technology have very capacious foreground, it can bring you very infinite business chance,and we have no agent until now,we are searching our best nice business partner,hope we can cooperate with you and set up long term business relation.

For the target of us above, we are currently looking for the good business and professional partner to promote our these CNG 2 wheels motorcycle very well also target for assembling them locally for ensureing large order quantity and profit for two sides.

Of course, your background and position of business line has been our preferred one of them. so, it will be much appreciating for us to get any advice from your side promptly.

Looking forward to your reply soon!
(For the avoidance letter be lost,When you reply our letter, suggest write back to three E-mail box at the same time.)
E-mail : [email protected] ; [email protected] ; [email protected]
Mr.Weilin Lee
China Chongqing Big (Group) Co. Ltd
(branch No.4 )BIG CNG Compressor Manufacture factory
(branch No.5 )Chuanjiang automobile Manufacture factory
Chongqing Big Science & Technology Development Co. Ltd (Big Group I/E Dept. )
Telephone: +86-23-67635049 ;+86-23-67635035 -(operate)- 605;(office)
Fax:+86-23-67635036; MSN: [email protected]


Dear sears,I have made conversin on dizel engine to use CNG and dizel together full time.Dizel charg is decrease to 40%,with CNG is replease 60%.Practicaly we reach two targets one;economical with 30-50%minimise of cost for driving,depends of prise fordizel and CNG.
two;ecological with minimasing of emisions.Engine is 2.5turbo without catalizator,
emisions we chack:CO=0.07%,transparents of exaust fun is 6 times lover in comparation vhen these engine vorking vith 100% dizel.CO2 we didnt check for now.I drove these big van troght SERBIA,CROATIA,SLOVENIA,ITALIA,AUSTRIA,HUGARIA,GERMANY in latest three mounts about 7000km.For conversion I use Italian INIECTION kit for petrol to LPG or CNG conversin.Everithyng alse we did in my company.
I lokingn to find partners in abroud to begin vork on thems market.
WWW.euroteh-gas.co.yu [clik to autogas or eco gas]


i cant understand what u wanna say i need more diteels about it , if possibole please send me some paper

Javad Seifian

Dear Sirs,
I am looking for OEM CNG auto engine manufacturers worldwide preferably in 2000-2400 cc category for vans,pick-ups and SUV's.
I appreciate any help I can Inquire.
Best regards.

ruhit das

dear sir,
I am a mechanical engineering student i want to get technical details related to cng engine.

Pakawat Sirimahachai

To who it may concern

My name is Pakawat Sirimahachai, Managing Director of NGVPOWER(Thailand) Co.,LTD. We are the CNG conversion company in the South ofThailand.After we visit your website, We are interesting to import
your Hydrogen CNG engine. OUR capacity is 500 trucks and Buses per year. Now, our objective is to install your engine with heavy truck, size of our ngine is 195 Hp-320 HP. CNG conversion in Thai Market is very attractive. We would like to request more information.
1. The engine specification
2. The quatation for each model
3. The minimum Order

Thank You.
Sincerely Yours
Pakawat S.

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