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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

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