--- title: Bi Fuel Generators | Generator Conversion Specialists description: Bi fuel generator conversion services to improve efficiency and flexibility, allowing generators to operate on both diesel and gas fuels. --- [30th Growth Ave, NY 1003, USA](https://g.page/hubspot-cambridge-25-first?share) [+212-800-1234](tel:+212-800-1234) [info@yourcompany.com](mailto:info@yourcompany.com) Amazing [01709 711 084](tel:+212-800-1234) [info@apeltd.com](mailto:info@yourcompany.com) [![ape-logo-white](https://www.appliedpowerengineering.com/hs-fs/hubfs/ape-logo-white.png?width=204&height=75&name=ape-logo-white.png "ape-logo-white")](https://www.appliedpowerengineering.com/) [![ape-logo](https://www.appliedpowerengineering.com/hs-fs/hubfs/ape-logo.png?width=204&height=75&name=ape-logo.png "ape-logo")](https://www.appliedpowerengineering.com/) - [Home](https://www.appliedpowerengineering.com) - Solutions - [Emergency Back Up Generators](https://www.appliedpowerengineering.com/emergency-generator) - 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[Renewable Energy](https://www.appliedpowerengineering.com/applications/renewable-technology) - [Power and Control Solutions](https://www.appliedpowerengineering.com/solutions/power-and-control-solutions) - [Bi-Fuel Conversions](https://www.appliedpowerengineering.com/bi-fuel-conversions) - Resources - [Blog](https://www.appliedpowerengineering.com/blog) - [Downloads](https://www.appliedpowerengineering.com/downloads) - [Case Studies](https://145611569.hs-sites-eu1.com/blog/tag/case-studies) - [About Us](https://www.appliedpowerengineering.com/about-us) - [Environmental Impact](https://www.appliedpowerengineering.com/environmental-impact) - [Vacancies](https://www.appliedpowerengineering.com/vacancies) - [Contact](https://www.appliedpowerengineering.com/contact) More results [Book A Free Discovery Call](https://www.appliedpowerengineering.com/book-a-free-discovery-call) [Book A Free Discovery Call](https://www.appliedpowerengineering.com/book-a-free-discovery-call) [Book A Free Discovery Call](https://www.appliedpowerengineering.com/book-a-free-discovery-call) - [Home](https://www.appliedpowerengineering.com) - Solutions - [Emergency Back Up Generators](https://www.appliedpowerengineering.com/emergency-generator) - [Service and Maintenance](https://www.appliedpowerengineering.com/generator-service-and-repair) - [Generator Upgrade or Replacement](https://www.appliedpowerengineering.com/upgrade-generator) - Services - [Engineering Services](https://www.appliedpowerengineering.com/optioneering-engineering-services) - [Commissioning](https://www.appliedpowerengineering.com/generator-commissioning) - [Installation and Conversion Services](https://www.appliedpowerengineering.com/generator-installation-services) - [Control System Design and Supply](https://www.appliedpowerengineering.com/generator-control-system) - Providers - [COMAP](https://www.appliedpowerengineering.com/comap-power-management-system) - [Deep Sea](https://www.appliedpowerengineering.com/deep-sea-control-system) - Applications - [Diesel](https://www.appliedpowerengineering.com/industrial-diesel-generator) - [Gas](https://www.appliedpowerengineering.com/industrial-gas-generator) - [Control Systems](https://www.appliedpowerengineering.com/control-systems) - [Renewable Energy](https://www.appliedpowerengineering.com/applications/renewable-technology) - [Power and Control Solutions](https://www.appliedpowerengineering.com/solutions/power-and-control-solutions) - [Bi-Fuel Conversions](https://www.appliedpowerengineering.com/bi-fuel-conversions) - Resources - [Blog](https://www.appliedpowerengineering.com/blog) - [Downloads](https://www.appliedpowerengineering.com/downloads) - [Case Studies](https://145611569.hs-sites-eu1.com/blog/tag/case-studies) - [About Us](https://www.appliedpowerengineering.com/about-us) - [Environmental Impact](https://www.appliedpowerengineering.com/environmental-impact) - [Vacancies](https://www.appliedpowerengineering.com/vacancies) - [Contact](https://www.appliedpowerengineering.com/contact) [![Book A Free Discovery Call](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/145611569/interactive-218811308226.png)](https://www.appliedpowerengineering.com/hs/cta/wi/redirect?encryptedPayload=AVxigLKEcexS7engUyEpIgAaIOe5NwxBOJBuOw6jDFet4Ju5wOWCQX9rqebfY0Fj8Jvj3tw18Zm8QWWvcA3QXzHxX0DtwtErGp5v0BSel8griCtxnP4lpg%2FDOMWNybqdmhghnbdIrwnPgsotkmYpPonqiBxP%2FI3l7rcBPvtmIkfCptVz5tHkhO1jdZtNnk4u6Ijwsp5v8KqkWV1Ombw%3D&webInteractiveContentId=218811308226&portalId=145611569) [01709 288859](tel:01709-288859) [info@apeltd.com](mailto:info@apeltd.com) # Bi-Fuel Generator Conversions Until relatively recently, diesel backup generators were really the only practical option for emergency power, although the growing focus on using cleaner energy and sustainability is one of the reasons why more customers are choosing bi-fuel conversions. The fuel can be gas or diesel, although our gas-powered generators are used mainly for combined heat and power (CHP) installations. Bi-fuel (Dual Fuel) helps you economise on cost by switching between different fuels. We can install new bi-fuel generators or convert your existing asset. APE’s simple bi-fuel (dual fuel) conversion modifies your original diesel engine so that it uses natural gas as the main fuel – substantially reducing operating costs. It works by introducing gas to the engine via various technologies and then electronically controlling flow dependent on engine speed and output. [![Request A Site Survey](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/145611569/interactive-218807962871.png)](https://www.appliedpowerengineering.com/hs/cta/wi/redirect?encryptedPayload=AVxigLL0NnDUnvcC8%2BWiq1xxDeY7hg0gPag0OD7Gg%2FzTKZQ3VuCJcz0YPvI%2BHfeOxIxZ%2FoMlKWJwzl7QiA7xjv7Brn1%2FfkwkYRZMud46t%2BQ3YFQ9U94rsuRL%2BhP0LPH%2Fc8BvLbQilHUTXv06Kgv43opJ%2BfORO1Ebpnp549YZyPAamDRY5m2JOeHR5ozRyMIV7WHCLXjaQr7z&webInteractiveContentId=218807962871&portalId=145611569) ![Bi fuel](https://www.appliedpowerengineering.com/hs-fs/hubfs/Bi%20fuel.webp?width=1036&height=464&name=Bi%20fuel.webp) Bi-fuel (dual fuel) conversion requires virtually no engine modification and brings double benefits in every application: 1 #### Affordable diesel engines combined with inexpensive natural gas Affordable diesel engines combined with inexpensive natural gas 2 #### Economic solution for slow-speed, middle-speed and high-speed engines Economic solution for slow-speed, middle-speed and high-speed engines 3 #### Flexible use of fuel Flexible use of fuel 4 #### Guaranteed power output Guaranteed power output 5 #### Efficient and safe operation with lower emissions Efficient and safe operation with lower emissions 6 #### Longer engine life and reduced maintenance costs makes it the perfect investment Longer engine life and reduced maintenance costs makes it the perfect investment ## Benefits: #### Substantial savings on operation costs #### Lower emissions #### Slow and Middle Speed Conversions #### Practically no engine modification required #### Longer engine life span #### Non-derated output power #### High speed engines - central gas/air mixer (fumigation) #### Prolonged service and maintenance intervals #### Slow and middle speed engines - individual gas-valve technology #### Possibility of original diesel operation at any time #### Types of Bi-Fuel Conversions #### High Speed Conversions Substantial savings on operation costs Practically no engine modification required Non-derated output power Possibility of original diesel operation at any time Lower emissions Longer engine life span Prolonged service and maintenance intervals Types of Bi-Fuel Conversions Slow and Middle Speed Conversions High speed engines - central gas/air mixer (fumigation) Slow and middle speed engines - individual gas-valve technology High Speed Conversions [![Request A Site Survey](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/145611569/interactive-218807962871.png)](https://www.appliedpowerengineering.com/hs/cta/wi/redirect?encryptedPayload=AVxigLL0NnDUnvcC8%2BWiq1xxDeY7hg0gPag0OD7Gg%2FzTKZQ3VuCJcz0YPvI%2BHfeOxIxZ%2FoMlKWJwzl7QiA7xjv7Brn1%2FfkwkYRZMud46t%2BQ3YFQ9U94rsuRL%2BhP0LPH%2Fc8BvLbQilHUTXv06Kgv43opJ%2BfORO1Ebpnp549YZyPAamDRY5m2JOeHR5ozRyMIV7WHCLXjaQr7z&webInteractiveContentId=218807962871&portalId=145611569) ## Solutions Available For: ### **High Speed Conversions - central gas/air mixer (fumigation)** Gas is mixed with air by a common mixer installed before the turbocharger(s). Gas flow is controlled by a throttle valve, which is electronically operated by the ComAp control system InteliDrive BF according to the required engine output and speed. In order to avoid knocking of the engine, ComAp knocking detector/controller DENOX is installed, enabling engine operation at the most efficient gas/diesel ratio. System for conversion of industrial diesel engines to bi–fuel operation by substitution of typically 50–80% natural gas for diesel. - Suitable for all High Speed Engines, 1200–1800 RPM - No reduction of engine power or efficiency - Smooth transition between diesel and bi–fuel operations at any time - Gas and air are blended behind air filter before turbocharger by central mixer - State of the art electronics maximizes the amount of injected gas while keeping all engine parameters within limits specified by the engine manufacturer - No modifications of internal engine components are required ![LV Switchboard with loadbank ready for commissioning](https://www.appliedpowerengineering.com/hs-fs/hubfs/Images/LV%20Switchboard%20with%20loadbank%20ready%20for%20commissioning.webp?width=4032&height=3024&name=LV%20Switchboard%20with%20loadbank%20ready%20for%20commissioning.webp) ### Benefits: #### Completely automatic system #### Cheaper electricity production #### Non–derated output power #### The same response to load steps #### The amount of gas is maximised as much as possible under varying conditions at any time #### High stability and increased protection of the engine #### Lower emissions #### Possibility of pure diesel operation maintained #### Prolonged service intervals #### Turn-key solution #### Easy operation - Completely automatic system - Cheaper electricity production - Non–derated output power - The same response to load steps - The amount of gas is maximised as much as possible under varying conditions at any time High stability and increased protection of the engine Lower emissions Possibility of pure diesel operation maintained Prolonged service intervals Turn-key solution Easy operation ![four-pistons-with-connecting-rods-on-engine](https://www.appliedpowerengineering.com/hs-fs/hubfs/Images/case-study/four-pistons-with-connecting-rods-on-engine.webp?width=1600&height=900&name=four-pistons-with-connecting-rods-on-engine.webp) ### Typical Convertable Engines High-speed (1200 – 1800 rpm) Elemental of the System - Air / gas mixer(s) - Gas throttle valve with actuator - ComAp bi-fuel controller/governor InteliDrive BF - ComAp knocking detector/controller DENOX2/DENOX20 - Sensors (acoustic, pressure, temperature, etc.) - Gas train (gas manifold, gas governor, double closing valve, filter, ball valve etc.) ### **Slow and Middle Speed Conversions - Individual gas-valve technology** This works by gas being injected into the cylinder inlet manifold by individual gas electromagnetic valves installed as close to the suction valves as possible. The electromagnetic valves are separately timed and controlled by the ComAp injection control unit INCON. This system interrupts the gas supply to the cylinder during the long overlap of the suction and exhaust valves (typical for slow-speed and medium-speed engines – while the valve overlap cylinder scavenging is performed). This avoids substantial gas losses and prevents dangerous gas flow to the exhaust manifold. System for conversion of industrial diesel engines to bi–fuel operation by substitution of typically 60–90% natural gas for diesel or HFO. - Suitable for engines with speed below 1000 RPM and output above 500 kW - No reduction of engine power or efficiency - Smooth transition between diesel and bi–fuel modes at any time - Gas is injected directly before intake valve by high speed electromagnetic valves, one valve per cylinder - No modification of internal engine components is required - Automatic equalization of exhaust gas temperatures from individual cylinders ### Benefits: #### Extremely efficient operation – only very small percentage of diesel is necessary #### Cheaper electricity production #### Non-derated output power #### The same response to load steps #### High stability and increased protection of the engine #### Lower emissions #### Possibility of pure diesel operation maintained #### Prolonged service intervals #### Individual approach #### Turn-key solution #### Easy operation Extremely efficient operation – only very small percentage of diesel is necessary Cheaper electricity production Non-derated output power The same response to load steps High stability and increased protection of the engine Lower emissions Possibility of pure diesel operation maintained Prolonged service intervals Individual approach Turn-key solution Easy operation ### Typical Convertable Engines - Slow-speed (up to 750 rpm) turbocharged - Middle-speed (around 1000 rpm) turbocharged ## Our Delivery Partners --- [![ComAp Logo](https://www.appliedpowerengineering.com/hs-fs/hubfs/ComAp-master-logo-with-R.png?width=200&height=49&name=ComAp-master-logo-with-R.png)](https://uk.comap-control.com/) [![DeepSea Logo](https://www.appliedpowerengineering.com/hs-fs/hubfs/DeepSea-logo.png?width=770&height=200&name=DeepSea-logo.png)](https://www.deepseaelectronics.com/) ## Book A Free Discovery Call --- Unlock the potential of your power systems with a free discovery call at Applied Power Engineering. Our expert team is eager to understand your unique challenges and goals, providing personalized insights and solutions tailored to your needs. This no-obligation consultation allows us to assess your requirements and explore how we can enhance your operations. Take the first step towards optimised performance—schedule your free discovery call today! ## From Our Blog Stay up to date with what is new in our industry, learn more about the upcoming products and events. [Why Industrial Backup Generators Are Essential For Business Continuity](https://www.appliedpowerengineering.com/blog/investing-in-generators-and-control-systems) ![An emergency back up generator on a transporter on the way to getting installed. ](https://d37oebn0w9ir6a.cloudfront.net/account_50857/the-importance-of-investing-in-generators-and-control-systems-for-power-backup_8d3eeeb24c48894c1f0ccc36376a5bdd.jpg) [Generator control system](https://www.appliedpowerengineering.com/blog/tag/generator-control-system) #### Why Industrial Backup Generators Are Essential For Business Continuity Jul 21, 2025 11:03:09 AM 3 min read [Why Backup Generators for Data Centres Are Essential For Operations](https://www.appliedpowerengineering.com/blog/power-supply-for-data-centre) ![The data equipment in a data centre that is secured with an emergency generator in the case of an power outage.](https://d37oebn0w9ir6a.cloudfront.net/account_50857/why-backup-generators-are-essential-for-data-centre-operations_131af255bcf53d1db523b541471ff9f3.jpg) [Emergency generator service](https://www.appliedpowerengineering.com/blog/tag/emergency-generator-service) #### Why Backup Generators for Data Centres Are Essential For Operations Jul 18, 2025 11:49:47 AM 3 min read [The Critical Importance Of Hospital Backup Generators](https://www.appliedpowerengineering.com/blog/hospital-backup-generator-requirements) ![A hospital ward that has had uninterrupted processes due to the back up power supplied by the emergency generator systems in place.](https://d37oebn0w9ir6a.cloudfront.net/account_50857/the-critical-importance-of-hospital-backup-generators_384ea3b381dff95a4057b589a5c20346.jpg) [generator](https://www.appliedpowerengineering.com/blog/tag/generator) #### The Critical Importance Of Hospital Backup Generators Jul 8, 2025 10:52:03 AM 2 min read [View All](https://www.appliedpowerengineering.com/blog) ## Our Accreditations --- [![ISO-9001-quality-management-systems-logo](https://www.appliedpowerengineering.com/hs-fs/hubfs/ISO-9001-quality-management-systems-logo.webp?width=125&height=63&name=ISO-9001-quality-management-systems-logo.webp)](https://www.bsigroup.com/en-GB/capabilities/quality-management/iso-9001-quality-management-systems/) [![approved-contractor](https://www.appliedpowerengineering.com/hs-fs/hubfs/approved-contractor.webp?width=125&height=73&name=approved-contractor.webp)](https://niceic.com/for-the-trades-1/professional-standards/schemes/approved-contractor-scheme/) [![achilles](https://www.appliedpowerengineering.com/hs-fs/hubfs/achilles.webp?width=125&height=65&name=achilles.webp)](https://www.achilles.com/) [![safe-contractor](https://www.appliedpowerengineering.com/hs-fs/hubfs/safe-contractor.webp?width=90&height=91&name=safe-contractor.webp)](https://www.safecontractor.com/en-gb/) [![avetta](https://www.appliedpowerengineering.com/hs-fs/hubfs/avetta.webp?width=125&height=44&name=avetta.webp)](https://www.avetta.com/) ![ape-logo-white](https://www.appliedpowerengineering.com/hs-fs/hubfs/ape-logo-white.png?width=206&height=75&name=ape-logo-white.png) ###### Applied Power Engineering Limited Unit 12-12A Waddington Way Rotherham S65 3SH T: 01709 711084 ###### Company Registration No: 4288048 Vat No: 157 8089 69 [Browse our GitHub projects](https://uk.linkedin.com/company/applied-power-engineering) Solutions - [Emergency Back Up Generators](https://www.appliedpowerengineering.com/emergency-generator) - [Service and Maintenance](https://www.appliedpowerengineering.com/generator-service-and-repair) - [Generator Upgrade or Replacement](https://www.appliedpowerengineering.com/upgrade-generator) - [Industrial Backup Generators](https://www.appliedpowerengineering.com/industrial-backup-generator) - [Commercial Backup Generators](https://www.appliedpowerengineering.com/commercial-backup-generator) Services - [Engineering Services](https://www.appliedpowerengineering.com/optioneering-engineering-services) - [Commissioning](https://www.appliedpowerengineering.com/generator-commissioning) - [Installation and Conversion Services](https://www.appliedpowerengineering.com/generator-installation-services) - [Control System Design and Supply](https://www.appliedpowerengineering.com/generator-control-system) Providers - [COMAP](https://www.appliedpowerengineering.com/comap-power-management-system) - [Deep Sea](https://www.appliedpowerengineering.com/deep-sea-control-system) Applications - [Diesel](https://www.appliedpowerengineering.com/industrial-diesel-generator) - [Gas](https://www.appliedpowerengineering.com/industrial-gas-generator) - [Control Systems](https://www.appliedpowerengineering.com/control-systems) - [Renewable Energy](https://www.appliedpowerengineering.com/applications/renewable-technology) - [Power and Control Solutions](https://www.appliedpowerengineering.com/solutions/power-and-control-solutions) - [Bi-Fuel Conversions](https://www.appliedpowerengineering.com/bi-fuel-conversions) Resources - [Blog](https://www.appliedpowerengineering.com/blog) - [Downloads](https://www.appliedpowerengineering.com/downloads) - [Case Studies](https://145611569.hs-sites-eu1.com/blog/tag/case-studies) - [About Us](https://www.appliedpowerengineering.com/about-us) - [Environmental Impact](https://www.appliedpowerengineering.com/environmental-impact) - [Vacancies](https://www.appliedpowerengineering.com/vacancies) - [Contact](https://www.appliedpowerengineering.com/contact) Industries - 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