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A global power-technology company supplying engines, power-generation equipment, components, emissions systems, and zero-emission propulsion technologies.

Last updated October 7, 2026

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Overview

Cummins is an American multinational power-technology company headquartered in Columbus, Indiana. Established in 1919 by mechanic and inventor Clessie Lyle Cummins and banker William Glanton Irwin, the company initially concentrated on developing and commercializing diesel engines at a time when the technology was still seeking dependable commercial applications. Its early engineering work included endurance demonstrations, but the company’s first significant breakthrough came with the Model H engine, which gained acceptance in railroad switcher applications during the 1930s. The company expanded substantially after the Second World War as highway construction, trucking, industrialization, and infrastructure investment increased demand for durable heavy-duty engines. Cummins N Series engines became particularly influential in the North American truck market during the 1950s. Over time, Cummins developed from an engine manufacturer into a diversified power-solutions group covering engines, generators, alternators, turbochargers, filtration, fuel systems, electronic controls, after-treatment equipment, and aftermarket service. Its engine portfolio serves heavy- and medium-duty trucks, buses, recreational vehicles, construction and mining equipment, agricultural machinery, marine vessels, rail applications, oil and gas equipment, military vehicles, and stationary power systems. The company’s components activities include Cummins Turbo Technologies, whose products continue to use the Holset name; Cummins Filtration, associated with the Fleetguard brand; Cummins Emission Solutions; and electronics and fuel-system operations. Cummins also operates through distribution and service networks, including company-owned distributors, joint ventures, independent distributors, and dealers. Cummins expanded internationally through manufacturing, technical centers, subsidiaries, and joint ventures. Important relationships and operations have included Dongfeng Cummins in China, Beijing Foton Cummins, Guangxi Cummins Industrial Power, Cummins India, and technical-development activities in India and the United Kingdom. Its acquisition of Onan brought generator and mobile-power products into the group, while the purchase of Holset and Nelson Industries strengthened turbocharging and emissions capabilities. The Onan name remains associated with selected generator products, even as the company has consolidated much of its power-systems branding under Cummins. The company has also responded to increasingly strict emissions rules and changing powertrain technology. In 2023, Cummins rebranded its New Power business as Accelera by Cummins. Accelera develops batteries, hydrogen fuel cells, electrolyzers, electric axles, traction systems, and other zero-emission technologies for commercial vehicles and industrial applications. Cummins continues to supply diesel and natural-gas technologies while investing in electrification, hydrogen, emissions after-treatment, and low-carbon power generation. Cummins sells products and services globally through a network reported in company and reference materials as covering roughly 190 countries and territories, with more than 600 company-owned and independent distributors and approximately 7,200 dealers. Its market position rests on engineering expertise, installed-base support, component integration, and the ability to provide complete power systems rather than only individual engines. At the same time, the company’s history includes significant regulatory scrutiny, particularly the 1998 Clean Air Act matter concerning emissions-control software, which remains an important part of its corporate record.

History

Cummins was incorporated in Columbus, Indiana, on February 3, 1919, by Clessie Lyle Cummins and William Glanton Irwin. Cummins brought mechanical skill and inventive interest in diesel engines, while Irwin supplied banking and business support. The company was formed roughly two decades after the invention of the diesel engine and sought to make the technology sufficiently reliable and economical for commercial use. During its early decades, Cummins attempted to establish credibility through public endurance demonstrations and long-distance operating trials. These tests helped show that diesel engines could provide durability and fuel efficiency, although commercial success developed gradually. A decisive early step came in 1933 when the Model H engine found a useful application in small railroad switchers. This helped validate Cummins engineering and provided a platform for later industrial expansion. The company’s strongest early growth came after the Second World War. The United States entered a period of major road construction and freight expansion, creating demand for powerful and reliable truck engines. Cummins N Series engines became a leading product family, and reference material indicates that more than half of the U.S. heavy-duty truck market used Cummins engines during portions of the 1952–1959 period. This installed base also supported a broader business in maintenance, parts, distribution, and technical service. Cummins began establishing a more international manufacturing presence in the 1960s, including an assembly plant in Shotts, Scotland. That facility later closed in 1996, but the company’s international reach continued to grow through plants, distributors, joint ventures, and technical centers. By 2013, Cummins reported operations in 197 countries and territories, while current reference material describes sales in approximately 190 countries and territories. Diversification became central to the company’s development. Cummins expanded beyond complete engines into turbocharging, filtration, fuel systems, electronics, alternators, power controls, and exhaust after-treatment. The acquisition of Holset in 1973 gave Cummins a turbocharger business that later became Cummins Turbo Technologies, while Holset remained the product brand for many turbocharger offerings. Nelson Industries was acquired in 1999 as emissions-control systems became increasingly important under stricter environmental standards. The company also built a major power-generation business. Cummins began acquiring Onan in 1986 and completed the transaction in 1992. Onan’s generator products became part of Cummins Power Generation and later Cummins Power Systems, serving recreational vehicles, marine applications, commercial mobility, homes, and industrial users. Cummins subsequently sought to simplify its power-systems branding by consolidating Cummins Power Generation and Cummins Onan activities under the Cummins name, while retaining Onan as a product line in selected mobile-generator markets. Cummins expanded its distribution and service capabilities through company-owned distributors, joint ventures, independent distributors, and dealers. Its business structure has included engine operations, component businesses, power systems, distribution, and aftermarket support. Engine markets have ranged from heavy-duty trucks and buses to mining, construction, rail, marine, agriculture, oil and gas, military, and stationary power. International partnerships have been especially important in China and India. Chinese operations and joint ventures have included relationships with Dongfeng, Foton, LiuGong, and other industrial partners. The Beijing Foton Cummins relationship produced the ISG/X12 heavy-duty platform, which became a high-volume engine family in China. Cummins entered India in 1962 through a joint venture with the Kirloskar Group and later increased its ownership. India became an important manufacturing, engineering, and research location, including the Cummins Technical Centre India in Pune and Cummins-supported educational initiatives. Environmental regulation has shaped Cummins’ strategy as well as its reputation. In 1998, the EPA accused Cummins and other diesel manufacturers of using software that reduced or disabled emissions controls during ordinary highway operation while preserving compliance during laboratory tests. The resulting fines and corrective commitments became one of the most consequential regulatory episodes in the company’s history. Cummins subsequently continued investing in fuel efficiency, exhaust after-treatment, electronic controls, natural-gas engines, and other emissions technologies. In the 2010s, Cummins pursued natural-gas power and expanded its portfolio of increasingly integrated power systems. In 2017, United Rentals acquired Cummins’ mobile power-generation assets, with some employees moving to United Rentals to support continuity. Cummins also continued developing electric and alternative-energy technologies. In 2022, it announced a clean-energy investment initiative that included electrolyzer production and other technologies. In 2023, its New Power business was rebranded Accelera by Cummins, bringing batteries, hydrogen fuel cells, electric axles, traction systems, and electrolyzers under a clearer zero-emission identity. Today, Cummins remains an active publicly traded corporation whose business combines conventional engines, components, power-generation equipment, distribution, service, and emerging zero-emission systems. Its historical strength is the integration of engineering, manufacturing, and aftermarket support across demanding commercial and industrial applications; its strategic challenge is to preserve that strength while adapting to emissions regulation, electrification, hydrogen, and changing fleet economics.

  • 2023

    Accelera by Cummins is introduced

    [1]

    Cummins rebrands its New Power unit as Accelera by Cummins to develop and commercialize zero-emission technologies.

  • 2022

    Clean-energy investment initiative receives national attention

    [1]

    Cummins announces a major initiative involving clean-energy technologies, including electrolyzers; U.S. President Joe Biden visits its Fridley, Minnesota facility during an Investing in America tour.

  • 2017

    United Rentals acquires Cummins mobile power assets

    [1]

    United Rentals acquires Cummins’ mobile power-generation assets, with some Cummins personnel transferring to support the business.

  • 2013

    Cummins reports broad international operations

    [1]

    Reference material describes Cummins as operating in 197 countries and territories by this point.

  • 2006

    Holset division adopts Cummins Turbo Technologies name

    [1]

    The turbocharger division changes its corporate name while continuing to market products under the Holset brand.

  • 2003

    Cummins establishes a research center in India

    [1]

    Cummins establishes a research and technology center in India, reinforcing Pune as an engineering location.

  • 1999

    Nelson Industries is acquired

    [1]

    Cummins acquires Nelson Industries to expand its exhaust after-treatment and emissions-control capabilities.

  • 1998

    EPA emissions case

    [1]

    Cummins and six other diesel manufacturers face major EPA fines and corrective commitments related to emissions-control software.

  • 1992

    Onan becomes part of Cummins

    [1]

    The Onan acquisition is completed, strengthening Cummins’ power-generation and mobile-generator portfolio.

  • 1986

    Cummins begins acquiring Onan

    [1]

    Cummins starts acquiring Onan, a generator manufacturer; the acquisition is completed in 1992.

Products and positioning

A premium, engineering-led provider of dependable commercial, industrial, and distributed-power systems, increasingly positioned around emissions reduction and the transition to zero-emission power.

  • Heavy-duty diesel engine

    X15

    The X15 is Cummins’ modern large-displacement inline-six engine family for demanding heavy-duty applications. It is associated with highway trucking and other commercial uses, with variants emphasizing performance, operating efficiency, and compliance with changing emissions requirements. The platform represents the continuation of Cummins’ long-running heavy-duty engine tradition and is one of the company’s most recognizable current engine families.

  • Medium-duty diesel engine

    B6.7

    The B6.7 is a six-cylinder engine platform used across medium-duty trucks, buses, vocational vehicles, and industrial equipment. It belongs to the broader B Series lineage that evolved from Cummins’ ISB family. Applications and specifications vary by market and emissions regime, allowing the platform to serve both on-highway and selected off-highway customers.

  • Medium-duty diesel and alternative-fuel engine

    L9

    The L9 is an inline-six engine family for buses, medium- and heavy-duty trucks, and related commercial equipment. Cummins has also developed natural-gas variants in this displacement class. The L Series represents the evolution of earlier ISL engines and is intended for operators requiring a balance of power density, durability, serviceability, and emissions performance.

  • Power generation

    Cummins Power Systems generator sets

    Cummins Power Systems supplies integrated stationary and mobile power equipment, including generator sets, alternators, switchgear, automatic transfer switches, and paralleling systems. These products serve standby, prime, commercial, industrial, data-center, healthcare, construction, and other applications. The business combines engines and electrical equipment with installation, controls, parts, and service support.

  • Mobile and recreational-vehicle generators

    Onan

    Onan is a long-established generator product brand incorporated into Cummins through the acquisition of Onan. Its products are associated particularly with recreational vehicles, marine applications, commercial mobility, and other mobile or compact power needs. Cummins has consolidated broader power-systems branding while retaining Onan as a recognizable product line in selected markets.

  • Turbocharging

    Holset turbochargers

    Holset turbochargers are developed by Cummins Turbo Technologies for diesel engines and other heavy-duty power applications. The Holset name originated with the British Holset Engineering company acquired by Cummins in 1973. Products support engine air management and power density across commercial vehicles, industrial equipment, and other demanding applications.

  • Filtration and maintenance components

    Fleetguard filtration

    Fleetguard is Cummins’ filtration brand for air, fuel, hydraulic, and lubricating-fluid filtration, along with related chemicals and exhaust-system products. The portfolio supports Cummins engines and equipment from other manufacturers. Its value proposition is closely tied to contamination control, component protection, maintenance intervals, and the reliability of heavy-duty equipment.

  • Zero-emission power technology · 2023

    Accelera

    Accelera by Cummins is the company’s zero-emission technology business. It develops batteries, hydrogen fuel cells, electrolyzers, electric axles, traction systems, and related propulsion or energy technologies. The unit is intended to serve commercial vehicles and industrial customers moving toward electrification and hydrogen, complementing rather than immediately replacing Cummins’ established combustion-engine activities.

Controversies

  • 1998

    Clean Air Act emissions-control case

    The EPA alleged that Cummins and other diesel-engine manufacturers used electronic controls that behaved differently during certification testing and normal highway operation, reducing emissions controls outside the laboratory. Cummins was included in fines totaling $83.4 million across the manufacturers, alongside commitments to corrective action and additional spending.

    Source

Read more

Marketing campaigns

  • 2022Investing in America clean-energy initiative

    United States

    Cummins announced a clean-energy investment initiative focused on technologies including electrolyzers and hydrogen-related systems. The initiative received public attention when President Joe Biden visited the company’s Fridley, Minnesota plant during an Investing in America tour.

    Outcome. Supported Cummins’ public positioning as a supplier of clean-energy and hydrogen technologies.

    Source

Brand decisions

  • 2023

    Rebrand New Power as Accelera by CumminsStrategy

    Background

    Cummins needed a clearer identity for its battery, hydrogen, electric-propulsion, and electrolyzer activities as commercial customers evaluated alternatives to conventional engines.

    Action taken

    The company renamed its New Power business Accelera by Cummins and grouped its zero-emission technologies under the new identity.

    Aftermath

    Accelera became the principal public-facing brand for Cummins’ zero-emission power technology activities.

    Source

  • 2022

    Acquire Jacobs Vehicle SystemsM&A

    Background

    Engine braking and variable valve actuation technologies remained relevant to heavy-duty engine performance and control.

    Action taken

    Cummins acquired Jacobs Vehicle Systems, reconnecting the business with technology historically associated with Clessie Cummins’ engine-brake work.

    Aftermath

    Cummins expanded its valvetrain and engine-braking capabilities, while continuing to use the Jacobs name for related products.

    Source

  • 2017

    Sell mobile power-generation assets to United RentalsM&A

    Background

    Cummins continued reshaping its power business and distribution of mobile-generation equipment.

    Action taken

    United Rentals acquired all mobile power-generation assets from Cummins, with some employees transferring to support customer and fleet continuity.

    Aftermath

    United Rentals added the assets to its equipment-rental platform while Cummins retained broader power-generation capabilities.

    Source

  • 1986

    Begin acquisition of OnanM&A

    Background

    Cummins sought to expand beyond engines into integrated power generation and mobile electrical systems.

    Action taken

    Cummins began acquiring Onan and completed the transaction in 1992.

    Aftermath

    Onan products became part of Cummins’ power-generation portfolio and retained recognition in recreational-vehicle and mobile-generator markets.

    Source

  • 1973

    Acquire Holset EngineeringM&A

    Background

    Turbocharging was becoming increasingly important to diesel-engine performance and efficiency, particularly in commercial and industrial applications.

    Action taken

    Cummins acquired the British turbocharger manufacturer Holset Engineering and later operated the activity as Cummins Turbo Technologies.

    Aftermath

    Holset remained a product brand and became a significant part of Cummins’ global component portfolio.

    Source

Recent events

  • Unconfirmed

    Cummins launches S29 mining engine[3]

    Cummins launched its new S29 mining engine in Chongqing. The company said global supply is planned to begin in mid-2027.

  • Reported

    Cummins announces agreement to acquire Meritor[4]

    Cummins announced that it will acquire Meritor for approximately $3.7 billion. The deal is subject to customary closing conditions, applicable regulatory approvals and Meritor shareholder approval, and was expected to close by the end of the calendar year.

  • Reported

    Cummins announces fuel-agnostic engine platforms[5]

    Cummins announced an expansion of its powertrain platforms using a range of lower-carbon fuel types. The announced platforms share common engine architectures and are optimized for different fuels.

  • Unconfirmed

    Reported

    Cummins completes acquisition of 50% of Momentum Fuel Technologies[6]

    Cummins and Rush Enterprises announced the closure of Cummins’ acquisition of a 50% equity interest in Momentum Fuel Technologies from Rush.

  • Reported

    Cummins and Sinopec announce hydrogen joint venture[7]

    Cummins and China Petrochemical Corporation announced the formation of a 50:50 joint venture, Cummins Enze (Guangdong) Hydrogen Technology, to develop green hydrogen through technological innovation, research and development, and manufacturing capacity.

  • Reported

    Valvoline receives Cummins supplier recognition award[8]

    Valvoline received Cummins' 2021 Global Supplier Recognition Award in the category of Global Best Safety Practices, indirect sourcing.

  • Reported

    International and Cummins introduce over-the-air X15 engine calibrations[9]

    International and Cummins introduced over-the-air approved engine calibrations and programmable parameters for Cummins X15 engines through Cummins digital applications and Navistar's OnCommand Connection telematics.

  • Reported

    Cummins and Iberdrola partner on Spanish electrolyzer plant[10]

    Cummins announced a partnership with Iberdrola for a gigawatt electrolyzer plant in Spain to produce green hydrogen. The companies signed an agreement to accelerate business opportunities in the Iberian electrolyzer market.

  • Reported

    International Truck announces upcoming over-the-air engine calibrations[11]

    International Truck announced the upcoming availability of Cummins Connected Software Updates and programmable trim parameters through Navistar's OnCommand Connection portal, enabling over-the-air calibrations for Cummins X15 engines on eligible vehicles.

  • Reported

    Cummins launches QSK60 EPA Tier 4 / IMO III[12]

    Cummins launched the QSK60 EPA Tier 4 / IMO III at its marine virtual showcase. The solution pairs the QSK60 engine with a Tier 4-compliant SCR aftertreatment system for commercial marine markets in North America.

Read more(22)

Sources23 sources

  1. 1Cumminsen.wikipedia.org
  2. 2Cummins corporate websitecummins.com
  3. 3康明斯发布全新S29矿用发动机k.sina.com.cn
  4. 4Cummins 宣布收购 Meritor 的协议dbusiness.com
  5. 5康明斯宣布推出燃料无关型发动机平台thetrucker.com
  6. 6Cummins完成对Momentum Fuel Technologies 50%股权的收购thetrucker.com
  7. 7康明斯与中国石化宣布成立氢能合资企业constructionequipment.com
  8. 8Valvoline获得Cummins供应商认可奖prnewswire.com
  9. 9International与Cummins推出X15发动机空中校准功能constructionequipment.com
  10. 10康明斯与Iberdrola合作建设西班牙电解槽工厂finanznachrichten.de
  11. 11International Truck宣布即将推出无线发动机标定功能prnewswire.com
  12. 12康明斯推出 QSK60 EPA Tier 4 / IMO IIImarinelink.com
  13. 13Cummins更新Stage V B6.7发动机khl.com
  14. 14康明斯与戴姆勒卡车宣布发动机开发合作insideindianabusiness.com
  15. 15福田汽车与康明斯达成协议成立排放处理系统合资企业news.21-sun.com
  16. 16康明斯与NPROXX宣布成立储氢合资公司news.21-sun.com
  17. 17康明斯宣布任命Amy Davis领导新能源动力业务finance.sina.com.cn
  18. 18康明斯获约翰迪尔供应商项目最高合作伙伴评级post-journal.com
  19. 19康明斯暂停其Walesboro发动机工厂生产wishtv.com
  20. 20康明斯暂停威尔斯伯勒发动机工厂生产insideindianabusiness.com
  21. 21康明斯暂时关闭印第安纳州工厂finance.yahoo.com
  22. 22康明斯与徐工签署战略合作协议finance.sina.com.cn
  23. 23康明斯完成对Hydrogenics的收购industryweek.com

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