The Kubota Group is contributing to resolving global issues by expanding our environment-friendly products and services. We are working on initiatives that consider the entire value chain, from procurement of raw materials to product disposal.
Since it started production of the water-cooled horizontal-type oil engine Type A for agriculture and industry in 1922, Kubota has thoroughly pursued basic performance of industrial engines. Responding also to the increasingly tightened exhaust gas regulations of many countries in the world, Kubota engines have constantly satisfied the needs of the customers worldwide as the power source of various types of industrial machinery.
|Conformity to Exhaust Gas Regulations*2||Total production volume|
Kubota’s engine technologies have evolved through undergoing improvements to conform to the exhaust gas regulations, which have been increasingly tightened year by year worldwide. Engines are required not only to satisfy the exhaust gas regulations but also to meet various performance requirements related to fuel efficiency, durability, etc. Kubota has developed basic performance based on its combustion control technologies, and selected the optimal parameters for the shape, materials, hardness, toughness, and other characteristics of each of the hundreds of parts constituting the engine, thereby pursuing the comprehensive improvement of the quality.
Kubota’s engines have been highly evaluated for their compactness and high quality, boasting the largest share in the world market of industrial engines below 100 horsepower.
The following is the history of V3 Series, as the representative to show how the exhaust gas of Kubota engines have become cleaner.
|From 2004||From 2008||From 2012||From 2015|
|Specifications||―||EGR||EGR+ CRS+ DOC+ DPF||EGR+ CRS+ DOC+ DPF+ SCR|
|EPA Tier2||EPA Tier3||EPA Interim Tier4||EPA Tier4 Final|
* NOx (nitrogen oxides): Acidic substance that constitutes the cause of acid rain, bronchitis, etc.
HC (Hydrocarbon): is generated when mixture gas that was not burned due to incomplete combustion is discharged
PM (particulate matter): particulates generated in combustion, such as soot
Kubota’s engines contribute to the realization of comfortable and environment-friendly operations, as the power source of diverse and various industrial machinery. So far, Kubota has worked on increasing the engine output without changing their appearance and shape, and also improving the fuel consumption rate. It is important to improve the fuel consumption rate while satisfying the exhaust gas regulations.
|1999 Original model（V3300-TE）||2015 Latest model（V3800-TIEF4）|
(kW)Fuel consumption rate*1
|Improvements||(1) Output increased
Bore diameter*2 ×
|(2) Changed combustion
|Swirl chamber type (mechanical type)||Direct injection type (electronic control type)|
|(3) Compliant with
|Conforming to EPA Tier1
|Conforming to EPA Tier4 Final
(EGR+ CRS+ DOC+ DPF+ SCR)
*1 Fuel consumption rate during rated output
*2 Cylinder internal diameter