Denso turbochargers, turbochargers by denso


denso Petrol engines 
denso Diesel engines 
denso Petrol fuel is injected as an air/fuel mixture into the combustion chamber and ignited by the spark from spark plugs. 

Diesel fuel is pressurised and injected into the combustion chamber through a fuel injector nozzle, just when the air in the chamber has been subjected to high pressure that it is hot enough to ignite the fuel spontaneously.

This pressurisation and injection is carried out by a Diesel Fuel Injection Pump. 

Excellent fuel economy and power underlie the popularity of diesel engines in trucks around the world. However, ongoing issues regarding the control of nitrogen oxides and other pollutants have limited the use of diesel power in passenger cars in the past. 

Europe has a large percentage of diesel powered passenger vehicles due in part to tax breaks and cheaper diesel prices in countries such as France and Italy. Another reason for their current popularity is the improvements in performance, quietness, economy and emission performance being released by carmakers. 

Diesel engines are becoming popular in Europe in a wider range of cars and classes, even sporty BMW coupes. The percentage of Diesel vehicles in the British new-car market is now more than 20%, it will never be as popular in Australia as it is in Europe but it will become more wide-spread in the next few years.


Structure of  denso Diesel Fuel Injection System
The Diesel Fuel Injection system consists of the following parts.

denso Fuel injection pump
Pressurises fuel to high pressure then sends it to the injection nozzle. 

denso Injection nozzle
Injects fuel into the combustion chamber (for direct injection) or pre-combustion (for indirect injection).

denso Feed pump
Sucks fuel from the fuel tank.

denso Fuel filter 
Filters the Diesel fuel. Some types of fuel tanks have a fuel sedimentor at the bottom of the filter to separate water content from the fuel.

denso High-pressure pipe
Sends fuel to the injection nozzle. The pipe is made of steel as it has to withstand high pressures.


Diesel fuel injection pumps are generally divided into two categories: 

denso Mechanical, denso Electronic

Mechanically controlled fuel injection pumps are available as:

In-line type 
Distributor type 
Electronically controlled fuel injection pumps are available as: 

In-line type 
Distributor type 
Common Rail type 
In-line Fuel Injection pumps have the same number of plungers as cylinders in the engine. They have been around the longest and include Camshaft-Less (PFR) types.

Distributor Fuel Injection pumps were designed to be lighter and smaller than in-line types. They inject and distribute fuel into each cylinder within one rotation of a single plunger.

The Common Rail type has a completely different injection method from conventional fuel injection pumps. It will become more common over time as it is instrumental in enabling Diesel systems to meet increasingly stringent emission regulations.

An electronically controlled fuel injection pump utilises a microcomputer to control fuel injection quantity and injection timing according to running conditions of the engine. Unlike conventional mechanical control, fuel injection quantity and injection timing are controlled electronically, thereby resulting in fine and accurate control. It can be referred to as Electronic Control Diesel or ECD.


For over 40 years denso has been designing and manufacturing Diesel Fuel Injection systems. Over this time a proven history of innovation, quality and reliability has been established.

denso developed the world’s first Common Rail Injection system for diesel truck engines. Our technology in this area earned a prestigious award in 1998 from the Japan Society of Mechanical Engineers.

denso leads the diesel fuel iniection industry in shortening the interval between the pilot and main injections for the Common Rail system. This reflects the outstanding precision of our injectors in controlling the quantity of fuel injected. The shorter the time interval between pilot and main injection, the higher the control of the fuel quantity injected into the engine.

denso Genuine diesel fuel iniection parts are designed and built specifically for your particular Diesel Fuel Injection system. They were designed in conjunction with your vehicle manufacturer for your vehicle model. The diesel fuel iniection system forms an integral part of your engine and it is important to assist ongoing function of the engine by the use of only genuine parts. 

denso diesel fuel iniection parts will be protected under warranty and will provide the reassurance that comes with using high quality genuine parts to ensure your vehicle remains reliable and safe.

The Authorised denso Service Dealer network are the only approved pump repairers trained by the manufacturer. Click on the link above to find out where your closest Authorised denso Dealer is located.


denso is among the top three producers of Diesel Fuel Injection systems and parts in the world.

denso is number two in Australia for sales of Diesel Fuel Injection systems.

Millions of denso Fuel Injection units are sold every year.

denso has been manufacturing Diesel Injection pumps since 1957.

50,000 denso Common Rail Injection systems have been supplied to Isuzu, Mitsubishi and Hino, for trucks sold in Japan, the United States and Taiwan. 

Toyota installed the denso ECD-U2P Common Rail system for passenger cars in about 8000 vehicles sold in Europe in 1999.


1957 First production of Diesel Fuel Injection systems (Bosch license) 
1977 VE Pump 
1981 Original In-Line Pump (NB Type) 
1985 Electronic Distribution Pump (V3) 
1987 Original In-Line Pump (NL Type) 
1995 Common Rail System for Truck (U2) 
1998 (V3 Advanced) (V3-ROM) 
1998 Distributor Type - Electronically controlled ECD-V4 
1998 ECD-V5 
1999 Common Rail System for Passenger Car (U2P) 


In-line Type: Middle & Large size trucks, agricultural machines and construction machines

Distributor Type: Small Engines, especially for engines of automobiles

Common Rail Type: Will become more widely used over time, especially where emission regulations are difficult to meet with other diesel fuel iniection types.


Original Equipment Manufacturers include :

Cummins Kubota 
Daihatsu Mazda 
Hino Mitsubishi 
Isuzu Nissan Diesel 
John Deere Toyota 
Komatsu Volvo 


Demands for continual improvements to increase exhaust gas cleaning, decrease fuel consumption and noise are increasing. To meet such requirements, electronically controlled injection pumps have been developed. 

denso is upgrading its Common Rail technology to comply with Europe’s upcoming EURO-4 emission regulations. The improvements include increasing the number of injections per combustion stroke to five, from the present two, and raising the maximum pressure to 180 megapascals, from the present 135 megapascals. The possibility of adopting piezoelectric actuators for the injectors is also being investigated. 


By 2003 denso will be producing approximately 160,000 Common Rail systems annually. The target volume is production of 1 million units per year by 2005.

Some industry analysts project sales of 12 million Diesel powered vehicles annually in Europe by 2010. Increased unit volume will heighten the importance of ensuring maximum reliability and service. Costs will need to decrease to accommodate the more standard use of Common Rail systems.