TAD 870 / 872 VE

Product catalog summary

Overview
The TAD870-873VE is a series of powerful, reliable, and economical off-road diesel engines developed by Volvo Penta. These engines are built on the Volvo in-line six concept, offering low cost of ownership, compact installation, durability, and low noise.

Key Features

Low Cost of Ownership: The engines feature world-class fuel efficiency and a reliable exhaust aftertreatment system, minimizing downtime and service intervals.
Compact Installation: The SCR technology does not require additional cooling capacity, and installation materials are available from Volvo Penta. Installation guidelines, drawings, and CAD models are accessible for ease of installation.
Durability and Low Noise: The engines are well-balanced for smooth operation with low noise, reducing the risk of downtime.
Power and Torque: Maximum power and torque are available at low RPM, resulting in low noise and fuel consumption.
Low Emissions: The engines comply with EU Stage IV / EPA Tier 4f emissions standards, thanks to efficient injection, robust design, optimized SCR technology, and cooled EGR.
Easy Service and Maintenance: Service points are easily accessible, with options for remote mounting of filters and service points.

Technical Description

Engine and Block: Features include a cast iron cylinder block, replaceable cylinder liners, valve guides, and valve seats, with an overhead camshaft and four valves per cylinder.
Lubrication System: Includes a full flow cartridge insert filter and a gear-driven lubricating oil pump.
Fuel System: Comprises a common rail, gear-driven fuel feed pump, fuel prefilter with water separator, and a manual feed pump on the prefilter.
Cooling System: Utilizes a belt-driven coolant pump with high efficiency.
Turbocharger: Equipped with a VGT turbo.
Electrical System: Managed by the Engine Management System 2 (EMS 2.3), optimizing engine performance with CAN SAE J1939 interface connectivity.
Exhaust Aftertreatment System: Achieves emission compliance through SCR and cooled EGR technology, with options for various DEF tanks and airless urea injection.

Technical Data

General Specifications: The engines are in-line 6-cylinder, 4-stroke with a bore of 110 mm and a stroke of 135 mm, displacing 7.7 liters.
Performance: Power ranges from 160 kW to 235 kW at 2200 RPM, with torque ranging from 1060 Nm to 1310 Nm.
Compliance: Engine performance aligns with ISO 3046, BS 5514, and DIN 6271 standards.

Components and Layout
The aftertreatment system includes components such as DEF tank, urea quality sensor, warm-up valve, supply module, temperature sensors, flexible hose, dosing module, SCR muffler, and NOx sensors.

Catalog excerpts

VOLVO PENTA INDUSTRIAL DIESEL TAD870-873VE is a powerful, reliable and economical off-road Diesel Engine range built on the Volvo in-line six concept. World class fuel efficiency combined with a reliable exhaust aftertreatment system gives high uptime as well as low cost of ownership. No downtime for regeneration or decreased service intervals. Compact and simple installation SCR technology selected by Volvo does not increase amount of cooling capacity needed. As optional equipment all material needed in order to install the engine can be ordered from Volvo Penta. Installation guidelines as well as drawings and CAD models are easy to access. The result is an engine and aftertreatment system that is easy to install. Long experince with SCR systems in combination with base engine development reduces risk of downtime. Wellbalanced to produce smooth operation with low noise. Maximum power and torque available at low rpm. As a result noice as well as fuel consumption is very low. Useful engine speed for the TAD870-873VE is due to power and torque layout very flexible. Efficient injection as well as robust engine design in combination with optimised SCR technology and a cooled EGR contributes to excellent combustion and low fuel consumption. TAD870-873 VE complies with EU Stage IV / EPA Tier 4f emissions. Easy service & maintenance Easily accessible service and maintenance points contribute to the ease of service of the engine. As optional equipment possible to remote mount filters and service points. Features & Benefits • Low cost of ownership and operation due to SCR technology • Proven and straight-forward design • Compact and simple installation • High power and torque available at low engine speed • Complies with EU Stage IV / EPA Tier 4f • Wide range of optional equipment, please see order specification • No regeneration needed Technical description Engine and block • Cast iron cylinder block • Replaceable cylinder liners • Replaceable valve guides and valve seats • Overhead camshaft and four valves per cylinder Lubrication system • Full flow cartridge insert filter • Gear type lubricating oil pump, gear driven Fuel system • Common rail • Gear driven fuel feed pump • Fuel prefilter with water separator and water in-fuel indicator / alarm • Fine fuel filter of cartridge, insert type • Manual feed pump on pre filter Cooling system • Belt driven coolant pump with high degree of efficiency Turbo charger • VGT - Turbo Electrical system • Engine Management System 2 (EMS 2.3), an electronically controlled processing system which optimizes engine performance. • The instruments and controls connect to the engine via the CAN SAE J1939 interface. Options available for engine control equipment. Exhaust aftertreatment system • Emission levels compliance through SCR and cooled EGR technology • Several DEF tanks available as options • Possibility to offer a wide range of installation material needed • Airless urea injection

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For details see Technical Data Main components, Principal layout The illustration shows the main components of the aftertreatment system and its piping connections. 1 DEF tank 2 Urea quality sensor 3 Warm-up valve 4 Supply Module (SM) 5 Temp sensor 6 Flexible hose (stainless) 7 Dosing Module (DM) 8 Temperature sensor 9 SCR muffler 10 NOx sensor, engine out 11 NOx sensor, system out Power Standards The engine performance corresponds to ISO 3046, BS 5514 and DIN 6271. The technical data applies to an engine without cooling fan and operating on a fuel with calorific value of 42.7 MJ/kg (18360 BTU/lb)...

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