MBE 900 - Detroit

MBE 900
SCHOOl BUS
A RELIABLE AND DURABLE SCHOOL BUS ENGINE
TO WORK MORNING, NOON AND NIGHT WITHOUT A DAY OFF
When it comes to school buses, there are no shortcuts to durability,
is sold, serviced and supported by one of the most extensive engine
performance and passenger safety. That’s where the MBE 900
networks in the world including Detroit Diesel Distributors, Thomas
engine shines. The MBE 900 has proven itself to more than
Built Bus dealers and Freightliner dealers. This extensive network of
600,000 customers around the world and is available in a wide
authorized service outlets makes sure the parts you need are there
range of horsepower and torque ratings – up to 280 hp with 800
when you need them.
lb-ft of torque.
REDUCED OPERATING COSTS
HIGH SCORES FOR A HIGH-ACHIEVING VEHICLE
The MBE 900 engines are designed to reduce operations costs on
It’s no surprise that the MBE 900 gets great marks from drivers
even the most challenging routes. The electronically controlled
and passengers alike. Higher torque at lower RPM allows drivers to
SMART fuel system squeezes the most mileage possible out of
merge, pass and avoid undesirable traffic situations. The MBE 900,
each drop of fuel. The engine brake design maximizes engine
manufactured by Mercedes-Benz and Detroit Diesel, is reliable and
braking power, reducing wear on wheel brake components. And
dependable – important qualities for school transportation.
since long life is what you’re after, you can look forward to many
years of efficient operation before overhaul.
THE MBE 900 IS A TECHNICAL MASTERPIECE
From electronic engine management to high pressure injection and
REDUCED MAINTENANCE COSTS
advanced materials to a lightweight engine block, the MBE 900
Built to last, the MBE 900 service needs are truly minimal. Oil
delivers. In fact, the end result is a diesel power plant that’s easy to
changes were engineered to reach to 15,000 miles, reducing
drive, simple to maintain and virtually trouble-free and durable.
operating and maintenance expenses and minimizing downtime.
The accessory drive system utilizes an automatic belt tensioner.
THIS IS ONE SCHOOL BUS ENGINE YOU CAN’T AFFORD TO MISS
Operating and maintenance costs are minimized with intelligent,
state-of-the-art, computer-controlled performance and diagnostics.
And MBE 900 engines meet tough EPA07 environmental standards.
Most importantly, as a member of the growing DaimlerChrysler AG
family – the global leader in diesel engine development – the MBE 900
Oil and fuel filters are easily accessible for quicker service. Unique,
individually replaceable, fuel injection pumps and SMART injector
nozzles simplify service. And the on-board data logging unit flags
maintenance trouble spots and can provide fleets with dollar
savings management information on the spot.
HiGH-TECH GRiD HEATER
The MBE 900 is capable of starting unassisted in temperatures as low
as 5 degrees Fahrenheit. For colder temperature operation, down to
-13 degrees Fahrenheit, an optional high-tech grid heater controlled by DDEC
VI is available. The high-tech grid heater pre-heats air in the intake system
before it enters the engine during starting and initial warm-up. This device
reduces cranking time in cold weather to increase starter life, reduces white
smoke and offers peace of mind for those with precious cargo.
MAiNTENANCE-FREE ElECTROSTATiC BREATHER
DETROiT DiESEl ElECTRONiC CONTROl (DDEC) vi
A new electrostatic breather system removes oil from crankcase vapor
Detroit Diesel set the benchmark for diesel engine electronics. Now we’re
before it’s vented into the atmosphere. The system sends oil droplets back
raising the bar with the sixth generation DDEC VI electronic engine
to the sump where they can continue to serve the engine, reducing oil
management system. It employs a more powerful microprocessor,
consumption. And the best thing is, it requires no maintenance.
®
increased memory and enhanced diagnostics. The DDEC VI is capable of
monitoring and managing all engine functions, including the Aftertreatment
MUlTi-FUNCTiONAl FUEl FilTER
system required for 2007 emissions. Fuel injection is electronically
The MBE 900 now offers an optional multi-functional fuel filter containing
controlled to maximize fuel economy and DDEC VI also controls the high
primary and secondary filtration, a fuel priming valve and a fuel-water
tech grid heater that makes sure your MBE 900 starts even in the coldest
separator in one compact assembly. The unit may also be ordered with a
climates. DDEC VI is a key part of the strategy to achieve greater operating
hand priming pump, a water-in-fuel sensor and/or a fuel heater as optional
efficiency and cleaner exhaust emissions.
equipment.
DETROiT DiESEl DiAGNOSTiC liNk
Best in class engine software includes two components: Diagnostic Link
and DDEC Reports. Diagnostic Link allows you to read fault codes and
utilize the on-line trouble shooting guide. Fleet management data including fuel economy, equipment utilization, idle time and hard brake incidents
are provided by DDEC reports.
lOw EMiSSiONS
The days of noise and black clouds emitted from diesel engines are over.
Engineers dedicated time, effort and resources to make the 2007 MBE
900 cleaner and quieter. A 90% reduction in particulate matter emissions
and a 55% reduction in NOx makes the ride more comfortable for
passengers and benefits our environment too.
ENGiNE BRAkES
The MBE 900 features a standard engine brake with up to 215 braking
horsepower providing driver and passengers with safety and better vehicle
control, while saving wear and tear on regular service brakes. More
responsive handling is just one innovation we are constantly researching for
better safety.
MBE 900
REFINED EXHAUST SYSTEM
REFINED FUEL AND LUBRICANTS
EXHAUST AFTERTREATMENT SYSTEM
ULTRA LOW SULFUR DIESEL (ULSD) FUEL AND CJ-4 OIL
The biggest change to our 2007 engines is the addition of an exhaust
The 2007 MBE 900 is designed to run on ULSD fuel, which can contain no
Aftertreatment System, which replaces the muffler assembly in the exhaust
more than 15 ppm sulfur. ULSD fuel is necessary to avoid fouling the
system. The unit’s defining components are a Diesel Oxidation Catalyst
engine’s Aftertreatment System.
(DOC) and a Diesel Particulate Filter (DPF) that oxidizes – or burns – soot.
During normal highway operation, exhaust temperatures alone are usually
high enough to burn off accumulating soot – a process known as “passive
regeneration.” In low ambient temperatures, however, or in some stopand-go applications, the system needs a little help to regenerate, or clean
A new low ash oil formulation, designated CJ-4, is recommended for
EPA07 engines. CJ-4 oil contains less than 1.0 wt. % sulfated ash. Use of
higher ash engine oils will reduce the cleaning interval on the Diesel
Particulate Filter (DPF) system.
itself. This process is called “active regeneration.”
DOSER
The Aftertreatment System uses a “doser” to initiate active regeneration.
When the amount of soot inside reaches a certain level, the doser injects a
measured amount of diesel fuel into the exhaust flow, which will react with
the catalyst to raise the temperature to a point that enables regeneration.
There are two types of active regeneration: in-transit and stationary.
In-transit regeneration occurs when the school bus is in motion.
In cases when the vehicle driving cycle is insufficient for in-transit
active regeneration, stationary active regeneration is required. This is
performed when the school bus is parked and monitored by the driver or
a service technician.
INTAKE THROTTLE
The intake throttle also assists in the regeneration process. When
necessary, this device will limit the amount of air entering the engine,
thereby raising the exhaust temperature and facilitating regeneration.
MBE 900 Power Ratings
MBE 900 Engine General Specs
190 HP @ 2,200 RPM
520 lb-ft @ 1,200 RPM
Number of Cylinders
210 HP @ 2,200 RPM
520 lb-ft @ 1,200 RPM
Air System
230 HP @ 2,200 RPM
620 lb-ft @ 1,200 RPM
250 HP @ 2,200 RPM
660 lb-ft @ 1,200 RPM
260 HP @ 2,200 RPM
800 lb-ft @ 1,200 RPM*
280 HP @ 2,200 RPM
*Only available on the rear engine HDX.
800 lb-ft @ 1,200 RPM*
Control System
6/Inline
Turbocharged with
Air-to-Air charged Cooling
DDEC VI
Bore
4.17 in (106 mm)
Stroke
5.35 in (136 mm)
Displacement
Compression Ratio
Weight, Dry
439 cu in (7.26 liters)
18:1
1310 lbs (594 kg)
ENGINE
CHANGES FOR 2007
No question about it: The 2007 EPA diesel emissions mandate has been the most challenging engineering tasks Detroit Diesel
has confronted, demanding more time, effort and resources than any other single program in the past several decades. The
2007 MBE 900 engine is not only far cleaner than its predecessors – it’s stronger too.
UNAlTERED MAiNTENANCE SCHEDUlES,
UNMATCHED SERviCE AND wARRANTY
MAiNTENANCE iNTERvAlS
Maintenance Item
Miles
Engine Oil and Filter Change
every 15,000 miles
Fuel Filter Change
every 30,000 miles
Valve Lash Adjustment
every 75,000 miles
pARTS, SERviCE AND wARRANTY
Parts and service for the 2007 MBE 900 engine are available at more than 800 Detroit Diesel authorized service locations
throughout North America. Factory certified technicians know your MBE 900 inside and out and are ready to help. For roadside
assistance, technical support or locating the nearest service center, contact the Detroit Diesel Hotline at 1-800-445-1980.
STANDARD wARRANTY 1
MBE 900
1
Repair Charge to be Paid by Owner
Warranty Limitations (Whichever Occurs First)
Months
Miles/Hours
Parts
Labor
Towing
Engine
0 - 60
unlimited miles
6,000 hours
No Charge
No Charge
No Charge
Accessories
0 - 24
unlimited miles
6,000 hours
No Charge
No Charge
No Charge
SEE YOUR AUTHORIZED DETROIT DIESEL SERVICE OUTLET FOR A COPY OF THE WARRANTY PARCHMENT FOR COMPLETE DETAILS.
For more information, call 1-800-445-1980. www.detroitdiesel.com RP 1M, 6SA202 (0611)
Specifications are subject to change without notice. Detroit Diesel and the spinning arrows design are registered trademarks
of Detroit Diesel. © 2006, Freightliner LLC. All rights reserved. Detroit Diesel is a member of the Freightliner Group.
Freightliner LLC is a DaimlerChrysler company.