Diesel Systems

Diesel Systems
Common Rail System CRSN Baseline for
medium- and heavy-duty off-highway applications
The CRSN Baseline Systems are full-featured Common
Rail Systems for medium- and heavy-duty off-highway
Customer benefits
(OHW) applications. They have been specifically

Optimized performance under all environmental designed based on the requirements of
conditions
the Chinese market. All system components are

Contributes towards achieving future emission manufactured locally.
legislation (e.g. Tier 3, Tier 4 interim/final)

High power/torque even at low engine speeds
In contrast to mechanical systems that build up

Optimized fuel efficiency and reduced noise
pressure for each injection individually, the Common

Easy integration into existing and future engine Rail System decouples the fuel-pressure generation
platforms
from the actual fuel-injection process, which enables

Fast response to transient operation conditions
high-pressure generation even at low engine speed

Limp-home operation
and thus lowers fuel consumption and emissions

Qualified systems with up to 8,000 hours
while offering higher torque. In addition, the intelligent
lifetime even at high percentage of full-load electronic control unit of the Common Rail System
operation
supports flexible software functionality development

Optimized robustness for OHW applications
based on customer-specific requirements.
Customer benefits: CRSN2-16-BL
Possible applications

Contributes towards achieving Tier 3,
The CRSN Baseline system family can be applied in the
Tier 4 interim
off-highway sector such as agricultural, construction

Customized for China
and mining machines, marine applications and power

Localized system
generators.
Customer benefits: CRSN3-18-BL
Operating principle

Contributes towards achieving Tier 4 interim/final
The Common Rail System family for off-highway

Customized for China
applications has been developed on the basis of

Localized system
proven commercial-vehicle system components.
In adapting it for off-highway operation, we have
specifically taken into account critical operation
conditions with long periods of full-load operation.
Anti-wear measures for the hydraulic components
ensure a lifetime of up to 8,000 operating hours
even when using fuel with low lubricity.
Diesel Systems | Common Rail System CRSN Baseline for medium- and heavy-duty off-highway applications
System design
Technical features: CRSN2-16-BL
Max. system pressure
1,600 bar
The locally developed CRS2 Baseline systems con-
Number of injections
Lifetime
Engine power
3 – 4
6,000 – 8,000 h
sist of a high-pressure pump, the high-pressure rail,
solenoid injectors, and an electronic control unit.
200 – 400 kW (6 cyl.)
Gear ratio 1/2 – 3/2
Axial force capable
Mounting of the pump
Lubrication of the pump
Pre-supply pump
Emission target
The systems can be applied with different high-pressure pumps CB28, CPN2 or CP4 with 1,600 bar or
1,800 bar system pressure.
Oil (CB28, CPN2), fuel (CP4)
Vane pump, gear pump
Tier 3, Tier 4 interim
The hot forged high-pressure rail has a two-stage
pressure limiting valve (PLV) which protects the system
Technical features: CRSN3-18-BL
from overpressure and offers limp-home operation.
Max. system pressure
1,800 bar
Number of injections
Lifetime
Engine power
3 – 5
6,000 – 8,000 h
The CRIN2-16-BL injector has a high-efficiency sole-
200 – 400 kW (6 cyl.)
Gear ratio 1/2 – 3/2
Axial force capable
noid valve and high-precision components. It accomplishes multiple injections per stroke. This multi-injec-
Oil (CB28, CPN2), fuel (CP4)
Vane pump, gear pump
Tier 4 interim/final
fuel consumption and subsequently CO2 output as
Mounting of the pump
Lubrication of the pump
Pre-supply pump
Emission target
tion capability contributes to a further reduction of
well as reduced noise and exhaust-gas emissions.
The CRIN3-18-BL injector allows further fuel savings.
It reduces the return flow to the low-pressure circuit.
System components: CRSN2-16-BL
This means the high-pressure pump has to deliver less
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2
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fuel and thus requires less driving power, which
increases the system efficiency. Since the injector’s
dimensions have not been changed, engine manufacturers can convert their current engines to the new,
higher-pressure system with low modification effort.
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5
6
All system functions are monitored and controlled by
the Electronic Diesel Control (EDC17). The EDC constantly monitors engine parameters and prevents the
1
CB28-16/2-OHW
2 CPN2-16/2-OHW
3
CP4/2-16-OHW
4 CRIN2-16-BL
5
HFRN-16 PLV
6 EDC17CV44/54
engine from damages by informing the operator and
delivering diagnostic support. The EDC can be programmed for different engine requirements without the
need of exchanging the fuel injection hardware, e.g.
different power rating, different torque curves and
fixed or variable speed. The EDC17 is suitable for
System components: CRSN3-18-BL
1
chassis mounting, optionally also for engine mounting.
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3
Outlook
A 2,000 bar system specifically designed for the
Chinese market is under development.
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5
6
Bosch Automotive Diesel Systems Co., Ltd.
17 Xinhua Road, New District,
Wuxi 214028, Jiangsu, P.R. China
Tel: +86 510 8533-3888
Fax: +86 510 8533-8000
1
CB28-18/2-OHW
2 CPN2-18/2-OHW
3
CP4/2-18-OHW
4 CRIN3-18-BL
5
HFRN-18 PLV
6 EDC17CV44/54
www.bosch.com.cn
www.future-with-diesel.cn
www.gonggui.com.cn
Printed in China
2 920 00P 0YV-RBCD/MKL-201211-En
© Robert Bosch GmbH 2012. All rights reserved, also regarding any disposal, exploitation, reproduction,
editing, distribution, as well as in the event of applications for industrial property rights