DS-3000 series
Combustion Analysis System






DS-3000 series will assist the R&D on increasing fuel efficiency with smaller engines.

With the ongoing research and development for improving combustion technologies (HCCI, EGR, etc.), new power sources (HEV and PHEV) and new fuels (biodiesel and natural gas) , development of more fuel-efficient and smaller engines are demanded. The DS-3000 series Engine Combustion Analyzer meets such growing expectations with the new, more powerful hardware.


Heat balance calculation function is newly added to the combustion analysis software. Enhancement of operability and calculation function of the software achieves the man-hour reduction and auto-measurement which are tasks to be solved in the combustion analysis operation. Supports Windows ® 10. NEW




  • Supports multiple types of fuels (liquid fuel, gas fuel)
  • Trend monitor and calculation of maximum cylinder pressure and IMEP in real time
  • Trend display in real-time
  • Supports start / stop combustion testing
  • Enable measurement without an encoder

Heat balance calculation function NEW

This function can calculate each work and loss corresponds to the fuel which is inserted to the combustion chamber. This function can output heat balance which should have been calculated manually.

Heat balance calculation function

Basic Assembly Software

DS-0328 Combustion Analysis Software

Basic software of combustion analysis including monitor function, measurement/calculation, and data storage.

The analysis result of a channel can be displayed in various types of graphs and lists on one window. Also, combination display of real-time trend data and intermittent trend data is available in the trend window. The following is an example of overlaying display, list display, trend display etc.
Basic combustion analysis can be performed easily just to click the buttons in order from the front on the simple operation measurement panel,




• The number of input pulses : 180/360/720/1800/3600 P/R

• Angular sampling resolution : 0.05/0.1/0.25/0.5/1.0°

• Input rotation range

0.05°: 10 to 8,000 r/min
0.1°: 10 to 16,000 r/min
0.25/0.5/1.0°: 10 to 25,000 r/min


• Setup specification: Environmental specification, engine specification, and fuel specification (composition weight ratio, element ratio)


All cylinder TDC auto correction function


Test mode: Manual, auto storage, starting test


Low-speed A/D input function
Environmental specification or other data can be measured by adding the "DS-0381 16ch Low-speed A/D input unit for combustion". The data is measured at every 45° to perform averaging processing. That is a representative value of the cycle.
Analog output function
Combustion calculation value is outputted as a voltage signal while operating calculation monitor by adding the "DS-0382 16ch D/A output unit for combustion".

Basic Assembly Hardware

Optional Software

DS-0328T Transient combustion analysis function

This application software is designed for multiple cycle (extended) measurement such as transient mode tests (JC08 and JE05). Efficient analysis can be achieved by processing only the areas specified by cycle trends in transient measurement.

Angular Resolution[ °] The maximum number of cycles Recording time (1,800 r/min average)
0.05 30,000 Approx. 30 min
0.1 60,000 Approx. 60 min
0.25 100,000 Approx. 110 min
0.5 100,000 Approx. 110 min
1.0 100,000 Approx. 110 min

* The above is the value of 4ch measurement.
The value will be changed depending on the content of calculation processing or the number of channels.

DS-0329 Knocking analysis function

Engine knocking is detected by monitoring for disturbance in cylinder pressure signals. Real-time calculations for knocking values and occurrence rates are available. Calculation of knocking and thresholds are monitored and displayed in trend and numerical forms.

DS-0335 SYNC measurement function

The DS-2000 series/ DS-3000 series combustion analysis system has supported the test of an engine which is included in a vehicle with idling stop system and hybrid system for many years by the engine start/stop test mode. In recent year, the mode tests (JC08 mode and NEDC mode) to nearly completed vehicles are increasing for performance evaluation. Selecting SYNC measurement mode as the measurement mode enables users to save measurement results obtained over the integration time from measurement start to end.
* DS-0329 Knocking analysis function cannot be used with this function at the same time.


DS-0336 Combustion Link function

Data communication through TCP/IP sockets enables the following processing. For example, synchronized recording of performance and combustion analysis data can be achieved by linking up to an engine bench.

  • • Measurement condition/calculation setup
  • • Measurement start/calculation result output
  • • Calculation monitor start/reading of calculation monitor value
  • • Specification setup ( environmental specification, engine specification, fuel specification )

DS-0337 Combustion noise analysis function

CPL (Cylinder Pressure Level) is calculated based on cylinder pressure while CNL (Combustion Noise Level) is calculated based on the magnitude of engine structural attenuation. Calculation monitoring, trend display and numerical display are available. Angle sampling that uses the same method as combustion analysis makes it possible to analyze combustion noise.

DS-0339 Knock expert function

Combustion pressure signal and sound pressure signal is used.

データ画面(DS-0339 ノックエキスパート機能)

• Measures sound pressure level in one microphone and detects up to 4 cylinders of knocking.

• Detection sensitivity is selectable from 5 levels depending on the sound pressure level.

• It is possible to change detection sensitivity, judgment level and then recalculate after measurement.

• Knocking level is judged to the user-specified knocking index (trace/light/heavy) by using in combination the Knocking level index of DS-0339 and the frequency processing function of the DS-0328.

* If you have any questions related to the purchase, please contact your nearest distributor or send us an e-mail (overseas@ONO SOKKI.co.jp).

DS-0349 Crank angle pulse cycle measurement function

This function measures crank angle pulse cycle and performs calculations. The above graph is an example to show the start testing data using absolute angle text file. (Start measurement function is provided as standard.)

DS-0358 Multi-stage injection calculation function


Measurement items related to fuel injection and combustion can be calculated. (Up to 10 stages)

Calculation items to each injection
Max. injection pressure, position of max. value, valve-opening pressure, fuel injection start /stop position, center of gravity position for rate of fuel injection, center of gravity position, ignition delay angle

Calculation items to each combustion
Center of gravity position for rate of heat release, center of gravity position, combustion start / stop position, cylinder pressure and gas temperature in a combustion chamber at combustion start position

DS-0360 Encoderless measurement function

A new algorithm based on real-time conversion into small number pulse (8 to 360 P/R) angle signals offers encoder-less stable measurements even during acceleration and deceleration.

Encoderless Measurement Setup

An encoder for crank angle detection is not required. Measurements are based on small number pulses such as crank angle signals for ECU (missing teeth pulse signals) and ring gears. Delay correction is also available.


• Angle pulse: 8 to 360 P/R
• Missing teeth: 0 to 4 P / location (1 P/R needed for 0 P/location)
NOTE: Please check carefully the specifications (magnitude and shape) of our angle pulse signal products before purchase.

DS-0361 Torque fluctuation analysis

(The above graphs have been created using absolute angle text files (in abs format).)


By using the cylinder pressure for each cylinder, friction/inertial- adjusted engine torque data is calculated.

DS-0363 Customizing calculation function

Calculation Customization Setup

Computation formulas can easily be created as required as part of basic combustion analysis functions.

DS-0383 CAN measurement function

Cycle-by-cycle analysis can be made by synchronizing combustion analysis data with CAN data, which is becoming increasingly important as the basis for automotive control.

Use with the OS-2000 series (Time-series data analysis software)

The combustion analysis software is now available to output the TDMS file which is applicable to ASAM file. The following data are stored in the TDMS file: actual measured angle axis data including in-cylinder pressure signal, TDC calculation data which is used to check the time difference of combustion calculation result (NMEP, combustion weight ratio position, etc.).
By importing the TDMS file to the OS-2000 series, the phenomenon of angle axis data is analyzed while checking the time axis difference of the combustion calculation result in OS-2000 series.
The OS-2000 can import the performance data file (.thd) measured by FAMS and ECU data (.mf4) measured by INCA made by ETAS corporation. Those data can be matched and analyzed with the combustion analysis data.

* TDMS file: ASAM applicable measurement data file consists of the layers of file/ group/ channel in the file format made by NI (National instruments) corporation.

Optional function and measurement unit

Optional function DS-3000
B version
A version
DS-0328T Transient Combustion analysis
DS-0329 Knocking analysis
DS-0335 SYNC measurement × × ×
DS-0337 Combustion noise analysis
DS-0339 Knock expert function × × ×
DS-0349 Crank angle pulse period measurement ×
DS-0358 Multi-stage injection calculation software
DS-0360 Encoderless measurement ○*1 ○*1 ×
DS-0361 Torque fluctuation analysis ×
DS-0363 Calculation customization function
DS-0383 CAN measurement*2 × × ×

*1: When the DS-2000 series is used as measurement unit, the accuracy decreases than the time when the DS-3000 series is used.

*2: Hardware option (VN1610 CAN interface) is required to use this function.


Optional hardware list

Model name Product name
DS-3284 Combustion Analysis Unit
DS-0380 4ch High-speed A/D unit for combustion
DS-0378 Pulse input unit for combustion
DS-0381 16ch Low-speed A/D unit for combustion
DS-0382 16ch D/A unit for combustion

Hardware specification

DS-0380 4ch High-speed A/D unit for combustion

The number of input channels 4 ch / unit (max.28 ch, up to 5 unit)
Input method Single-ended
Isolation Isolated between units (COM signal of 4 inputs in an unit is shared.)
Terminal type BNC terminal
Input impedance 1 MΩ
Coupling DC coupling
Input voltage range ±0.1/0.2/0.5/1.0/2.0/5.0/10.0 V
Level monitor LED -20 dB (green), -0.915 dB (red)
Offset voltage ±100 % voltage range F.S. (error: ±1.0 % or less)
A/D resolution 16-bit successive conversion type
Sampling frequency Max. 1 MHz
Data memory 56 MB/ch
Weight Approx. 900 g

DS-0378 Pulse input unit for combustion

Pulse input section
Input impedance 100 kΩ
Input method Single-ended
Isolation Non-isolated
Terminal type BNC terminal
Coupling AC or DC coupling
Input voltage range ±10 V
Absolute maximum input range ±45 V
Minimum input voltage 1.0 Vp-p
Monitor LED Normal signal (green) / abnormal signal (red)
Trigger level ±10 V, setup resolution 10-bit
Trigger slope + (rising), − (falling)
Isolation Isolated between 「1 P/R input, angle pulse input」「External start input」 and 「Status output」 (Common of 1 P/R input and angle pulse input is shared.)
External start input
Input format TTL or non-voltage contact signal
Internal pull-up resistor 100 kΩ connected to internal +5 V
Minimum pulse width 10 ms
Status output
Output format TTL
External start function BNC input terminal to start measurement by TTL level or non-voltage contact signal
Detection slope: Rising or falling
Weight Approx. 800 g

DS-0381 16ch Low-speed A/D unit for combustion

The number of input channels 16 ch / unit (max. 32 ch, up to 2 units)
Input method Single-ended
Isolation Non-isolated
Terminal shape D-SUB 37-pin
Input impedance 1 MΩ
Coupling DC coupling
Voltage range ±1.0/2.0/5.0/10.0 V
A/D resolution 16 bit
Sampling angle 45 °
Sampling method Multiplex method
Weight Approx. 800 g
Accessory BNC connector box, signal cable (1.5 m)

DS-0382 16ch D/A unit for combustion

The DS-0382 enables output of combustion analysis calculation data (Pi, Pmax etc.) as analog data. A single unit consists of 16 channels and is extendable for up to 32 channels.

The number of output channels 16 ch / unit (max. 32 ch, 2 units)
Output method Single-ended (GND common to each channel)
Isolation Non-isolated
Terminal shape D-SUB 37-pin (with external BNC connector box )
Output impedance 1 Ω or less
Load impedance 10 kΩ or more
Maximum output current ±1 mA
Output coupling DC coupling
Output voltage range ±10.0 V
D/A resolution 14-bit
Rising time 100 μs or less (time to settle within 10 % to 90 % of variation from −10 V to +10 V)
Weight Approx. 800 g
Accessory BNC connector box, signal cable (1.5 m)

DS-3284 Combustion analysis unit

AC power voltage 100 to 240 VAC
DC power voltage 10.5 to 16.5 V*1
Power consumption Approx. 27 to 67 W*2
Operating temperature range 0 to +40 ℃(non-isolated)
Storage temperature range −10 to +60 ℃
CE marking Conformed
The number of maximum units 9 units
PC interface USB 3.0 interface (USB 2.0 can also be used, however the speed of USB 3.0 is faster than USB 2.0.)
Outer dimensions 257 (W)×104 to 344 (H)×182 (D) mm*2
Weight Approx. 3.1 to 8.5 kg*2

Note: 150W type AC adapter is required in 5 or more units. (Cooling fan is attached.)
*1:10.5 to 16.5 V in 4 units
*2:The value will be changed depending on the number of units.

Operating environment

CPU Intel® CoreTM i5 or more
Memory capacity 4 GB or more
Interface USB 3.0 interface (USB 2.0 can also be used, however the speed of USB 3.0 is faster than USB 2.0.)
OS Microsoft® Windows® 7 Ultimate/Professional (64/32-bit version)
Microsoft® Windows® 10 Professional (64/32-bit version)
Microsoft.NET Framework 3.5 or later is supported.

※ Microsoft® Windows® are registered trademarks of Microsoft Corporation in the United States and other countries.
Other product names and model names are trademarks or registered trademarks of each individual company. The copyrights are reserved by each individual company.

Crank angle detector (option)


CP-5110B Fiber optic crank angle detector + Slit disk (CP-5120/5130) + Crank angle amplifier (CA-6000B)

CP-5730 Fiber optic crank angle detector ( Slit disk and detector all in one type) + Crank angle amplifier (CA-6000B)


Crank angle detector
CP-5110B (Slit disk is required.)
Crank angle detector
CP-5730 (Slit disk is included.)
Crank angle amplifier



    Optical fiber offering high resistance to noise

    Improved optical system offering reliable detection

    Compact and lightweight, so can be used even on engines with heavy vibration

    Designed to match your settings

    No bearings, therefore light rotational load

    Optical fiber offering high resistance to noise

    Improved optical system offering reliable detection

    Weight reduction of the rotating parts and structural improvement of the rotation stops have increased the vibration resistance

    High-speed bearings offering smooth operation

    Receives signals (Phase A: angle signals, 1 P/R: reference signals) from a crank angle detector; Sends out TTL level or analog signals

    Crank angle detector sensitivity matching through an external volume

    High noise resistance corresponding to the CE marking requirements

    Adaptable to different crank angle detectors with the flick of a switch



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