ADS-7000

Overview

Automatically operates a vehicle on a chassis dynamometer, using highly accurate servo tracking characteristics. Repeatability and accuracy exceed capabilities of the most experienced human drivers.

Designed for vehicle-emission, fuel-consumption, and emission-endurance testing, ADS-7000:

  • Drives nearly any vehicle type including CVT, LEV, direct-injection, hybrid, and electric vehicles
  • Operates manual and automatic-transmission vehicles
  • Automates testing under harsh or extreme conditions inappropriate for human drivers

Sophisticated "learning function" automatically determines the positional relationship between each actuator and the vehicle. Once data is stored, vehicles of the same model can be tested without performing the learning function.

Easy to install and operate, ADS 7000 includes a mechanical unit, control system, and remote controller. Actuators in the mechanical unit control the throttle, brake, clutch, gearshift, and ignition key.
The PC-based control system provides:

  • Editors for entering vehicle model data, driving schedules, gearshifts, ignition schedule, and other test parameters
  • Real-time graphic-numeric displays
  • Overall test sequence control

When integrated with measuring equipment, chassis dynamometer, and test cell computer, ADS-7000 allows fully automatic, unmanned laboratory operation.

Features

Applications 

  • Vehicle emissions and fuel consumption R&D testing on chassis dynamometers
  • Prolonged endurance and/or high-speed test runs
  • Testing under severe climatic conditions or other conditions which might exhaust or cause
    danger to a driver
  • Fully automatic, unmanned laboratory operation

Features  

  • Equal or superior to the most experienced human drivers in accuracy and repeatability
  • Equipped to handle nearly any vehicle:
    • CVT, LEV and direct-injection engine vehicles
    • Next generation hybrid and electric vehicles
    • Floor-shift manual or automatic-transmission vehicles M/T or A/T - up to seven gears
    • Right- or left-handed drive vehicles simply by rotating the arm 180°
  • Learning function automatically determines:
    • Relationship between gas pedal movement, speed, and acceleration
    • Relationship between brake stroke and deceleration
    • Relationship between gas pedal movement and engine RPM
    • Gas pedal play
  • Adjusts automatically to driving position and vehicle characteristics
  • Feed-forward control minimizes tracking lag. Feedback control compensates for moment-to-moment variations in vehicle characteristics

High-quality CRT displays

  • Analog gauges for engine revolution and vehicle speed
  • Strip-chart display of actual vs. scheduled speed
  • Over-speed and over-engine-revolution limits
  • Throttle, brake-pedal, and gear-shift positions
  • Vehicle speed errors
  • Easy-to-use editor allows creation of driving schedules. Gearshifts may be specified by time or speed
  • Provides AK interface to host computer over Ethernet LAN or RS-232
  • Installs in minutes in any type of vehicle
  • Improves efficiency of chassis laboratory facilities by allowing round-the-clock operation through fully automated, unmanned laboratory operation

System Modules

Mechanical Unit

Uses actuators to control throttle, brake, clutch, gearshift, and ignition key. Can be adjusted for left- or right-hand drive simply by rotating the arm 180°. Available in three configurations to support:

  • Both manual and automatic transmission vehicles
  • Only automatic transmission vehicles (2 types)

One person can quickly and easily install the unit with these steps:

  • Fasten mechanical unit to seat frame
  • Fasten actuators to gas, brake and clutch pedals
  • Fasten actuator to gearshift knob (adjusted to neutral)
  • Put key actuator in ignition keyhole
  • Connect RPM sensor to engine
  • Initiate automatic adjustment function (takes approximately 3 minutes)

Weighs approximately 30 kg (66 lbs) and can be separated into parts weighing less than 10 kg (22 lbs) each.

Control System

Provides over-all system control. Includes the following components in a 19-inch rack cabinet:

PC-based computer sets vehicle and test conditions, adjusts positional relationships of mechanical unit, and controls all operations from learning mode to test operation:

  • Easy-to-use editors allow entry of speed tables, shift patterns, command tables, and vehicle/engine parameters.
  • High-resolution CRT provides real-time displays during testing.
  • Communication to MEXA 7000, chassis dynamometer, and VETS vehicle emissions-test system allow fully automatic, unmanned operation of the test cell.

Controller controls actuators and test sequence, using feed-forward and feedback control.

DC servo driver provides power to servomotors for accelerator, brake, clutch, gearshift selector and starter.

Remote Controller
Performs installation adjustments and checks positional relationship of pedal actuators and gearshift lever. Includes these functions:

  • Mount
  • Auto Adjust
  • Manual Adjust
  • Adjust Check
  • Key Adjust
  • Gearshift check

Supported gearshift positions include N and 1 to 7 for manual transmission vehicles; N/D/D3/2/L for automatic transmission vehicles.

Manufactured by HORIBA

Specifications

ADS-7000 Basic Specifications
(See Options for additional features)

Main Components

Control system
CRT, keyboard, mouse
Infrared remote controller

Supported Vehicles

Standard passenger cars and light-duty trucks:

  • Gasoline, diesel, direct-injection engines
  • Spontaneous manifold, turbo charger, super charger
  • LEV

Configurations

  1. M/T and A/T vehicles:
     
    M/T vehicle: - from three - to seven-speed
    A/T vehicle: N/D/D3/2/L
    Operate Axis A, B, C, X, Y and S for accelerator, brake, gearshift and starter. 
     
  2. Only A/T vehicles:
     
    Floor-shift: N/D/D3/2/L
    Column-shift: N/D/D3/2/L
    Operate Axis A, B, Y and S for accelerator, brake, gearshift and starter.

Mechanical Unit

Weight: 30 kg / 66 lb. Separates into parts weighing
10 kg / 22 lb each.

Actuators

Stroke

Operating Force

Accelerator

200 mm

160 N

Brake

200 mm

220 N

Clutch

200 mm

410 N

Selector

200 mm

220 N

Gearshift

250 mm

220 N

Ignition Key Starting torque 170 N · cm; rated torque of 40 N · cm. Two-position operation: start and stop.

Installation Time

Approximately 4 minutes plus 3 minutes for automatic adjusting.

Functions

Driving Functions

Operates test-vehicle accelerator, clutch and brake pedals
Selects and shifts to each gear
Operates ignition key to start and stop engine

Control Modes

Vehicle speed vs. time (saved on hard disk)
Command table (saved on hard disk)
Stroke control of accelerator and brake

Control Method

Feed-forward + PI (proportional-plus-integral)

Learning Function

Auto Axis Adjust - Learns positions for gearshift and pedal stroke.

  

Manual Adjust - Learn positions for pedal stroke and manual gearshift.

  

Axis Adjust Check - Checks position for gearshift and pedals.

  

Engine Adjust - Learns start position of engaged clutch, acceleration, and engine revolution during start-up.

Standard Driving Schedules

EPA, ECE and Japanese driving schedules included with system.

Custom Driving Schedules

Created using graphical editor or learned by collecting data while driving vehicle on the chassis dynamometer.

  

Max. time: 8000 s
Min. time: 0.1 s
Max. number of gearshift changes: 4000

Editing functions

Vehicle data
Target speed pattern
Gearshifts - by speed or time
Start-up timing
Engine start and stop
External digital outputs

Safety Functions

Alarm and Emergency Stop - Throttles to zero, shifts gear to neutral position, disengages clutch, turns engine key off.

Power Failure - Completely releases throttle actuator.

Operating Procedures

  1. Select driving pattern w/function key or mouse.
  2. Start operation with function key, mouse or external command - ends automatically as programmed.
  3. Stop operation (if desired) with function key, mouse or external command.
  4. Once on-line, select driving pattern and start and stop operation with commands from the Host computer.

Operating Parameters

Ambient Conditions

Mechanical unit:
0-45°C (option: -10 to -20°C ), 30-90% RH, non-condensing

  

Control unit:
10-35°C, 45-80% RH, non-condensing

Power

200/220/230/240V AC, 50 Hz, single phase, 3.0 kVA or
110/115/120V AC, 60 Hz, single phase, 3.0 kVA

Inputs/Outputs

Frequency inputs for dynamometer speed and engine RPM
Digital and analog inputs for external control
Digital outputs for status
Analog output for chart recorder

Host Communication

RS-232C or Ethernet LAN using AK protocol:

  

Operation commands: 19 types
Inquiry commands: 29 types
Setting commands: 24 types

 

Options

 

  • Support for CVT, hybrid, and/or electric vehicles
  • 3-position operation of ignition key Ignition On, Ignition Off, and Engine On
  • Additional control modes
  • Manifold pressure control: PI variable gain control method
  • Engine revolution control: Feed-forward + PI control
  • Step-up control by speed, RPM, external signals
  • Manual Driving Unit - allows manual remote control of:
    • Accelerator - one rotation and ten rotation potentiometer (0-100%)
    • Brake - one rotation potentiometer (0-100%)
    • Gearshift - control with buttons
    • Ignition key - on and off control
    • Uninterruptible power supply

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