Generally, in order to evaluate the vehicle's driving performance, traditional test methods have been used to measure the vehicle's acceleration performance. In addition to testing the acceleration performance of the vehicle, a lot of driving performance evaluation tests that use the accelerator pedal control quantitatively, precisely and repeatedly are required. For the test driver, it was very difficult to maintain the accelerator pedal opening quantitatively and accurately, or to control the accelerator opening change speed uniformly, or to repeatedly perform such an operation constantly.

Therefore, there is a need for a drive controller that can control the vehicle's accelerator pedal opening accurately and quantitatively with excellent repeatability. These drive controllers can perform accelerator pedal opening control repeatedly according to the specified mode, or in some cases, including brake pedal control.

The drive controller is essential for a chassis dynamo test that repeatedly drives a predetermined drive curve or a repeated driving test according to a specified mode on a proving ground. Instead of using an accelerator and brake pedal control by a test driver, an accurate, repeatable accelerator pedal controller is used now to perform driving performance evaluation tests with more accurate and repeatable reproducibility.

The VMS3400 generates exactly the same type of signal as the signal input from the APS/BPS and sends it to the ECU. The ECU recognizes this signal as an accelerator and brake pedal signal operated by the driver and controls the vehicle normally. 

In addition to the general analog type, VMS3400 provides APS/BPS connection function of SENT type signal. which APS/BPS connection method is impossible, VMS3400 provides Pedal Robot which can control Accelerator and Brake pedal. VMS3400 can be used in combination with APS/BPS signal control method.

Key Features

The VMS 3400 is a drive controller and drive performance measuring device with built-in 100Hz GPS and APS/BPS controller which replaces the role of the driver in controlling the accelerator and brake pedal.

The VMS3400 provides a typical APS/BPS connector and allows easy APS/BPS sensor connectivity, simplifying the test preparation and installation process.

The VMS3400 automatically performs tests according to test items, measures and stores data as the test progresses, and automatically classifies and manages test results data.

The driving controller can control the accelerator and brake pedals of the vehicle by simulating signals from the accelerator pedal sensor (APS) and brake pedal sensor (BPS) that are identical to the actual vehicle, thereby driving the vehicle. To start testing with the driving controller, first disconnect the APS/BPS cable connector from the vehicle pedal opening sensor to the ECU and connect it to the APS/BPS port of the VMS 3400.

Although the VMS 3400 is equipped with an APS/BPS controller and a 100Hz GPS, it only minimizes the device size by implementing necessary functions. The VMS 3400 can control the speed of the test vehicle. This function can be used to automatically drive the vehicle according to a pre stored driving curve, and the pedal robot can also serve as a driving robot for the speed controller of the test vehicle traveling on the chassis generator. The pedal robot provided by VMS 3400 is connected to VMS 3400 for automatic repetitive driving of previously stored driving curves. After installing the pedal robot, the driver can also manually operate it.

Drive Controller

Since the VMS3400 performs vehicle speed control by controlling APS/BPS signals, it is a perfect speed controller for chassis dynamo testing.

The VMS3400 can automatically control the "acceleration and brake pedal" according to the target speed, so it is a drive controller device that can precisely control the speed at a predetermined target speed and time.

The VMS3400 reduces the driver's speed control difficulties, maintains the best speed control, and improves repeatability.

The speed control function can be used on both chassis dyno and proving ground and allows the vehicle to run repeatedly according to a predetermined target speed. The same drive curve can be executed indefinitely.

The APS/BPS controller shows speed control in the full section. However, VMS3400 provides the option to use the Pedal Actuator to control the speed in the full section by using Accelerator and Brake Pedal control of the vehicle.

Vehicle performance test

As an automated vehicle performance test device VMS3400 is effectively applicable for automated performance test.As 100Hz GPS speed sensor and APS/BPS controller combined test device, VMS3400 is a device which can perform fully automatic and accurately repeatable tests.

High-performance controller VMS3400 offers real-time data collection performance and also the data analysis is being done with ActiveDC program to review test results.By automating the test procedure, VMS3400 minimized number of test equipment operation and after completionof test, result notification could be shown immediately.

Application features

All driving performance test conducted by this single device with 100Hz GPS speed sensor and APS/BPS controller.

Accurate repeatability test with very precise APS/BPS control. Greatly reduced Equipment operations by automated test procedure. Results can be checked immediately after completing the test.

Test application evaluations

Driving performance evaluation under various APS/BPS and BPS operating conditions 

Acceleration and brake pedal on/off test

Constant Accelerator and brake pedal position control

Constant Acceleration and decelleration control 

Accelerator and brake pedal rate control

Combination mode test

Speed control

Engine RPM control