A test method for a vehicle powertrain includes, during a first test in which dynamic engine torque from a powertrain drives a vehicle on a road, recording throttle position or accelerator pedal position to define a throttle schedule, and recording engine speed to define an engine speed schedule. The test method further includes, during a second test of a vehicle engine, controlling a dynamometer and the vehicle engine according to the engine speed schedule and throttle schedule to reproduce the dynamic engine torque.

A heat insulation plate (25) is interposed between a coupling (21) and an adapter flange (22) in a main shaft (6) of a dynamometer (3). A torque meter (24) is disposed between a coupling flange (23) that serves as a test-piece connection surface (56) and the adapter flange (22). To surround a periphery of these, a cover (7) is provided. An air conditioner utilizing a refrigeration cycle supplies a cold wind to an inside space of the cover (7). The heat insulation plate (25) suppresses heat transmission from an electric motor of the dynamometer (3) to the torque meter (24). Therefore, the torque meter (24) is effectively cooled by the cold wind.

To provide an engine test apparatus and method, which can easily enhance the test accuracy. The engine test apparatus 10 of the present invention includes: a dynamometer 14, which applies torque to an output shaft of an engine 12 via a shaft member 32; a torque meter 36, which is disposed on the shaft member 32 and measures torque; and a control device 20, which computes a torque command value using a rotational frequency feedback value in order to apply feedback control based on a rotational frequency to the dynamometer 14. The control device 20 subtracts a value measured by the torque meter 14 from the torque command value to find a correction torque command value and controls the dynamometer 14 using the correction torque command value.

A system for testing an engine, the engine including, a drive shaft, and a fluid circulation subsystem, the fluid circulation subsystem having at least one heat exchanger, and a fresh water pump (engine auxiliary water pump). The portable engine test tool can couple to the engine flywheel housing or output shaft of the transmission and can use the fresh water pump of an engine to provide water to an attached or integrated dynamometer and provide braking force to such. In some embodiments the portable engine testing system can use a fresh water supply reservoir.

A method for testing power of an electric drive system includes setting the electric motor of the electric drive system to a desired speed and applying a brake load to the system. The method also includes increasing the brake load until an engine of the electric drive system is fully loaded. After the engine is fully loaded, the method includes maintaining the brake load until the acceleration remains between the upper predetermined threshold and the lower predetermined threshold for the predetermined period of time, which indicates that the engine has stabilized at full power. Once the engine is at full power, the commanded power of the electric drive system required for stabilizing the engine at full power is averaged, and the average power is compared to a predetermined pass/fail threshold to determine if the electric drive system has sufficient power.

There has been a problem with operability when performing inertia verification, due to the fact that a setting window and a measurement result window are different. A setting display function section to set a setting value for measurement and a measurement result display function section that displays a result measured on the basis of the setting value are provided in one window on a display screen of an inertia verification device. The setting display function section has a setting value indicating section that indicates mechanical inertia, an operation condition setting section and a progress indicating section. The measurement result display function section has a monitor window indicating section and a measurement result indicating section.

A propulsion system for a vehicle (10) includes a propulsor (102) for generating a thrust for the vehicle, a motor (104) operable with the propulsor for driving the propulsor, a motor mount (164) for mounting the motor in or to the vehicle, and a thrust measuring device (172). The thrust measuring device (172) includes a strain sensor (174) mounted to a structural component of at least one of the propulsor (102), the motor (104), or the motor (164) mount for directly measuring a strain on the structural component caused by the thrust generated by the propulsor during operation of the propulsion system.

A test kit is disclosed for testing an internal combustion engine with the engine kept at a fixed load condition. The test kit includes a test module programmed to execute a sequence of individual cylinder tests by measuring, in each cylinder test, a first engine performance value and providing an amount of fuel to one cylinder under test to differ from an amount of fuel provided to the rest of the plurality of cylinders. A further test module is programmed to measure, in an idle period between subsequent individual cylinder tests of the sequence of individual cylinder tests, a second engine performance value. This further test module is programmed to discard at least some of the individual cylinder tests if the second engine performance value measured by the further test module passes a threshold.

A vehicle dynamometer system for dynamometer testing of a vehicle, comprises at least one dynamometer test unit having a power source, the power source comprising an output shaft arranged for, in use, rotation with a vehicle wheel shaft, the system further comprising an adapter plate, said adapter plate comprising means for allowing fixed connection to a wheel hub of a wheel shaft being tested, said adapter plate further comprising means for allowing fixed connection of the adapter plate to the output shaft of said dynamometer test unit to thereby connect the output shaft of the dynamometer test unit to said wheel shaft. The adapter plate is designed such that, when fixedly connected to said wheel hub but disconnected from said dynamometer test unit, said adapter plate is arranged to support the vehicle to allow relocation of said vehicle while supported by said adapter plate.

Systems and methods for detecting at least one non-functional combustion chamber of an engine comprising a plurality of combustion chambers are described herein. In response to detecting a partial output power loss of the engine, one of the plurality of combustion chambers is assessed by monitoring an engine parameter indicative of an output power of the engine, determining whether a change in the engine parameter has occurred, when the change has occurred, determining that the combustion chamber is functional, and when no change has occurred, determining that the combustion chamber is non-functional and discontinuing fuel injection to the non-functional combustion chamber.