Horiba has been granted a patent for a method of testing an engine in a vehicle. The method involves cooling a driveline component using a separate bath, adjusting the component’s temperature to a target level, and operating the engine according to a mapping procedure. The bath is controlled to maintain the target temperature, while heat transfer from the component to the bath is measured to calculate torque or energy loss. GlobalData’s report on Horiba gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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Method for testing engine by controlling driveline component temperature
A recently granted patent (Publication Number: US11774326B2) describes a method for testing an engine in a vehicle. The method involves arranging a separate bath to cool a driveline component of the vehicle and adjusting the temperature of the component to a target temperature. Once the target temperature is achieved, the engine is operated according to a mapping procedure, and the bath is controlled to maintain the driveline component at the target temperature during the operation. Heat transfer from the driveline component to the bath is measured, and torque loss or energy loss of the component during the operation is calculated based on the heat transfer.
The method also includes measuring the heat transfer after the operation, and discontinuing the measuring when a predefined condition is met. Set points are determined to define a test schedule based on the mapping procedure and the torque loss or energy loss. While operating the engine according to the test schedule, torque and speed of a dynamometer arranged with the vehicle are recorded. Heat transfer from the driveline component to the bath is also measured during the operation. Total work performed by the engine is determined based on the torque, speed, and heat transfer, and total brake specific emissions from the engine are calculated based on the total work.
In another embodiment of the method, the engine is operated according to a test schedule after adjusting the temperature of the driveline component to the target temperature. The bath is controlled to maintain the temperature of the component at the target temperature during the operation. Heat transfer from the driveline component to the bath, as well as torque and speed of a dynamometer arranged with the vehicle, are measured during the operation. Torque loss or energy loss of the driveline component is calculated based on the heat transfer, and total work performed by the engine is determined based on the torque, speed, and heat transfer. Total brake specific emissions from the engine are then calculated based on the total work.
The patent provides a detailed method for testing engines in vehicles, allowing for the measurement of torque loss, energy loss, and brake specific emissions. This method can be valuable for evaluating engine performance and optimizing efficiency.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
