Hydraulic turbocharged engine with automatic start-stop

Abstract

The invention relates to a hydraulic turbocharged engine with automatic start-stop. Methods and systems are provided for a vehicle engine including a turbocharger coupled to a hydraulic pump and a hydraulic accumulator. In one example, a method may include, in response to the vehicle coming to a stop, supplying pressure to a hydraulic braking system of the vehicle from the accumulator coupled to ahydraulic pump coupled to a shaft of a turbocharger of an engine installed in the vehicle, and automatically shutting down the engine while the vehicle is stopped.

Description

technical field [0001] The present invention generally relates to methods and systems for hydraulic braking systems that allow the use of automatic engine start-stop technology on hydraulic hybrid vehicles. Background technique [0002] As emissions regulations continue to be introduced, the demand for more energy-efficient vehicles is also increasing. To improve fuel economy, technologies such as automatic start-stop systems are on the rise. These start-stop systems automatically shut down the engine by stopping fuel delivery to the combustion chamber when the vehicle is stopped and idling (a major source of fuel waste). Long periods of idling are typical for delivery vehicles, taxis and commuter vehicles in severe traffic jams. During a temporary engine shutdown, the engine restarts and resumes normal operation once the vehicle controller receives an indication from the operator of a torque request or other engine parameter requiring engine power (eg, low battery charge)...

AI Technical Summary

Problems solved by technology

In one example, the system described above requires the addition of a hydraulic pump motor of enormous size, which adds substantial cost, weight and complexity to the vehicle system, making it impractical to implement on most passenger vehicles

Images