HYBRID WORK MACHINE

摘要

A hybrid work machine includes: an engine controller (14) that controls rotational speed of an engine (7) in accordance with a target rotational speed input from an EC dial (31); an assist motor (10) that generates electricity using power of the engine (7); a hydraulic pump (6) operated using power of the engine and/or of the assist motor; and a vehicle body controller (11) that estimates power (Pe) the engine is required to output when a request to generate electricity is sent to the assist motor and permits the assist motor to generate electricity only when the engine power requirement is not greater than an electricity generation threshold value (Eth1). The electricity generation threshold value (Eth1) is determined based on the power and characteristics of energy loss of the engine (7).

主权项

1. A hybrid work machine comprising:
an engine; a motor generator for generating electricity by using power of the engine; a hydraulic pump operated by using the power of the engine and/or the motor generator; and a controller configured to estimate engine power requirement that is power required of the engine when a request to generate electricity is send to the motor generator, and permit the motor generator to generate electricity only when the engine power requirement is equal to or less than a preset threshold value.