Warm-up method for hybrid-type construction machine and hybrid-type construction machine
AssigneeSumitomo Heavy Industries, Ltd.
InventorsMasato Koga, Tetsuji Ono
Life of this patent
Estimating the term…
Abstract
When a hybrid-type construction machine including an electric power accumulator is started under a low-temperature environment, at first an ignition key of an engine is turned on to drive the engine. If the temperature of the electric power accumulator is lower than a predetermined temperature, the electric power accumulator is heated by driving the engine. Further, if the temperature of the electric power accumulator is lower than the predetermined temperature, the engine is driven to carry out a warm-up operation and a motor generator is driven to charging and discharge the electric power accumulator to thereby heat the electric power accumulator.
Claims11
A warm-up method for a hybrid-type construction machine, comprising:
- driving an engine by turning on an ignition key of the engine;
- and
- heating an electric power accumulator by driving the engine if a temperature of the electric power accumulator is lower than a predetermined temperature,
- wherein if the temperature of the electric power accumulator is lower than the predetermined temperature, the engine is driven to carry out a warm-up operation, and simultaneously a motor generator is driven to repeatedly charge or discharge the electric power accumulator to cause the electric power accumulator to generate heat,
- the motor generator is driven by the engine to charge the electric power accumulator through an inverter, a DC bus, and a voltage up-down converter, and
- the motor generator is driven to discharge the electric power accumulator through the inverter, the DC bus, and the voltage up-down converter by assisting the engine to activate a pump.
A hybrid-type construction machine warmed up by a warm-up method of driving an engine by turning on an ignition key of the engine and heating an electric power accumulator by driving the engine if a temperature of the electric power accumulator is lower than a predetermined temperature, the hybrid-type construction machine comprising:
- the engine assisted by a motor generator;
- the electric power accumulator configured to supply electric power to the motor generator;
- a motor being an electrical load;
- and
- a path configured to connect at least one of the engine and the motor to the electric power accumulator.
Dependencies are inferred from the claim text.