Hybrid wheel loader
AssigneeHitachi Construction Machinery Co., Ltd.
InventorsSatoru Kaneko, Takashi Ikimi, Hidekazu Moriki, Noritaka Ito, Hiroaki Yanagimoto
Life of this patent
Estimating the term…
Abstract
[Problem] To provide a hybrid wheel loader capable of highly efficient and stable supply of motive power. [Solution] A hybrid wheel loader including: a front work machine (5) provided at the front of a vehicle; power sources including an engine (1) and an electric storage device; and a hybrid control device (20) which controls output of these power sources; characterized in that: a capacitor (11) is provided as the electric storage device; and the hybrid control device makes control to decrease a voltage of the capacitor in accordance with increase of energy held by the vehicle.
Claims7
A hybrid wheel loader comprising:
- a front work machine provided at the front of a vehicle;
- power sources including an engine, a motor/generator and an electric storage device;
- and s hybrid control device which controls outputs of the power sources;
- characterized in that:
- a capacitor is provided as the electric storage device;
- the hybrid control device makes control to decrease a voltage of the capacitor in accordance with increase of energy held by the vehicle;
- and
- the energy held by the vehicle consists of kinetic energy based on a traveling speed of a vehicle body, or energy obtained by adding at least one of potential energy based on height of a bucket of the front work machine and rotational energy based on rotation speeds of the engine and the motor/generator to the kinetic energy.
A hybrid wheel loader comprising:
- a front work machine provided at the front of a vehicle;
- power sources including an engine, a motor/generator and an electric storage device;
- and a hybrid control device which controls outputs of the power sources;
- characterized in that:
- a capacitor is provided as the electric storage device;
- the hybrid control device makes control to decrease a voltage of the capacitor in accordance with the increase of energy held by the vehicle;
- and
- the hybrid control device makes control to obtain different characteristics in the voltage of the capacitor relative to the energy held by the vehicle between a normal operation mode in which normal work operation is carried out and a vehicle standby mode in which the vehicle is kept standby.
Dependencies are inferred from the claim text.