Work machine having a hydraulic liquid cooling and heating system
AssigneeVolvo Wheel Loader AB
InventorHalvar Sjunnesson
Life of this patent
Estimating the term…
Abstract
A work machine, such as a wheeled loader or dumper, has a cooling and heating system comprising a main line (2) arranged to contain a fluid, a first heat exchanger (4) which is connected to the main line (2), and a charge-air cooler (8) for cooling compressed charge air for an internal combustion engine (12) arranged in the machine, which charge-air cooler (8) is connected to the main line (2). A second heat exchanger (10) is connected to the main line (2) downstream of the charge-air cooler (8), to which second heat exchanger (10) a hydraulic liquid line (14) is connected, so that heat can be transferred between the fluid in the main line (2) and the hydraulic liquid in the hydraulic liquid line (14).
Claims12
A work machine having an internal combustion engine for driving the machine and at least one hydraulic cylinder, the machine having a cooling and heating system comprising:
- a main line for a cooling fluid connected for cooling the engine;
- a hydraulic liquid line for a hydraulic liquid connected for supplying the hydraulic cylinder with hydraulic liquid;
- a first heat exchanger coupled to the main line and the hydraulic liquid line for transferring heat between the cooling fluid in the main line and the hydraulic liquid in the hydraulic liquid line;
- a second heat exchanger coupled to the main line for heat exchange between the cooling fluid and air;
- a variable hydraulic liquid pump connected to the hydraulic liquid line, which hydraulic liquid pump is disposed so as to bring about a variable hydraulic liquid flow in the hydraulic liquid line;
- a first hydraulic motor connected to the hydraulic liquid line;
- a fan driven by the hydraulic motor and disposed so as to bring about an air flow through said second heat exchanger in order to cool the fluid in the main line;
- and
- a third heat exchanger connected to the hydraulic liquid line and to a lubrication oil line and at least one wheel axle of the machine connected to said third heat exchanger so that heat can be transferred between any lubrication oil in said lubrication oil line and said hydraulic liquid.
A work machine, comprising:
- an internal combustion engine configured to drive the machine;
- at least one hydraulic cylinder;
- and
- a cooling and heating system comprising
- a main line for a cooling fluid connected to the engine,
- a hydraulic liquid line for a hydraulic liquid connected to the hydraulic cylinder,
- a first heat exchanger coupled to the main line and the hydraulic liquid line for transferring heat between the cooling fluid in the main line and the hydraulic liquid in the hydraulic liquid line,
- a second heat exchanger coupled to the main line for heat exchange between the cooling fluid and air,
- a variable hydraulic liquid pump connected to the hydraulic liquid line and configured to bring a variable hydraulic liquid flow in the hydraulic liquid line,
- a first hydraulic motor connected to the hydraulic liquid line,
- a fan driven by the hydraulic motor and disposed to bring an air flow through said second heat exchanger in order to cool the fluid in the main line, and
- a third heat exchanger connected to the hydraulic liquid line and to a lubrication oil line and at least one wheel axle of the machine connected to said third heat exchanger so that heat can be transferred between any lubrication oil in said lubrication oil line and any hydraulic liquid in said hydraulic liquid line.
Dependencies are inferred from the claim text.