Provided is a construction machine allowing a deck to be compact while facilitating water supply to a urea tank and access to a grease supply device. The construction machine includes a hose reel for grease supply disposed on a front-side portion of a deck of an upper slewing body, and a urea tank 30 disposed rearward of the hose reel on the deck and stores urea water for exhaust gas purification. The urea tank has a front surface provided with a water inlet for resupplying urea water. The hose reel is disposed deviated from the water inlet widthwise of the upper slewing body. The water inlet has a distal end located on the front side of a rear end of the hose reel.

An oil supply structure which supplies lubricating oil to a portion to be lubricated in a casing, the oil supply structure comprises an opening portion provided on a wall portion of the casing which corresponds to a shaft end portion of a rotary shaft supported by a bearing in the casing, and an oil passage configured to provide communication from the opening portion to at least the bearing.

In hybrid electric vehicles having increased battery storage capacity and plug-in capability, electric-only operation of significant duration is available. To supplement lubrication for the electric and mechanical components provided in a fluid circuit by an engine-driven mechanical pump, an electric pump is provided in parallel to the mechanical pump. When the electric pump is operating, a diagnostic can be performed to determine system integrity. According to one embodiment, an actual quantity provide to the circuit is determined; an expected quantity is estimated; and a fault is determined when the actual and expected quantities differ by more than a predetermined amount. The fault may indicate a leak or plug in the fluid circuit or a failure of a component in the fluid circuit.

An oil supply system of a vehicle includes: a first pump generating a first quantity of oil to cool a driving motor of a hybrid vehicle; a second pump generating a second quantity of oil to lubricate a friction lubrication element of the hybrid vehicle; a flow channel switching valve selectively switching a flow channel of the first quantity of oil and a flow channel of the second quantity of oil to connect the flow channel of the first quantity of oil to the friction lubrication element or connect the flow channel of the second quantity of oil to the driving motor; and a controller controlling an operation of the flow channel switching valve to supply a portion of the first quantity of oil to the friction lubrication element or a portion of the second quantity of oil to the driving motor.

An auxiliary power unit (APU) oil quantity indication system and method provides a stable and accurate oil quantity indication during startup, mission duration and shutdown. The system determines a gulp value at various stages of operation, which is combined with a raw oil quantity indication to provide an indicated oil quantity.

A lubrication system including a drive fluid chamber and a lubricant chamber. A first movable member is movable from a first position to a second position within the drive fluid chamber in response to drive fluid pressure acting on the first movable member. A second movable member is movable between a first position and a second position within the lubricant chamber and is operatively coupled to the first movable member. A biasing member is positioned to bias the first movable member toward the first position. A relief valve is associated with the first movable member and, when the relief valve in an open state, the drive fluid pressure acting on the first movable member is reduced such that the biasing member moves the first movable member to the first position within the drive fluid chamber.

A system for controlling a variable oil pump is provided. The system includes a variable oil pump that varies a discharge pressure of oil and an actuator that is operated to vary the discharge pressure of the oil of the variable oil pump. A controller turns the actuator on or off based a relationship between an outdoor temperature and a cooling water temperature of an engine.

Disclosed are an oil circuit, an oil supply method for lubricating wheel-end electric drive axles, and a dual-circuit oil pump. The oil pump has a motor, first and second pumps with a common rotor shaft driven by the motor, and a seal mounted on the rotor shaft and configured to sealingly isolate the first pump from the second pump. The oil circuit design includes an oil pump, first and second oil filters, and first and second heat exchangers. From first and second housings each receiving a first and second wheel-end electric drive axle, respectively, a lubricating oil flows into a respective oil filter, flows into the oil pump after being filtered, is then pumped into the respective heat exchanger and cooled, and finally flows back into the respective housing.

An oil guidance arrangement for a transmission housing (1) of a vehicle includes at least one annular oil slinger (2) for collecting radially outward flowing oil. A guide area (3) for generating a laminar oil flow is closed in sections and is provided on a circumferential area of the oil slinger (2). A transmission housing (1) includes the oil guidance arrangement. The oil slinger (2) of the oil guidance arrangement is attached to a transmission housing-side centering plate (10) and surrounds a clutch (6). By rotation of the clutch (6), oil is guidable radially outward to the guide area (3) of the oil slinger (2).

An implement system for a machine includes a boom housing a drive mechanism for a cutting implement, and having a plurality of oil outlet ports formed therein. A control mechanism is configured to receive data indicative of an expected change in location of the outlet ports relative to an oil fill line within the boom, and vary a pattern of incoming oil flow to limit entrainment of air in the oil.