Lubrication system for an internal combustion engine, and method for lubrication
First Claim
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1. A lubrication system for an internal combustion engine, comprising:
- an oil lubricant circuit;
a radiator for cooling a lubricant;
a piston cooling jet coupled in the oil lubricant circuit;
a chemical heat accumulator arranged upstream of the engine for warming up the lubricant, the heat accumulator connected in parallel to the radiator;
a valve for switching over the lubricant circuit between the radiator and the heat accumulator; and
a controller with computer-readable instructions stored in non-transitory memory for;
operating the lubrication system in a first mode when a lubricant temperature is below a threshold;
operating the lubrication system in a second mode when the lubricant temperature is above the threshold; and
charging the chemical heat accumulator during the second mode.
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Abstract
Embodiments for a lubrication system for an internal combustion engine are provided. In one example, a lubrication system for an internal combustion engine comprises a lubricant circuit, a radiator for cooling the lubricant, a heat accumulator arranged upstream of the engine for warming up the lubricant, the heat accumulator connected in parallel to the radiator, and a valve for switching over the lubricant circuit between the radiator and the heat accumulator. In this way, the oil may be rapidly heated during cold engine start conditions.
11 Citations
13 Claims
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1. A lubrication system for an internal combustion engine, comprising:
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an oil lubricant circuit; a radiator for cooling a lubricant; a piston cooling jet coupled in the oil lubricant circuit; a chemical heat accumulator arranged upstream of the engine for warming up the lubricant, the heat accumulator connected in parallel to the radiator; a valve for switching over the lubricant circuit between the radiator and the heat accumulator; and a controller with computer-readable instructions stored in non-transitory memory for; operating the lubrication system in a first mode when a lubricant temperature is below a threshold; operating the lubrication system in a second mode when the lubricant temperature is above the threshold; and charging the chemical heat accumulator during the second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for lubricating an internal combustion engine with a lubricant circuit, comprising:
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circulating a lubricant along a chemical heat accumulator in a warming up mode with a valve in a first position; switching over to the lubricant circuit into a normal mode by actuating the valve to a second position; circulating the lubricant along a radiator which is connected in parallel to the heat accumulator in the normal mode with the valve in the second position; during the warming up mode, actuating the valve to a third position in response to the chemical heat accumulator being discharged, where the third position delivers the lubricant from a pump directly to the engine without passing through the radiator or the chemical heat accumulator; recharging the heat accumulator during the normal mode in response to the heat accumulator not being charged; and delivering the lubricant to a piston cooling jet of the engine. - View Dependent Claims (11, 12, 13)
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Specification