Boots – shoes – and leggings
Patent
1988-08-29
1989-07-11
Chin, Gary
Boots, shoes, and leggings
340449, 3404574, 731173, 73 64, G06F 1520, F01M 1110
Patent
active
048477680
ABSTRACT:
An apparatus and method is disclosed for indicating useful life of motor vehicle angine oil during engine operation based on engine oil temperature without direct measurement thereof. Following the initiation of engine operation, engine oil temperature is calculated from a warmup equation until calculated engine oil temperature exceeds a warmup reference, whereupon it is calculated from an equilibrium equation, both of which equations being linear combinations of engine operating parameters other than engine oil temperature itself. The warmup equation includes a constant term, a reference temperature term fixed at the begining of engine operation and a term increasing proportionally with the number of engine cylinder firings. The equilibrium equation includes a constant term, an engine temperature term and a term proportional to engine speed and may also include a term proportional to an engine cooling factor.
REFERENCES:
patent: 4007629 (1977-02-01), Hochstein
patent: 4328480 (1982-05-01), Keitel et al.
patent: 4506337 (1985-03-01), Yasuhara
patent: 4533900 (1985-08-01), Muhlberger et al.
patent: 4551703 (1985-11-01), Rourauel et al.
patent: 4629334 (1986-12-01), Hochstein
patent: 4677847 (1987-07-01), Sawatari et al.
patent: 4706193 (1987-11-01), Imajo et al.
patent: 4742476 (1988-05-01), Schwartz et al.
patent: 4796204 (1989-01-01), Inoue
"Development of an Automatic Engine Oil-change Indicator System", SAE 870403, 2/87.
Keersmaekers John D.
Schwartz Ellen S.
Smolenski Donald J.
Traylor Christine M.
Wallo Gary J.
Chin Gary
General Motors Corporation
Sigler Robert M.
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