发明名称 |
Processing position-related input data from a rotational machine whose angular speed is variable |
摘要 |
A data processor and method for processing position-related input data from a rotational machine whose angular speed is variable and providing output data at an output data rate. The processor comprises a time-based over-sampler for over-sampling the input data at an over-sampling rate greater than the output data rate, and a down-sampler for extracting samples of over-sampled data from the over-sampler at the output data rate so as to provide the output data. The down-sampler is responsive to an angular timing signal related to an angular position of the machine for selecting the samples of over-sampled data to extract based on the angular position. Application to a rotational machine whose angular speed is variable, in particular to an internal combustion engine to control engine operating parameters as a function of cylinder pressure. |
申请公布号 |
US8909499(B2) |
申请公布日期 |
2014.12.09 |
申请号 |
US200812999084 |
申请日期 |
2008.07.03 |
申请人 |
Freescale Semiconductor, Inc. |
发明人 |
Garrard Mike;Emerson Geoff;Robertson Alistair |
分类号 |
G01P3/00;F02D41/00;F02D35/02 |
主分类号 |
G01P3/00 |
代理机构 |
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代理人 |
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主权项 |
1. A data processor for processing position-related input data from a rotational machine whose angular speed is variable and providing output data at an output data rate, the data processor comprising:
an oversampling clock; an over-sampler coupled to the oversampling clock to over-sample said input data at an over-sampling rate greater than said output data rate based upon an output of the oversampling clock; a down-sampler for extracting samples of over-sampled data from said over-sampler at said output data rate so as to provide said output data; and an angular timing signal source for producing an angular timing signal related to an angular position of the machine, wherein said down-sampler is connected to said angular timing signal source for selecting said samples of over-sampled data to extract based on said angular position. |
地址 |
Austin TX US |