Engine throttle control apparatus
AssigneeNissan Motor Co., Ltd.
InventorsNobutaka Takahashi, Yoshitaka Deguchi
Life of this patent
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Abstract
The invention ensures that a vehicle responds in accordance with a driver's expectations during negative pressure control (or boost control). A negative pressure control target intake air flow rate is calculated. This air flow rate ensures that the pressure in a cylinder does not drop too low (which could increase oil leakage into the cylinder). A greater one of an ISC (idle speed control) target torque and a negative pressure control target intake air flow rate torque-converted value is selected. The selected torque is set as an engine demand torque. The engine demand torque is combined with a driver demand torque to calculate a target torque. The throttle valve is controlled in an electronic manner based on the target torque.
Claims10
An engine throttle controller for a vehicle having an engine, the controller comprising:
- a driver's demand torque calculation section to calculate a driver's demand torque that corresponds to a driver's request based on at least accelerator position;
- an engine demand torque calculation section to calculate a first parameter representing a torque that the engine requires irrespective of a driver's accelerator request;
- a minimum air flow calculation section to calculate a second parameter representing a minimum air flow into the engine;
- a selection section to select a greater one of the first parameter and the second parameter;
- and
- a combination section to combine the driver's demand torque with a torque corresponding to the parameter selected by the selection section to produce a target torque to control engine air intake.
Dependencies are inferred from the claim text.