Method and arrangement for controlling a vehicle
AssigneeRobert Bosch GmbH
InventorHong Zhang
Life of this patent
Estimating the term…
Abstract
A method and an arrangement for controlling the drive power of a vehicle are suggested wherein, on the basis of a desired value for the torque to be outputted by the drive unit, the following are influenced in the sense of preparing the desired value: the ratio of the air supplied to the drive unit and of the fuel supplied as well as the ignition angle and/or the metering of fuel to the individual cylinders. The interventions into the air/fuel ratio as well as the ignition angle and/or the metering of fuel are synchronized with each other so that the torque-changing effects of the individual interventions occur essentially at the same time point especially at the same inducting cylinder.
Claims10
A method of controlling a torque of an internal combustion engine to a changeable pregiven desired value (Mides), the method comprising the steps of:
- controlling at least one of the following parameters which influence said torque of said engine:
- (a air/fuel ratio (.lambda.);
- (b) ignition angle (.alpha.z);
- and,
- (c) number of deactivated cylinders (XZ);
- so that said torque approaches said desired value (Mides) thereof by performing the following additional steps:
- forming a desired value (.lambda.des, .alpha.zdes, XZdes) for said at least one of said parameters (.lambda., .alpha.z, XZ) in dependence upon said desired value (Mides) of said torque, the engine load (tl) and the respective settings of said air/fuel ratio (.lambda.), said ignition angle (.alpha.z) and said number of deactivated cylinders (XZ);
- and,
- controlling said at least one of said parameters (.lambda., .alpha.z, XZ) to said at least one of said desired values (.lambda.des, .alpha.zdes, XZdes) thereby causing the torque of said engine to approach said desired value (Mides).
An arrangement for controlling a toque of an internal combustion engine to a changeable pregiven desired value (Mides), the arrangement comprising:
- means for controlling at one of the following parameters which influence said torque of said engine:
- (a) air/fuel ratio (.lambda.);
- (b) ignition angle (.alpha.z);
- and
- (c) number of deactivated cylinders (XZ);
- means for forming a desired value (.lambda.des, .alpha.zdes, XZdes) for said at least one of said parameters (.lambda., .alpha.z, XZ) in dependence upon said desired value (Mides) of said torque, the engine load (tl) and respective settings of said air/fuel ratio (.lambda.), said ignition angle (.alpha.z) and said number of deactivated cylinders (XZ);
- and,
- means for controlling said at least one of said parameters (.lambda., .alpha.z, XZ) to said at least one of said desired values (.lambda.des, .alpha.zdes, XZdes) thereby causing the torque of said engine to approach said desired value (Mides).
Dependencies are inferred from the claim text.